./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/06-symbeq_23-idxsense_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/06-symbeq_23-idxsense_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 9205365dcda04af07212d180b1c6367c5de79b6e0d2e09ec11b949fed58626f5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:25:17,159 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:25:17,301 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:25:17,316 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:25:17,317 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:25:17,362 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:25:17,364 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:25:17,365 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:25:17,366 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:25:17,372 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:25:17,373 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:25:17,374 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:25:17,374 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:25:17,376 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:25:17,377 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:25:17,378 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:25:17,378 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:25:17,379 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:25:17,379 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:25:17,380 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:25:17,380 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:25:17,381 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:25:17,382 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:25:17,382 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:25:17,383 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:25:17,383 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:25:17,385 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:25:17,385 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:25:17,386 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:25:17,386 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:25:17,388 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:25:17,389 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:25:17,389 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:25:17,389 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:25:17,390 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:25:17,390 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:25:17,390 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:25:17,391 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:25:17,391 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_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9205365dcda04af07212d180b1c6367c5de79b6e0d2e09ec11b949fed58626f5 [2023-11-06 22:25:17,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:25:17,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:25:17,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:25:17,851 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:25:17,852 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:25:17,854 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/06-symbeq_23-idxsense_nr.i [2023-11-06 22:25:21,083 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:25:21,410 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:25:21,411 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/sv-benchmarks/c/goblint-regression/06-symbeq_23-idxsense_nr.i [2023-11-06 22:25:21,429 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/data/7f8340759/8a786981481344e28e5ef94fde587a01/FLAGf8f921c4c [2023-11-06 22:25:21,449 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/data/7f8340759/8a786981481344e28e5ef94fde587a01 [2023-11-06 22:25:21,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:25:21,455 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:25:21,457 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:25:21,458 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:25:21,467 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:25:21,468 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:25:21" (1/1) ... [2023-11-06 22:25:21,469 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31b42204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:21, skipping insertion in model container [2023-11-06 22:25:21,470 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:25:21" (1/1) ... [2023-11-06 22:25:21,519 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:25:21,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:25:21,918 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:25:22,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:25:22,064 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:25:22,064 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:22 WrapperNode [2023-11-06 22:25:22,064 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:25:22,066 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:25:22,066 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:25:22,066 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:25:22,076 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:22" (1/1) ... [2023-11-06 22:25:22,114 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:22" (1/1) ... [2023-11-06 22:25:22,146 INFO L138 Inliner]: procedures = 161, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2023-11-06 22:25:22,147 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:25:22,148 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:25:22,148 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:25:22,148 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:25:22,162 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:22" (1/1) ... [2023-11-06 22:25:22,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:22" (1/1) ... [2023-11-06 22:25:22,166 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:22" (1/1) ... [2023-11-06 22:25:22,166 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:22" (1/1) ... [2023-11-06 22:25:22,183 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:22" (1/1) ... [2023-11-06 22:25:22,188 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:22" (1/1) ... [2023-11-06 22:25:22,190 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:22" (1/1) ... [2023-11-06 22:25:22,192 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:22" (1/1) ... [2023-11-06 22:25:22,195 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:25:22,199 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:25:22,199 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:25:22,199 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:25:22,200 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:22" (1/1) ... [2023-11-06 22:25:22,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:25:22,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:22,288 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:25:22,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:25:22,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:25:22,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:25:22,400 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:25:22,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:25:22,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:25:22,401 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 22:25:22,401 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 22:25:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:25:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:25:22,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:25:22,404 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:25:22,602 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:25:22,604 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:25:22,874 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:25:22,881 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:25:22,881 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:25:22,883 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:25:22 BoogieIcfgContainer [2023-11-06 22:25:22,884 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:25:22,886 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:25:22,886 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:25:22,890 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:25:22,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:25:21" (1/3) ... [2023-11-06 22:25:22,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd12aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:25:22, skipping insertion in model container [2023-11-06 22:25:22,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:22" (2/3) ... [2023-11-06 22:25:22,892 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd12aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:25:22, skipping insertion in model container [2023-11-06 22:25:22,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:25:22" (3/3) ... [2023-11-06 22:25:22,893 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_23-idxsense_nr.i [2023-11-06 22:25:22,914 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:25:22,915 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-11-06 22:25:22,915 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:25:22,983 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:25:23,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 78 transitions, 160 flow [2023-11-06 22:25:23,062 INFO L124 PetriNetUnfolderBase]: 2/77 cut-off events. [2023-11-06 22:25:23,063 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:23,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 77 events. 2/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 91 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2023-11-06 22:25:23,068 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 78 transitions, 160 flow [2023-11-06 22:25:23,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 77 transitions, 157 flow [2023-11-06 22:25:23,078 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:25:23,099 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 77 transitions, 157 flow [2023-11-06 22:25:23,109 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 77 transitions, 157 flow [2023-11-06 22:25:23,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 157 flow [2023-11-06 22:25:23,138 INFO L124 PetriNetUnfolderBase]: 2/77 cut-off events. [2023-11-06 22:25:23,138 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:23,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 77 events. 2/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 90 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2023-11-06 22:25:23,141 INFO L119 LiptonReduction]: Number of co-enabled transitions 1050 [2023-11-06 22:25:25,749 INFO L134 LiptonReduction]: Checked pairs total: 2608 [2023-11-06 22:25:25,750 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-11-06 22:25:25,784 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:25:25,798 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;@46d2628f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:25:25,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-06 22:25:25,805 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:25:25,805 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:25:25,805 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:25,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:25,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:25:25,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:25:25,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:25,817 INFO L85 PathProgramCache]: Analyzing trace with hash 9088, now seen corresponding path program 1 times [2023-11-06 22:25:25,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:25,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719653308] [2023-11-06 22:25:25,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:25,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:26,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:26,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719653308] [2023-11-06 22:25:26,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719653308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:26,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:26,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:25:26,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185499800] [2023-11-06 22:25:26,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:26,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:25:26,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:26,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:25:26,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:25:26,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 152 [2023-11-06 22:25:26,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 67 flow. Second operand has 2 states, 2 states have (on average 77.0) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:26,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:26,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 152 [2023-11-06 22:25:26,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:26,207 INFO L124 PetriNetUnfolderBase]: 85/202 cut-off events. [2023-11-06 22:25:26,207 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:26,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 202 events. 85/202 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 753 event pairs, 84 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 385. Up to 192 conditions per place. [2023-11-06 22:25:26,213 INFO L140 encePairwiseOnDemand]: 145/152 looper letters, 23 selfloop transitions, 0 changer transitions 0/25 dead transitions. [2023-11-06 22:25:26,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 99 flow [2023-11-06 22:25:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:25:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:25:26,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 182 transitions. [2023-11-06 22:25:26,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986842105263158 [2023-11-06 22:25:26,233 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 182 transitions. [2023-11-06 22:25:26,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 182 transitions. [2023-11-06 22:25:26,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:26,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 182 transitions. [2023-11-06 22:25:26,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 91.0) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:26,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:26,250 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:26,253 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 67 flow. Second operand 2 states and 182 transitions. [2023-11-06 22:25:26,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 99 flow [2023-11-06 22:25:26,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 25 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:25:26,259 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 52 flow [2023-11-06 22:25:26,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-11-06 22:25:26,267 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -7 predicate places. [2023-11-06 22:25:26,267 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 52 flow [2023-11-06 22:25:26,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 77.0) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:26,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:26,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:25:26,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:25:26,269 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:25:26,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:26,271 INFO L85 PathProgramCache]: Analyzing trace with hash 8737490, now seen corresponding path program 1 times [2023-11-06 22:25:26,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:26,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913239669] [2023-11-06 22:25:26,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:26,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:26,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:26,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913239669] [2023-11-06 22:25:26,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913239669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:26,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:26,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:26,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466930341] [2023-11-06 22:25:26,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:26,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:26,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:26,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:26,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:26,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 152 [2023-11-06 22:25:26,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:26,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:26,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 152 [2023-11-06 22:25:26,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:26,591 INFO L124 PetriNetUnfolderBase]: 85/203 cut-off events. [2023-11-06 22:25:26,591 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:26,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 203 events. 85/203 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 753 event pairs, 84 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 397. Up to 192 conditions per place. [2023-11-06 22:25:26,594 INFO L140 encePairwiseOnDemand]: 149/152 looper letters, 22 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-11-06 22:25:26,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 26 transitions, 102 flow [2023-11-06 22:25:26,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:26,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:26,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2023-11-06 22:25:26,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153508771929824 [2023-11-06 22:25:26,610 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 235 transitions. [2023-11-06 22:25:26,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 235 transitions. [2023-11-06 22:25:26,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:26,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 235 transitions. [2023-11-06 22:25:26,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:26,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:26,615 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:26,616 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 52 flow. Second operand 3 states and 235 transitions. [2023-11-06 22:25:26,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 26 transitions, 102 flow [2023-11-06 22:25:26,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 26 transitions, 102 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:25:26,618 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 64 flow [2023-11-06 22:25:26,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-06 22:25:26,619 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -4 predicate places. [2023-11-06 22:25:26,619 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 64 flow [2023-11-06 22:25:26,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:26,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:26,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:25:26,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:25:26,624 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:25:26,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:26,628 INFO L85 PathProgramCache]: Analyzing trace with hash 270749335, now seen corresponding path program 1 times [2023-11-06 22:25:26,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:26,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484199689] [2023-11-06 22:25:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:26,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:26,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:26,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484199689] [2023-11-06 22:25:26,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484199689] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:25:26,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048449040] [2023-11-06 22:25:26,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:26,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:26,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:26,807 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:25:26,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:25:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:26,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:25:26,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:26,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:25:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:26,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048449040] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:25:26,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:25:26,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:25:26,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676659565] [2023-11-06 22:25:27,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:25:27,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:25:27,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:27,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:25:27,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:25:27,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 152 [2023-11-06 22:25:27,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 64 flow. Second operand has 7 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:27,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:27,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 152 [2023-11-06 22:25:27,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:27,208 INFO L124 PetriNetUnfolderBase]: 85/206 cut-off events. [2023-11-06 22:25:27,208 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:27,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 206 events. 85/206 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 753 event pairs, 84 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 411. Up to 192 conditions per place. [2023-11-06 22:25:27,215 INFO L140 encePairwiseOnDemand]: 149/152 looper letters, 22 selfloop transitions, 5 changer transitions 0/29 dead transitions. [2023-11-06 22:25:27,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 130 flow [2023-11-06 22:25:27,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:25:27,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:25:27,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 444 transitions. [2023-11-06 22:25:27,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4868421052631579 [2023-11-06 22:25:27,220 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 444 transitions. [2023-11-06 22:25:27,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 444 transitions. [2023-11-06 22:25:27,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:27,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 444 transitions. [2023-11-06 22:25:27,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:27,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 152.0) internal successors, (1064), 7 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:27,232 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 152.0) internal successors, (1064), 7 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:27,233 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 6 states and 444 transitions. [2023-11-06 22:25:27,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 130 flow [2023-11-06 22:25:27,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 29 transitions, 126 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:25:27,235 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 96 flow [2023-11-06 22:25:27,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=96, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-11-06 22:25:27,238 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2023-11-06 22:25:27,238 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 96 flow [2023-11-06 22:25:27,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:27,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:27,239 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-06 22:25:27,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:25:27,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:27,445 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:25:27,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:27,445 INFO L85 PathProgramCache]: Analyzing trace with hash -167207918, now seen corresponding path program 2 times [2023-11-06 22:25:27,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:27,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23022179] [2023-11-06 22:25:27,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:27,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:27,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:27,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23022179] [2023-11-06 22:25:27,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23022179] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:25:27,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061505308] [2023-11-06 22:25:27,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:25:27,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:27,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:27,645 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:25:27,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:25:27,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:25:27,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:25:27,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:25:27,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:27,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:27,871 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:25:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:25:27,898 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:25:27,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061505308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:27,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:25:27,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-11-06 22:25:27,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057299092] [2023-11-06 22:25:27,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:27,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:25:27,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:27,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:25:27,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:25:27,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 152 [2023-11-06 22:25:27,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:27,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:27,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 152 [2023-11-06 22:25:27,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:28,066 INFO L124 PetriNetUnfolderBase]: 61/153 cut-off events. [2023-11-06 22:25:28,066 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:25:28,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 153 events. 61/153 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 487 event pairs, 60 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 317. Up to 144 conditions per place. [2023-11-06 22:25:28,068 INFO L140 encePairwiseOnDemand]: 148/152 looper letters, 23 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-11-06 22:25:28,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 138 flow [2023-11-06 22:25:28,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:28,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2023-11-06 22:25:28,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49780701754385964 [2023-11-06 22:25:28,071 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 227 transitions. [2023-11-06 22:25:28,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 227 transitions. [2023-11-06 22:25:28,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:28,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 227 transitions. [2023-11-06 22:25:28,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:28,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:28,075 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:28,075 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 96 flow. Second operand 3 states and 227 transitions. [2023-11-06 22:25:28,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 138 flow [2023-11-06 22:25:28,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 124 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 22:25:28,078 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 78 flow [2023-11-06 22:25:28,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-11-06 22:25:28,079 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2023-11-06 22:25:28,080 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 78 flow [2023-11-06 22:25:28,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:28,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:28,080 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-06 22:25:28,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:25:28,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:28,287 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:25:28,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:28,288 INFO L85 PathProgramCache]: Analyzing trace with hash -167207904, now seen corresponding path program 1 times [2023-11-06 22:25:28,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:28,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110322438] [2023-11-06 22:25:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:28,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:28,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:28,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110322438] [2023-11-06 22:25:28,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110322438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:25:28,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133098272] [2023-11-06 22:25:28,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:28,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:28,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:28,452 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:25:28,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:25:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:28,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:25:28,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:28,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:25:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:28,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133098272] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:25:28,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:25:28,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:25:28,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259602232] [2023-11-06 22:25:28,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:25:28,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:25:28,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:28,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:25:28,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:25:28,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 152 [2023-11-06 22:25:28,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 78 flow. Second operand has 13 states, 13 states have (on average 70.23076923076923) internal successors, (913), 13 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:28,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:28,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 152 [2023-11-06 22:25:28,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:28,798 INFO L124 PetriNetUnfolderBase]: 61/159 cut-off events. [2023-11-06 22:25:28,798 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-11-06 22:25:28,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 159 events. 61/159 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 487 event pairs, 60 based on Foata normal form. 6/127 useless extension candidates. Maximal degree in co-relation 335. Up to 141 conditions per place. [2023-11-06 22:25:28,804 INFO L140 encePairwiseOnDemand]: 149/152 looper letters, 19 selfloop transitions, 11 changer transitions 0/32 dead transitions. [2023-11-06 22:25:28,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 32 transitions, 174 flow [2023-11-06 22:25:28,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:25:28,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:25:28,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 864 transitions. [2023-11-06 22:25:28,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2023-11-06 22:25:28,829 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 864 transitions. [2023-11-06 22:25:28,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 864 transitions. [2023-11-06 22:25:28,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:28,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 864 transitions. [2023-11-06 22:25:28,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 72.0) internal successors, (864), 12 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:28,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 152.0) internal successors, (1976), 13 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:28,844 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 152.0) internal successors, (1976), 13 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:28,845 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 78 flow. Second operand 12 states and 864 transitions. [2023-11-06 22:25:28,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 32 transitions, 174 flow [2023-11-06 22:25:28,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 32 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:25:28,851 INFO L231 Difference]: Finished difference. Result has 52 places, 32 transitions, 161 flow [2023-11-06 22:25:28,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=161, PETRI_PLACES=52, PETRI_TRANSITIONS=32} [2023-11-06 22:25:28,855 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 17 predicate places. [2023-11-06 22:25:28,855 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 32 transitions, 161 flow [2023-11-06 22:25:28,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 70.23076923076923) internal successors, (913), 13 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:28,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:28,856 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-11-06 22:25:28,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:25:29,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:29,064 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:25:29,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:29,064 INFO L85 PathProgramCache]: Analyzing trace with hash -36561408, now seen corresponding path program 2 times [2023-11-06 22:25:29,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:29,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516830325] [2023-11-06 22:25:29,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:29,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:25:29,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:29,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516830325] [2023-11-06 22:25:29,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516830325] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:29,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:29,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:29,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527437007] [2023-11-06 22:25:29,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:29,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:25:29,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:29,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:25:29,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:25:29,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 152 [2023-11-06 22:25:29,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 32 transitions, 161 flow. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:29,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:29,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 152 [2023-11-06 22:25:29,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:29,540 INFO L124 PetriNetUnfolderBase]: 35/112 cut-off events. [2023-11-06 22:25:29,540 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-06 22:25:29,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 112 events. 35/112 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 281 event pairs, 28 based on Foata normal form. 5/108 useless extension candidates. Maximal degree in co-relation 269. Up to 81 conditions per place. [2023-11-06 22:25:29,542 INFO L140 encePairwiseOnDemand]: 143/152 looper letters, 30 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2023-11-06 22:25:29,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 36 transitions, 239 flow [2023-11-06 22:25:29,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:25:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:25:29,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 278 transitions. [2023-11-06 22:25:29,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45723684210526316 [2023-11-06 22:25:29,547 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 278 transitions. [2023-11-06 22:25:29,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 278 transitions. [2023-11-06 22:25:29,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:29,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 278 transitions. [2023-11-06 22:25:29,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:29,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:29,555 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:29,555 INFO L175 Difference]: Start difference. First operand has 52 places, 32 transitions, 161 flow. Second operand 4 states and 278 transitions. [2023-11-06 22:25:29,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 36 transitions, 239 flow [2023-11-06 22:25:29,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 36 transitions, 191 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-06 22:25:29,567 INFO L231 Difference]: Finished difference. Result has 51 places, 32 transitions, 143 flow [2023-11-06 22:25:29,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=51, PETRI_TRANSITIONS=32} [2023-11-06 22:25:29,571 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2023-11-06 22:25:29,571 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 32 transitions, 143 flow [2023-11-06 22:25:29,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:29,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:29,572 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:29,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:25:29,573 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:25:29,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:29,575 INFO L85 PathProgramCache]: Analyzing trace with hash -45361347, now seen corresponding path program 1 times [2023-11-06 22:25:29,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:29,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727986982] [2023-11-06 22:25:29,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:29,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:25:29,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:29,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727986982] [2023-11-06 22:25:29,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727986982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:29,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:29,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:29,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153721546] [2023-11-06 22:25:29,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:29,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:25:29,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:29,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:25:29,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:25:29,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 152 [2023-11-06 22:25:29,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 32 transitions, 143 flow. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:29,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:29,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 152 [2023-11-06 22:25:29,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:30,059 INFO L124 PetriNetUnfolderBase]: 28/92 cut-off events. [2023-11-06 22:25:30,060 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-11-06 22:25:30,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 92 events. 28/92 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 201 event pairs, 24 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 237. Up to 60 conditions per place. [2023-11-06 22:25:30,062 INFO L140 encePairwiseOnDemand]: 148/152 looper letters, 23 selfloop transitions, 3 changer transitions 6/34 dead transitions. [2023-11-06 22:25:30,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 34 transitions, 209 flow [2023-11-06 22:25:30,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:25:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:25:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 290 transitions. [2023-11-06 22:25:30,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4769736842105263 [2023-11-06 22:25:30,065 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 290 transitions. [2023-11-06 22:25:30,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 290 transitions. [2023-11-06 22:25:30,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:30,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 290 transitions. [2023-11-06 22:25:30,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:30,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:30,070 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:30,070 INFO L175 Difference]: Start difference. First operand has 51 places, 32 transitions, 143 flow. Second operand 4 states and 290 transitions. [2023-11-06 22:25:30,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 34 transitions, 209 flow [2023-11-06 22:25:30,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 34 transitions, 207 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:25:30,075 INFO L231 Difference]: Finished difference. Result has 52 places, 27 transitions, 123 flow [2023-11-06 22:25:30,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=52, PETRI_TRANSITIONS=27} [2023-11-06 22:25:30,076 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 17 predicate places. [2023-11-06 22:25:30,076 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 27 transitions, 123 flow [2023-11-06 22:25:30,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:30,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:30,077 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:30,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:25:30,079 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:25:30,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:30,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2072130374, now seen corresponding path program 1 times [2023-11-06 22:25:30,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:30,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719156672] [2023-11-06 22:25:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:30,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:25:30,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:30,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719156672] [2023-11-06 22:25:30,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719156672] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:30,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:30,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:25:30,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976564662] [2023-11-06 22:25:30,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:30,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:25:30,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:30,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:25:30,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:25:30,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 152 [2023-11-06 22:25:30,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 27 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 59.8) internal successors, (299), 5 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:30,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:30,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 152 [2023-11-06 22:25:30,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:30,422 INFO L124 PetriNetUnfolderBase]: 16/58 cut-off events. [2023-11-06 22:25:30,422 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2023-11-06 22:25:30,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 58 events. 16/58 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 15 based on Foata normal form. 2/60 useless extension candidates. Maximal degree in co-relation 159. Up to 43 conditions per place. [2023-11-06 22:25:30,423 INFO L140 encePairwiseOnDemand]: 148/152 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2023-11-06 22:25:30,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 25 transitions, 161 flow [2023-11-06 22:25:30,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:25:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:25:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 244 transitions. [2023-11-06 22:25:30,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40131578947368424 [2023-11-06 22:25:30,426 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 244 transitions. [2023-11-06 22:25:30,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 244 transitions. [2023-11-06 22:25:30,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:30,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 244 transitions. [2023-11-06 22:25:30,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:30,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:30,430 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:30,430 INFO L175 Difference]: Start difference. First operand has 52 places, 27 transitions, 123 flow. Second operand 4 states and 244 transitions. [2023-11-06 22:25:30,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 25 transitions, 161 flow [2023-11-06 22:25:30,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 25 transitions, 151 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-06 22:25:30,433 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-11-06 22:25:30,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-11-06 22:25:30,436 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 10 predicate places. [2023-11-06 22:25:30,436 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-11-06 22:25:30,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.8) internal successors, (299), 5 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:30,440 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 20 remaining) [2023-11-06 22:25:30,456 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2023-11-06 22:25:30,457 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2023-11-06 22:25:30,457 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2023-11-06 22:25:30,457 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2023-11-06 22:25:30,457 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2023-11-06 22:25:30,458 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2023-11-06 22:25:30,458 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2023-11-06 22:25:30,458 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2023-11-06 22:25:30,458 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2023-11-06 22:25:30,458 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (9 of 20 remaining) [2023-11-06 22:25:30,458 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 20 remaining) [2023-11-06 22:25:30,459 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 20 remaining) [2023-11-06 22:25:30,459 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 20 remaining) [2023-11-06 22:25:30,459 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 20 remaining) [2023-11-06 22:25:30,459 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 20 remaining) [2023-11-06 22:25:30,459 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 20 remaining) [2023-11-06 22:25:30,459 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 20 remaining) [2023-11-06 22:25:30,460 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 20 remaining) [2023-11-06 22:25:30,460 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 20 remaining) [2023-11-06 22:25:30,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:25:30,460 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2023-11-06 22:25:30,467 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-06 22:25:30,467 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 22:25:30,471 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:25:30 BasicIcfg [2023-11-06 22:25:30,472 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 22:25:30,472 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 22:25:30,472 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 22:25:30,473 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 22:25:30,473 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:25:22" (3/4) ... [2023-11-06 22:25:30,475 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-06 22:25:30,480 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2023-11-06 22:25:30,485 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-11-06 22:25:30,485 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-06 22:25:30,485 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-06 22:25:30,540 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.graphml [2023-11-06 22:25:30,541 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.yaml [2023-11-06 22:25:30,541 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 22:25:30,542 INFO L158 Benchmark]: Toolchain (without parser) took 9086.39ms. Allocated memory was 211.8MB in the beginning and 255.9MB in the end (delta: 44.0MB). Free memory was 181.0MB in the beginning and 217.9MB in the end (delta: -36.9MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. [2023-11-06 22:25:30,542 INFO L158 Benchmark]: CDTParser took 0.59ms. Allocated memory is still 130.0MB. Free memory is still 103.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:25:30,542 INFO L158 Benchmark]: CACSL2BoogieTranslator took 607.73ms. Allocated memory is still 211.8MB. Free memory was 180.8MB in the beginning and 166.9MB in the end (delta: 13.9MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. [2023-11-06 22:25:30,543 INFO L158 Benchmark]: Boogie Procedure Inliner took 81.25ms. Allocated memory is still 211.8MB. Free memory was 166.9MB in the beginning and 164.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:25:30,543 INFO L158 Benchmark]: Boogie Preprocessor took 47.58ms. Allocated memory is still 211.8MB. Free memory was 164.8MB in the beginning and 163.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:25:30,544 INFO L158 Benchmark]: RCFGBuilder took 685.27ms. Allocated memory is still 211.8MB. Free memory was 163.8MB in the beginning and 167.0MB in the end (delta: -3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-06 22:25:30,544 INFO L158 Benchmark]: TraceAbstraction took 7585.64ms. Allocated memory was 211.8MB in the beginning and 255.9MB in the end (delta: 44.0MB). Free memory was 167.0MB in the beginning and 221.1MB in the end (delta: -54.0MB). Peak memory consumption was 119.0MB. Max. memory is 16.1GB. [2023-11-06 22:25:30,545 INFO L158 Benchmark]: Witness Printer took 68.83ms. Allocated memory is still 255.9MB. Free memory was 221.1MB in the beginning and 217.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:25:30,547 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59ms. Allocated memory is still 130.0MB. Free memory is still 103.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 607.73ms. Allocated memory is still 211.8MB. Free memory was 180.8MB in the beginning and 166.9MB in the end (delta: 13.9MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 81.25ms. Allocated memory is still 211.8MB. Free memory was 166.9MB in the beginning and 164.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.58ms. Allocated memory is still 211.8MB. Free memory was 164.8MB in the beginning and 163.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 685.27ms. Allocated memory is still 211.8MB. Free memory was 163.8MB in the beginning and 167.0MB in the end (delta: -3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * TraceAbstraction took 7585.64ms. Allocated memory was 211.8MB in the beginning and 255.9MB in the end (delta: 44.0MB). Free memory was 167.0MB in the beginning and 221.1MB in the end (delta: -54.0MB). Peak memory consumption was 119.0MB. Max. memory is 16.1GB. * Witness Printer took 68.83ms. Allocated memory is still 255.9MB. Free memory was 221.1MB in the beginning and 217.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 79 PlacesBefore, 35 PlacesAfterwards, 77 TransitionsBefore, 32 TransitionsAfterwards, 1050 CoEnabledTransitionPairs, 4 FixpointIterations, 21 TrivialSequentialCompositions, 50 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 74 TotalNumberOfCompositions, 2608 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1319, independent: 1180, independent conditional: 0, independent unconditional: 1180, dependent: 139, dependent conditional: 0, dependent unconditional: 139, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 608, independent: 575, independent conditional: 0, independent unconditional: 575, dependent: 33, dependent conditional: 0, dependent unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1319, independent: 605, independent conditional: 0, independent unconditional: 605, dependent: 106, dependent conditional: 0, dependent unconditional: 106, unknown: 608, unknown conditional: 0, unknown unconditional: 608] , Statistics on independence cache: Total cache size (in pairs): 58, Positive cache size: 41, Positive conditional cache size: 0, Positive unconditional cache size: 41, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 687]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 94 locations, 20 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.4s, OverallIterations: 8, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 460 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 275 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 70 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 698 IncrementalHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 70 mSolverCounterUnsat, 3 mSDtfsCounter, 698 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=161occurred in iteration=5, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 108 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 591 SizeOfPredicates, 2 NumberOfNonLiveVariables, 232 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 175/218 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 15 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-06 22:25:30,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a7a9868-a8cb-4df4-abb4-f17dfbd3b92c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE