./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:48:46,572 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:48:46,697 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:48:46,707 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:48:46,708 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:48:46,749 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:48:46,750 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:48:46,751 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:48:46,752 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:48:46,757 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:48:46,758 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:48:46,759 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:48:46,760 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:48:46,761 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:48:46,762 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:48:46,762 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:48:46,763 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:48:46,763 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:48:46,764 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:48:46,764 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:48:46,765 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:48:46,765 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:48:46,766 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:48:46,768 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:48:46,768 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:48:46,769 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:48:46,770 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:48:46,770 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:48:46,771 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:48:46,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:48:46,773 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:48:46,773 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:48:46,773 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:48:46,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:48:46,774 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:48:46,774 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:48:46,774 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:48:46,775 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:48:46,775 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_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a [2023-11-19 07:48:47,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:48:47,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:48:47,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:48:47,146 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:48:47,147 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:48:47,149 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing-deref.i [2023-11-19 07:48:50,309 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:48:50,592 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:48:50,593 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing-deref.i [2023-11-19 07:48:50,611 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/data/b240a024f/19b7d9f84acd4ede91330a8dfe6b015d/FLAGaefb578cf [2023-11-19 07:48:50,626 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/data/b240a024f/19b7d9f84acd4ede91330a8dfe6b015d [2023-11-19 07:48:50,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:48:50,630 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:48:50,632 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:48:50,632 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:48:50,637 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:48:50,638 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:50" (1/1) ... [2023-11-19 07:48:50,639 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@455987b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:50, skipping insertion in model container [2023-11-19 07:48:50,640 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:50" (1/1) ... [2023-11-19 07:48:50,690 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:48:51,289 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:48:51,391 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:48:51,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:48:51,617 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:48:51,617 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:51 WrapperNode [2023-11-19 07:48:51,617 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:48:51,619 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:48:51,619 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:48:51,620 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:48:51,628 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:51" (1/1) ... [2023-11-19 07:48:51,675 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:51" (1/1) ... [2023-11-19 07:48:51,710 INFO L138 Inliner]: procedures = 278, calls = 61, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 239 [2023-11-19 07:48:51,711 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:48:51,712 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:48:51,712 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:48:51,712 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:48:51,723 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:51" (1/1) ... [2023-11-19 07:48:51,724 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:51" (1/1) ... [2023-11-19 07:48:51,730 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:51" (1/1) ... [2023-11-19 07:48:51,731 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:51" (1/1) ... [2023-11-19 07:48:51,744 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:51" (1/1) ... [2023-11-19 07:48:51,750 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:51" (1/1) ... [2023-11-19 07:48:51,753 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:51" (1/1) ... [2023-11-19 07:48:51,756 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:51" (1/1) ... [2023-11-19 07:48:51,762 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:48:51,763 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:48:51,763 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:48:51,763 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:48:51,764 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:51" (1/1) ... [2023-11-19 07:48:51,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:48:51,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:51,812 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:48:51,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:48:51,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:48:51,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 07:48:51,857 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-11-19 07:48:51,858 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-11-19 07:48:51,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:48:51,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:48:51,859 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-11-19 07:48:51,859 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-11-19 07:48:51,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:48:51,860 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:48:51,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:48:51,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:48:51,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 07:48:51,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:48:51,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:48:51,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:48:51,863 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:48:52,105 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:48:52,107 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:48:52,715 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:48:52,726 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:48:52,734 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-19 07:48:52,740 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:52 BoogieIcfgContainer [2023-11-19 07:48:52,740 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:48:52,742 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:48:52,743 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:48:52,751 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:48:52,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:48:50" (1/3) ... [2023-11-19 07:48:52,752 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f91b865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:52, skipping insertion in model container [2023-11-19 07:48:52,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:51" (2/3) ... [2023-11-19 07:48:52,753 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f91b865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:52, skipping insertion in model container [2023-11-19 07:48:52,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:52" (3/3) ... [2023-11-19 07:48:52,754 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing-deref.i [2023-11-19 07:48:52,775 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:48:52,776 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-19 07:48:52,776 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:48:52,927 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-19 07:48:52,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 298 transitions, 616 flow [2023-11-19 07:48:53,220 INFO L124 PetriNetUnfolderBase]: 56/567 cut-off events. [2023-11-19 07:48:53,220 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-19 07:48:53,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 567 events. 56/567 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2653 event pairs, 0 based on Foata normal form. 0/419 useless extension candidates. Maximal degree in co-relation 284. Up to 8 conditions per place. [2023-11-19 07:48:53,234 INFO L82 GeneralOperation]: Start removeDead. Operand has 277 places, 298 transitions, 616 flow [2023-11-19 07:48:53,251 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 277 places, 298 transitions, 616 flow [2023-11-19 07:48:53,255 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:48:53,269 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 277 places, 298 transitions, 616 flow [2023-11-19 07:48:53,272 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 277 places, 298 transitions, 616 flow [2023-11-19 07:48:53,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 298 transitions, 616 flow [2023-11-19 07:48:53,381 INFO L124 PetriNetUnfolderBase]: 56/567 cut-off events. [2023-11-19 07:48:53,381 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-19 07:48:53,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 567 events. 56/567 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2653 event pairs, 0 based on Foata normal form. 0/419 useless extension candidates. Maximal degree in co-relation 284. Up to 8 conditions per place. [2023-11-19 07:48:53,417 INFO L119 LiptonReduction]: Number of co-enabled transitions 30162 [2023-11-19 07:49:05,950 INFO L134 LiptonReduction]: Checked pairs total: 76105 [2023-11-19 07:49:05,951 INFO L136 LiptonReduction]: Total number of compositions: 280 [2023-11-19 07:49:05,982 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:49:05,989 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;@7f8aef26, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:49:05,990 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2023-11-19 07:49:05,994 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:49:05,995 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-11-19 07:49:05,995 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:49:05,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:05,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:49:05,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-19 07:49:06,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:06,002 INFO L85 PathProgramCache]: Analyzing trace with hash 37837, now seen corresponding path program 1 times [2023-11-19 07:49:06,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:06,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126337949] [2023-11-19 07:49:06,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:06,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:06,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:06,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126337949] [2023-11-19 07:49:06,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126337949] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:06,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:06,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:49:06,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477197542] [2023-11-19 07:49:06,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:06,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:49:06,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:06,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:49:06,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:49:06,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 578 [2023-11-19 07:49:06,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 116 transitions, 252 flow. Second operand has 2 states, 2 states have (on average 274.0) internal successors, (548), 2 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:06,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:06,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 578 [2023-11-19 07:49:06,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:10,714 INFO L124 PetriNetUnfolderBase]: 17637/30439 cut-off events. [2023-11-19 07:49:10,715 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2023-11-19 07:49:10,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57564 conditions, 30439 events. 17637/30439 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 246917 event pairs, 16922 based on Foata normal form. 1181/15498 useless extension candidates. Maximal degree in co-relation 54865. Up to 26986 conditions per place. [2023-11-19 07:49:11,006 INFO L140 encePairwiseOnDemand]: 562/578 looper letters, 80 selfloop transitions, 0 changer transitions 0/99 dead transitions. [2023-11-19 07:49:11,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 99 transitions, 378 flow [2023-11-19 07:49:11,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:49:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:49:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 642 transitions. [2023-11-19 07:49:11,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5553633217993079 [2023-11-19 07:49:11,033 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 642 transitions. [2023-11-19 07:49:11,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 642 transitions. [2023-11-19 07:49:11,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:11,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 642 transitions. [2023-11-19 07:49:11,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 321.0) internal successors, (642), 2 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:11,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 578.0) internal successors, (1734), 3 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:11,059 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 578.0) internal successors, (1734), 3 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:11,062 INFO L175 Difference]: Start difference. First operand has 102 places, 116 transitions, 252 flow. Second operand 2 states and 642 transitions. [2023-11-19 07:49:11,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 99 transitions, 378 flow [2023-11-19 07:49:11,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 99 transitions, 378 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:49:11,089 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 218 flow [2023-11-19 07:49:11,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=218, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2023-11-19 07:49:11,095 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -4 predicate places. [2023-11-19 07:49:11,096 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 218 flow [2023-11-19 07:49:11,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 274.0) internal successors, (548), 2 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:11,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:11,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:49:11,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:49:11,098 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-19 07:49:11,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:11,098 INFO L85 PathProgramCache]: Analyzing trace with hash 37856, now seen corresponding path program 1 times [2023-11-19 07:49:11,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:11,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88663399] [2023-11-19 07:49:11,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:11,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:11,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:11,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88663399] [2023-11-19 07:49:11,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88663399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:11,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:11,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:49:11,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90753866] [2023-11-19 07:49:11,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:11,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:11,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:11,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:11,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:11,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 578 [2023-11-19 07:49:11,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:11,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:11,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 578 [2023-11-19 07:49:11,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:14,922 INFO L124 PetriNetUnfolderBase]: 17366/29238 cut-off events. [2023-11-19 07:49:14,923 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2023-11-19 07:49:14,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56097 conditions, 29238 events. 17366/29238 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 1070. Compared 231772 event pairs, 11890 based on Foata normal form. 0/14379 useless extension candidates. Maximal degree in co-relation 56092. Up to 18802 conditions per place. [2023-11-19 07:49:15,067 INFO L140 encePairwiseOnDemand]: 573/578 looper letters, 122 selfloop transitions, 2 changer transitions 0/142 dead transitions. [2023-11-19 07:49:15,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 142 transitions, 552 flow [2023-11-19 07:49:15,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:15,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 931 transitions. [2023-11-19 07:49:15,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369088811995386 [2023-11-19 07:49:15,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 931 transitions. [2023-11-19 07:49:15,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 931 transitions. [2023-11-19 07:49:15,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:15,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 931 transitions. [2023-11-19 07:49:15,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 310.3333333333333) internal successors, (931), 3 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:15,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:15,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:15,085 INFO L175 Difference]: Start difference. First operand has 98 places, 99 transitions, 218 flow. Second operand 3 states and 931 transitions. [2023-11-19 07:49:15,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 142 transitions, 552 flow [2023-11-19 07:49:15,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 142 transitions, 552 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:49:15,094 INFO L231 Difference]: Finished difference. Result has 100 places, 98 transitions, 226 flow [2023-11-19 07:49:15,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=100, PETRI_TRANSITIONS=98} [2023-11-19 07:49:15,096 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -2 predicate places. [2023-11-19 07:49:15,096 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 98 transitions, 226 flow [2023-11-19 07:49:15,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:15,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:15,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:49:15,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:49:15,098 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-19 07:49:15,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:15,099 INFO L85 PathProgramCache]: Analyzing trace with hash 37855, now seen corresponding path program 1 times [2023-11-19 07:49:15,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:15,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158206534] [2023-11-19 07:49:15,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:15,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:15,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:15,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158206534] [2023-11-19 07:49:15,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158206534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:15,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:15,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:49:15,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733362576] [2023-11-19 07:49:15,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:15,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:15,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:15,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:15,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:15,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 578 [2023-11-19 07:49:15,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 98 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:15,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:15,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 578 [2023-11-19 07:49:15,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:18,622 INFO L124 PetriNetUnfolderBase]: 17456/30114 cut-off events. [2023-11-19 07:49:18,623 INFO L125 PetriNetUnfolderBase]: For 874/874 co-relation queries the response was YES. [2023-11-19 07:49:18,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58242 conditions, 30114 events. 17456/30114 cut-off events. For 874/874 co-relation queries the response was YES. Maximal size of possible extension queue 1030. Compared 239767 event pairs, 16735 based on Foata normal form. 0/15602 useless extension candidates. Maximal degree in co-relation 58235. Up to 26725 conditions per place. [2023-11-19 07:49:18,777 INFO L140 encePairwiseOnDemand]: 574/578 looper letters, 79 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-11-19 07:49:18,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 99 transitions, 390 flow [2023-11-19 07:49:18,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:18,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 869 transitions. [2023-11-19 07:49:18,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5011534025374856 [2023-11-19 07:49:18,782 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 869 transitions. [2023-11-19 07:49:18,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 869 transitions. [2023-11-19 07:49:18,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:18,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 869 transitions. [2023-11-19 07:49:18,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:18,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:18,793 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:18,793 INFO L175 Difference]: Start difference. First operand has 100 places, 98 transitions, 226 flow. Second operand 3 states and 869 transitions. [2023-11-19 07:49:18,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 99 transitions, 390 flow [2023-11-19 07:49:18,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 386 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:18,805 INFO L231 Difference]: Finished difference. Result has 101 places, 99 transitions, 236 flow [2023-11-19 07:49:18,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=101, PETRI_TRANSITIONS=99} [2023-11-19 07:49:18,806 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -1 predicate places. [2023-11-19 07:49:18,807 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 99 transitions, 236 flow [2023-11-19 07:49:18,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:18,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:18,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:49:18,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:49:18,808 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-19 07:49:18,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:18,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1174625, now seen corresponding path program 1 times [2023-11-19 07:49:18,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:18,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020904671] [2023-11-19 07:49:18,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:18,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:19,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:19,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020904671] [2023-11-19 07:49:19,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020904671] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:19,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386454652] [2023-11-19 07:49:19,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:19,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:19,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:19,183 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:19,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:49:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:19,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 07:49:19,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:19,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:49:19,444 INFO L378 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 [2023-11-19 07:49:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:19,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:19,625 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:19,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2023-11-19 07:49:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:19,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386454652] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:49:19,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:49:19,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 07:49:19,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079580851] [2023-11-19 07:49:19,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:49:19,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:49:19,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:19,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:49:19,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:49:22,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 578 [2023-11-19 07:49:22,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 99 transitions, 236 flow. Second operand has 8 states, 8 states have (on average 259.125) internal successors, (2073), 8 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:22,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:22,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 578 [2023-11-19 07:49:22,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:25,555 INFO L124 PetriNetUnfolderBase]: 17458/30119 cut-off events. [2023-11-19 07:49:25,555 INFO L125 PetriNetUnfolderBase]: For 375/375 co-relation queries the response was YES. [2023-11-19 07:49:25,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57753 conditions, 30119 events. 17458/30119 cut-off events. For 375/375 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 239823 event pairs, 16735 based on Foata normal form. 0/15095 useless extension candidates. Maximal degree in co-relation 57745. Up to 26727 conditions per place. [2023-11-19 07:49:25,715 INFO L140 encePairwiseOnDemand]: 574/578 looper letters, 79 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2023-11-19 07:49:25,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 104 transitions, 428 flow [2023-11-19 07:49:25,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:49:25,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:49:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1638 transitions. [2023-11-19 07:49:25,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47231833910034604 [2023-11-19 07:49:25,725 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1638 transitions. [2023-11-19 07:49:25,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1638 transitions. [2023-11-19 07:49:25,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:25,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1638 transitions. [2023-11-19 07:49:25,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:25,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 578.0) internal successors, (4046), 7 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:25,747 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 578.0) internal successors, (4046), 7 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:25,747 INFO L175 Difference]: Start difference. First operand has 101 places, 99 transitions, 236 flow. Second operand 6 states and 1638 transitions. [2023-11-19 07:49:25,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 104 transitions, 428 flow [2023-11-19 07:49:25,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 104 transitions, 424 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:49:25,761 INFO L231 Difference]: Finished difference. Result has 108 places, 104 transitions, 284 flow [2023-11-19 07:49:25,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=108, PETRI_TRANSITIONS=104} [2023-11-19 07:49:25,763 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 6 predicate places. [2023-11-19 07:49:25,764 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 104 transitions, 284 flow [2023-11-19 07:49:25,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 259.125) internal successors, (2073), 8 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:25,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:25,771 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-19 07:49:25,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:25,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:25,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-19 07:49:25,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:25,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1128848290, now seen corresponding path program 1 times [2023-11-19 07:49:25,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:25,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018099713] [2023-11-19 07:49:25,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:25,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:49:26,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:26,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018099713] [2023-11-19 07:49:26,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018099713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:26,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:26,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:49:26,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924857708] [2023-11-19 07:49:26,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:26,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:26,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:26,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:26,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:26,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 578 [2023-11-19 07:49:26,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 104 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:26,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:26,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 578 [2023-11-19 07:49:26,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:29,400 INFO L124 PetriNetUnfolderBase]: 16393/27570 cut-off events. [2023-11-19 07:49:29,400 INFO L125 PetriNetUnfolderBase]: For 343/343 co-relation queries the response was YES. [2023-11-19 07:49:29,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53737 conditions, 27570 events. 16393/27570 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 217063 event pairs, 10949 based on Foata normal form. 0/14029 useless extension candidates. Maximal degree in co-relation 53726. Up to 17316 conditions per place. [2023-11-19 07:49:29,542 INFO L140 encePairwiseOnDemand]: 574/578 looper letters, 124 selfloop transitions, 4 changer transitions 0/146 dead transitions. [2023-11-19 07:49:29,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 146 transitions, 624 flow [2023-11-19 07:49:29,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:29,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 913 transitions. [2023-11-19 07:49:29,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5265282583621684 [2023-11-19 07:49:29,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 913 transitions. [2023-11-19 07:49:29,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 913 transitions. [2023-11-19 07:49:29,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:29,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 913 transitions. [2023-11-19 07:49:29,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.3333333333333) internal successors, (913), 3 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) [2023-11-19 07:49:29,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:29,559 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:29,560 INFO L175 Difference]: Start difference. First operand has 108 places, 104 transitions, 284 flow. Second operand 3 states and 913 transitions. [2023-11-19 07:49:29,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 146 transitions, 624 flow [2023-11-19 07:49:29,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 146 transitions, 606 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-19 07:49:29,567 INFO L231 Difference]: Finished difference. Result has 107 places, 102 transitions, 270 flow [2023-11-19 07:49:29,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=107, PETRI_TRANSITIONS=102} [2023-11-19 07:49:29,569 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 5 predicate places. [2023-11-19 07:49:29,569 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 102 transitions, 270 flow [2023-11-19 07:49:29,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:29,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:29,571 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-19 07:49:29,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:49:29,571 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-19 07:49:29,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:29,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1128848291, now seen corresponding path program 1 times [2023-11-19 07:49:29,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:29,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784186040] [2023-11-19 07:49:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:29,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:29,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:29,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784186040] [2023-11-19 07:49:29,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784186040] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:29,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242394694] [2023-11-19 07:49:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:29,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:29,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:29,696 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:29,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:49:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:29,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:49:29,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:29,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:29,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242394694] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:49:29,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:49:29,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-19 07:49:29,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311149087] [2023-11-19 07:49:29,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:49:29,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:49:29,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:29,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:49:29,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:49:29,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 578 [2023-11-19 07:49:29,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 102 transitions, 270 flow. Second operand has 9 states, 9 states have (on average 267.22222222222223) internal successors, (2405), 9 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:29,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:29,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 578 [2023-11-19 07:49:29,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:32,865 INFO L124 PetriNetUnfolderBase]: 15428/26734 cut-off events. [2023-11-19 07:49:32,865 INFO L125 PetriNetUnfolderBase]: For 840/840 co-relation queries the response was YES. [2023-11-19 07:49:32,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51771 conditions, 26734 events. 15428/26734 cut-off events. For 840/840 co-relation queries the response was YES. Maximal size of possible extension queue 987. Compared 215078 event pairs, 14776 based on Foata normal form. 4/13821 useless extension candidates. Maximal degree in co-relation 51759. Up to 23645 conditions per place. [2023-11-19 07:49:32,986 INFO L140 encePairwiseOnDemand]: 574/578 looper letters, 77 selfloop transitions, 8 changer transitions 0/104 dead transitions. [2023-11-19 07:49:32,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 104 transitions, 458 flow [2023-11-19 07:49:32,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:49:32,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:49:32,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2217 transitions. [2023-11-19 07:49:32,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47945501730103807 [2023-11-19 07:49:32,996 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2217 transitions. [2023-11-19 07:49:32,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2217 transitions. [2023-11-19 07:49:32,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:32,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2217 transitions. [2023-11-19 07:49:33,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 277.125) internal successors, (2217), 8 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:33,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 578.0) internal successors, (5202), 9 states have internal predecessors, (5202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:33,018 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 578.0) internal successors, (5202), 9 states have internal predecessors, (5202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:33,018 INFO L175 Difference]: Start difference. First operand has 107 places, 102 transitions, 270 flow. Second operand 8 states and 2217 transitions. [2023-11-19 07:49:33,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 104 transitions, 458 flow [2023-11-19 07:49:33,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 104 transitions, 454 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:33,027 INFO L231 Difference]: Finished difference. Result has 115 places, 103 transitions, 306 flow [2023-11-19 07:49:33,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=306, PETRI_PLACES=115, PETRI_TRANSITIONS=103} [2023-11-19 07:49:33,028 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 13 predicate places. [2023-11-19 07:49:33,028 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 103 transitions, 306 flow [2023-11-19 07:49:33,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 267.22222222222223) internal successors, (2405), 9 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:33,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:33,030 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-19 07:49:33,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:33,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:33,243 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-19 07:49:33,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash 634627167, now seen corresponding path program 2 times [2023-11-19 07:49:33,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:33,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915012559] [2023-11-19 07:49:33,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:33,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:34,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:34,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915012559] [2023-11-19 07:49:34,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915012559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:34,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418785279] [2023-11-19 07:49:34,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:49:34,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:34,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:34,312 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:34,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c71990c1-ed52-47ef-9f2f-a11e16fd5408/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:49:34,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:49:34,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:49:34,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-19 07:49:34,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:34,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:49:34,575 INFO L378 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 [2023-11-19 07:49:34,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:49:34,633 INFO L378 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 [2023-11-19 07:49:34,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:49:34,685 INFO L378 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 [2023-11-19 07:49:34,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:49:34,728 INFO L378 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 [2023-11-19 07:49:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:34,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:34,866 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:34,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2023-11-19 07:49:35,108 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:35,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 70 [2023-11-19 07:49:35,393 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:35,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 76 [2023-11-19 07:49:35,617 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:35,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 82 [2023-11-19 07:49:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:36,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418785279] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:49:36,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:49:36,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-19 07:49:36,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456307935] [2023-11-19 07:49:36,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:49:36,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:49:36,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:36,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:49:36,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272