./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/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_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/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_129c2076-da42-4605-bf3b-29beee430897/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 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:01:49,451 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:01:49,586 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 23:01:49,592 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:01:49,592 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:01:49,620 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:01:49,621 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:01:49,622 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:01:49,623 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:01:49,623 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:01:49,624 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:01:49,625 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:01:49,626 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:01:49,627 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:01:49,627 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:01:49,628 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:01:49,629 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:01:49,629 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:01:49,630 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 23:01:49,631 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 23:01:49,631 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 23:01:49,632 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:01:49,633 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 23:01:49,633 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:01:49,634 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:01:49,634 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:01:49,635 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:01:49,635 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:01:49,636 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:01:49,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:01:49,637 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:01:49,637 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:01:49,638 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:01:49,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:01:49,639 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:01:49,640 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:01:49,640 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:01:49,641 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:01:49,647 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_129c2076-da42-4605-bf3b-29beee430897/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 [2023-11-06 23:01:49,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:01:50,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:01:50,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:01:50,024 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:01:50,025 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:01:50,027 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i [2023-11-06 23:01:53,493 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:01:53,874 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:01:53,875 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i [2023-11-06 23:01:53,896 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/data/cd7b9e1e7/af5bba8b72ce4c50b1d570a89e8c7d21/FLAGba7becc88 [2023-11-06 23:01:53,915 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/data/cd7b9e1e7/af5bba8b72ce4c50b1d570a89e8c7d21 [2023-11-06 23:01:53,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:01:53,920 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:01:53,922 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:01:53,922 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:01:53,929 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:01:53,930 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:53" (1/1) ... [2023-11-06 23:01:53,932 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cf152b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:53, skipping insertion in model container [2023-11-06 23:01:53,933 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:53" (1/1) ... [2023-11-06 23:01:54,021 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:01:54,463 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:01:54,482 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:01:54,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:01:54,590 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:01:54,590 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:54 WrapperNode [2023-11-06 23:01:54,590 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:01:54,592 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:01:54,592 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:01:54,592 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:01:54,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:54" (1/1) ... [2023-11-06 23:01:54,647 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:54" (1/1) ... [2023-11-06 23:01:54,690 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2023-11-06 23:01:54,692 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:01:54,693 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:01:54,693 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:01:54,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:01:54,706 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:54" (1/1) ... [2023-11-06 23:01:54,707 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:54" (1/1) ... [2023-11-06 23:01:54,727 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:54" (1/1) ... [2023-11-06 23:01:54,727 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:54" (1/1) ... [2023-11-06 23:01:54,755 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:54" (1/1) ... [2023-11-06 23:01:54,761 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:54" (1/1) ... [2023-11-06 23:01:54,766 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:54" (1/1) ... [2023-11-06 23:01:54,769 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:54" (1/1) ... [2023-11-06 23:01:54,771 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:01:54,772 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:01:54,772 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:01:54,773 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:01:54,773 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:54" (1/1) ... [2023-11-06 23:01:54,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:01:54,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:54,828 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:01:54,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:01:54,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:01:54,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:01:54,886 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 23:01:54,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:01:54,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:01:54,888 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 23:01:54,888 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 23:01:54,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:01:54,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:01:54,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:01:54,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:01:54,891 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 23:01:55,113 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:01:55,118 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:01:55,505 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:01:55,515 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:01:55,516 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-06 23:01:55,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:55 BoogieIcfgContainer [2023-11-06 23:01:55,519 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:01:55,528 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:01:55,528 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:01:55,532 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:01:55,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:01:53" (1/3) ... [2023-11-06 23:01:55,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b12a6cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:55, skipping insertion in model container [2023-11-06 23:01:55,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:54" (2/3) ... [2023-11-06 23:01:55,534 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b12a6cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:55, skipping insertion in model container [2023-11-06 23:01:55,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:55" (3/3) ... [2023-11-06 23:01:55,536 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_37-indirect_racing.i [2023-11-06 23:01:55,561 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:01:55,562 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-06 23:01:55,562 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:01:55,657 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 23:01:55,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 135 transitions, 277 flow [2023-11-06 23:01:55,831 INFO L124 PetriNetUnfolderBase]: 19/186 cut-off events. [2023-11-06 23:01:55,831 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 23:01:55,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 186 events. 19/186 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 615 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 96. Up to 4 conditions per place. [2023-11-06 23:01:55,840 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 135 transitions, 277 flow [2023-11-06 23:01:55,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 135 transitions, 277 flow [2023-11-06 23:01:55,856 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:01:55,868 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 135 transitions, 277 flow [2023-11-06 23:01:55,872 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 135 transitions, 277 flow [2023-11-06 23:01:55,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 135 transitions, 277 flow [2023-11-06 23:01:55,964 INFO L124 PetriNetUnfolderBase]: 19/186 cut-off events. [2023-11-06 23:01:55,964 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 23:01:55,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 186 events. 19/186 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 615 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 96. Up to 4 conditions per place. [2023-11-06 23:01:55,972 INFO L119 LiptonReduction]: Number of co-enabled transitions 4560 [2023-11-06 23:02:01,334 INFO L134 LiptonReduction]: Checked pairs total: 8650 [2023-11-06 23:02:01,334 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-11-06 23:02:01,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:02:01,389 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;@3ea6caff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:02:01,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-11-06 23:02:01,392 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:02:01,393 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-06 23:02:01,393 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:02:01,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:01,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:02:01,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-06 23:02:01,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:01,401 INFO L85 PathProgramCache]: Analyzing trace with hash 16662, now seen corresponding path program 1 times [2023-11-06 23:02:01,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:01,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599150438] [2023-11-06 23:02:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:01,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:01,756 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 23:02:01,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:01,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599150438] [2023-11-06 23:02:01,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599150438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:01,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:01,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:02:01,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800778548] [2023-11-06 23:02:01,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:01,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:01,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:01,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:01,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:01,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 259 [2023-11-06 23:02:01,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 49 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 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 23:02:01,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:01,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 259 [2023-11-06 23:02:01,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:02,203 INFO L124 PetriNetUnfolderBase]: 169/413 cut-off events. [2023-11-06 23:02:02,204 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 23:02:02,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 413 events. 169/413 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2188 event pairs, 144 based on Foata normal form. 15/281 useless extension candidates. Maximal degree in co-relation 753. Up to 327 conditions per place. [2023-11-06 23:02:02,211 INFO L140 encePairwiseOnDemand]: 243/259 looper letters, 39 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-11-06 23:02:02,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 48 transitions, 187 flow [2023-11-06 23:02:02,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:02,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-11-06 23:02:02,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096525096525096 [2023-11-06 23:02:02,233 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-11-06 23:02:02,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-11-06 23:02:02,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:02,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-11-06 23:02:02,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 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 23:02:02,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 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 23:02:02,252 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 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 23:02:02,255 INFO L175 Difference]: Start difference. First operand has 42 places, 49 transitions, 105 flow. Second operand 3 states and 396 transitions. [2023-11-06 23:02:02,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 48 transitions, 187 flow [2023-11-06 23:02:02,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 48 transitions, 187 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:02:02,262 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 85 flow [2023-11-06 23:02:02,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-11-06 23:02:02,270 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2023-11-06 23:02:02,270 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 85 flow [2023-11-06 23:02:02,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 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 23:02:02,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:02,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:02:02,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:02:02,272 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-06 23:02:02,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:02,272 INFO L85 PathProgramCache]: Analyzing trace with hash 16663, now seen corresponding path program 1 times [2023-11-06 23:02:02,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:02,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085443573] [2023-11-06 23:02:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:02,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:02,446 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 23:02:02,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:02,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085443573] [2023-11-06 23:02:02,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085443573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:02,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:02,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:02:02,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269765500] [2023-11-06 23:02:02,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:02,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:02,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:02,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:02,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:02,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 259 [2023-11-06 23:02:02,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 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 23:02:02,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:02,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 259 [2023-11-06 23:02:02,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:02,711 INFO L124 PetriNetUnfolderBase]: 169/416 cut-off events. [2023-11-06 23:02:02,711 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-06 23:02:02,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 830 conditions, 416 events. 169/416 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2125 event pairs, 143 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 784. Up to 364 conditions per place. [2023-11-06 23:02:02,719 INFO L140 encePairwiseOnDemand]: 255/259 looper letters, 41 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-11-06 23:02:02,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 201 flow [2023-11-06 23:02:02,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:02,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:02,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 384 transitions. [2023-11-06 23:02:02,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4942084942084942 [2023-11-06 23:02:02,728 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 384 transitions. [2023-11-06 23:02:02,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 384 transitions. [2023-11-06 23:02:02,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:02,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 384 transitions. [2023-11-06 23:02:02,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 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 23:02:02,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 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 23:02:02,740 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 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 23:02:02,740 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 85 flow. Second operand 3 states and 384 transitions. [2023-11-06 23:02:02,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 201 flow [2023-11-06 23:02:02,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 195 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:02:02,745 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 94 flow [2023-11-06 23:02:02,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-11-06 23:02:02,748 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-11-06 23:02:02,749 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 94 flow [2023-11-06 23:02:02,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 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 23:02:02,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:02,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:02:02,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:02:02,755 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-06 23:02:02,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:02,760 INFO L85 PathProgramCache]: Analyzing trace with hash 516348, now seen corresponding path program 1 times [2023-11-06 23:02:02,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:02,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768774610] [2023-11-06 23:02:02,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:02,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:02,854 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 23:02:02,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:02,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768774610] [2023-11-06 23:02:02,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768774610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:02,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:02,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:02:02,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111437950] [2023-11-06 23:02:02,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:02,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:02,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:02,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:02,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:02,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 259 [2023-11-06 23:02:02,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 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 23:02:02,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:02,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 259 [2023-11-06 23:02:02,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:03,016 INFO L124 PetriNetUnfolderBase]: 168/389 cut-off events. [2023-11-06 23:02:03,016 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-06 23:02:03,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821 conditions, 389 events. 168/389 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2140 event pairs, 0 based on Foata normal form. 1/263 useless extension candidates. Maximal degree in co-relation 781. Up to 357 conditions per place. [2023-11-06 23:02:03,020 INFO L140 encePairwiseOnDemand]: 256/259 looper letters, 41 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-11-06 23:02:03,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 201 flow [2023-11-06 23:02:03,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2023-11-06 23:02:03,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967824967824968 [2023-11-06 23:02:03,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2023-11-06 23:02:03,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2023-11-06 23:02:03,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:03,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2023-11-06 23:02:03,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 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 23:02:03,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 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 23:02:03,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 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 23:02:03,029 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 94 flow. Second operand 3 states and 386 transitions. [2023-11-06 23:02:03,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 201 flow [2023-11-06 23:02:03,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 197 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:02:03,032 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 89 flow [2023-11-06 23:02:03,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-11-06 23:02:03,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-11-06 23:02:03,033 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 89 flow [2023-11-06 23:02:03,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 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 23:02:03,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:03,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:02:03,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:02:03,034 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-06 23:02:03,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:03,035 INFO L85 PathProgramCache]: Analyzing trace with hash 496805148, now seen corresponding path program 1 times [2023-11-06 23:02:03,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:03,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487459670] [2023-11-06 23:02:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:03,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:03,217 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 23:02:03,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:03,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487459670] [2023-11-06 23:02:03,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487459670] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:03,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128898695] [2023-11-06 23:02:03,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:03,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:03,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:03,223 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:03,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:02:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:03,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:02:03,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:03,458 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:02:03,533 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 23:02:03,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:03,609 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 23:02:03,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128898695] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:03,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:03,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-06 23:02:03,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599473149] [2023-11-06 23:02:03,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:03,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:02:03,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:03,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:02:03,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:02:03,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 259 [2023-11-06 23:02:03,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 89 flow. Second operand has 8 states, 8 states have (on average 111.875) internal successors, (895), 8 states have internal predecessors, (895), 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 23:02:03,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:03,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 259 [2023-11-06 23:02:03,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:04,011 INFO L124 PetriNetUnfolderBase]: 24/83 cut-off events. [2023-11-06 23:02:04,012 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-06 23:02:04,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 83 events. 24/83 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 270 event pairs, 0 based on Foata normal form. 13/89 useless extension candidates. Maximal degree in co-relation 155. Up to 50 conditions per place. [2023-11-06 23:02:04,013 INFO L140 encePairwiseOnDemand]: 255/259 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-11-06 23:02:04,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 138 flow [2023-11-06 23:02:04,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:02:04,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:02:04,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 471 transitions. [2023-11-06 23:02:04,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546332046332046 [2023-11-06 23:02:04,017 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 471 transitions. [2023-11-06 23:02:04,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 471 transitions. [2023-11-06 23:02:04,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:04,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 471 transitions. [2023-11-06 23:02:04,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 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 23:02:04,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 259.0) internal successors, (1295), 5 states have internal predecessors, (1295), 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 23:02:04,025 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 259.0) internal successors, (1295), 5 states have internal predecessors, (1295), 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 23:02:04,025 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 89 flow. Second operand 4 states and 471 transitions. [2023-11-06 23:02:04,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 138 flow [2023-11-06 23:02:04,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 132 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 23:02:04,028 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 52 flow [2023-11-06 23:02:04,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-11-06 23:02:04,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -14 predicate places. [2023-11-06 23:02:04,030 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 52 flow [2023-11-06 23:02:04,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 111.875) internal successors, (895), 8 states have internal predecessors, (895), 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 23:02:04,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:04,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:02:04,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:04,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:04,238 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-06 23:02:04,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:04,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1778925368, now seen corresponding path program 1 times [2023-11-06 23:02:04,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:04,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163769106] [2023-11-06 23:02:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:04,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:04,493 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 23:02:04,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:04,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163769106] [2023-11-06 23:02:04,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163769106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:04,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:04,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:02:04,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273374349] [2023-11-06 23:02:04,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:04,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:02:04,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:04,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:02:04,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:02:04,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 259 [2023-11-06 23:02:04,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 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 23:02:04,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:04,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 259 [2023-11-06 23:02:04,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:04,639 INFO L124 PetriNetUnfolderBase]: 20/68 cut-off events. [2023-11-06 23:02:04,639 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-06 23:02:04,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 68 events. 20/68 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 161 event pairs, 20 based on Foata normal form. 2/65 useless extension candidates. Maximal degree in co-relation 124. Up to 55 conditions per place. [2023-11-06 23:02:04,641 INFO L140 encePairwiseOnDemand]: 256/259 looper letters, 13 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-11-06 23:02:04,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 76 flow [2023-11-06 23:02:04,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:04,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:04,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2023-11-06 23:02:04,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453024453024453 [2023-11-06 23:02:04,643 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2023-11-06 23:02:04,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2023-11-06 23:02:04,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:04,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2023-11-06 23:02:04,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 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 23:02:04,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 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 23:02:04,649 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 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 23:02:04,649 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 52 flow. Second operand 3 states and 346 transitions. [2023-11-06 23:02:04,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 76 flow [2023-11-06 23:02:04,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 20 transitions, 73 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:02:04,651 INFO L231 Difference]: Finished difference. Result has 26 places, 20 transitions, 47 flow [2023-11-06 23:02:04,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=26, PETRI_TRANSITIONS=20} [2023-11-06 23:02:04,654 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -16 predicate places. [2023-11-06 23:02:04,655 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 20 transitions, 47 flow [2023-11-06 23:02:04,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 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 23:02:04,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:04,656 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 23:02:04,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:02:04,656 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-06 23:02:04,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:04,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1778909199, now seen corresponding path program 1 times [2023-11-06 23:02:04,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:04,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142057347] [2023-11-06 23:02:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:04,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:02:04,688 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 23:02:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:02:04,728 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 23:02:04,728 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 23:02:04,730 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2023-11-06 23:02:04,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2023-11-06 23:02:04,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2023-11-06 23:02:04,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2023-11-06 23:02:04,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2023-11-06 23:02:04,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2023-11-06 23:02:04,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2023-11-06 23:02:04,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (17 of 25 remaining) [2023-11-06 23:02:04,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (16 of 25 remaining) [2023-11-06 23:02:04,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2023-11-06 23:02:04,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2023-11-06 23:02:04,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2023-11-06 23:02:04,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2023-11-06 23:02:04,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2023-11-06 23:02:04,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2023-11-06 23:02:04,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2023-11-06 23:02:04,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2023-11-06 23:02:04,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2023-11-06 23:02:04,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2023-11-06 23:02:04,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2023-11-06 23:02:04,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2023-11-06 23:02:04,740 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2023-11-06 23:02:04,740 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2023-11-06 23:02:04,740 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2023-11-06 23:02:04,740 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2023-11-06 23:02:04,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 23:02:04,741 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-06 23:02:04,744 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 23:02:04,744 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 23:02:04,789 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 23:02:04,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 177 transitions, 370 flow [2023-11-06 23:02:04,865 INFO L124 PetriNetUnfolderBase]: 34/310 cut-off events. [2023-11-06 23:02:04,865 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 23:02:04,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 310 events. 34/310 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1176 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 188. Up to 8 conditions per place. [2023-11-06 23:02:04,868 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 177 transitions, 370 flow [2023-11-06 23:02:04,873 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 177 transitions, 370 flow [2023-11-06 23:02:04,873 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:02:04,873 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 177 transitions, 370 flow [2023-11-06 23:02:04,874 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 177 transitions, 370 flow [2023-11-06 23:02:04,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 177 transitions, 370 flow [2023-11-06 23:02:04,921 INFO L124 PetriNetUnfolderBase]: 34/310 cut-off events. [2023-11-06 23:02:04,921 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 23:02:04,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 310 events. 34/310 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1176 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 188. Up to 8 conditions per place. [2023-11-06 23:02:04,936 INFO L119 LiptonReduction]: Number of co-enabled transitions 13200 [2023-11-06 23:02:10,473 INFO L134 LiptonReduction]: Checked pairs total: 35109 [2023-11-06 23:02:10,473 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-11-06 23:02:10,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:02:10,478 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;@3ea6caff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:02:10,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2023-11-06 23:02:10,480 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:02:10,480 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-06 23:02:10,481 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:02:10,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:10,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:02:10,481 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-06 23:02:10,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:10,482 INFO L85 PathProgramCache]: Analyzing trace with hash 28781, now seen corresponding path program 1 times [2023-11-06 23:02:10,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:10,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442525039] [2023-11-06 23:02:10,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:10,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:10,566 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 23:02:10,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:10,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442525039] [2023-11-06 23:02:10,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442525039] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:10,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:10,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:02:10,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631142021] [2023-11-06 23:02:10,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:10,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:10,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:10,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:10,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:10,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 339 [2023-11-06 23:02:10,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 78 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 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 23:02:10,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:10,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 339 [2023-11-06 23:02:10,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:12,713 INFO L124 PetriNetUnfolderBase]: 6333/10703 cut-off events. [2023-11-06 23:02:12,713 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-11-06 23:02:12,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20806 conditions, 10703 events. 6333/10703 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 78575 event pairs, 3003 based on Foata normal form. 501/6855 useless extension candidates. Maximal degree in co-relation 2376. Up to 10009 conditions per place. [2023-11-06 23:02:12,838 INFO L140 encePairwiseOnDemand]: 316/339 looper letters, 62 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-11-06 23:02:12,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 75 transitions, 294 flow [2023-11-06 23:02:12,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:12,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 534 transitions. [2023-11-06 23:02:12,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5250737463126843 [2023-11-06 23:02:12,845 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 534 transitions. [2023-11-06 23:02:12,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 534 transitions. [2023-11-06 23:02:12,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:12,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 534 transitions. [2023-11-06 23:02:12,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 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 23:02:12,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 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 23:02:12,861 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 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 23:02:12,862 INFO L175 Difference]: Start difference. First operand has 66 places, 78 transitions, 172 flow. Second operand 3 states and 534 transitions. [2023-11-06 23:02:12,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 75 transitions, 294 flow [2023-11-06 23:02:12,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 75 transitions, 294 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:02:12,870 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 148 flow [2023-11-06 23:02:12,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2023-11-06 23:02:12,874 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2023-11-06 23:02:12,874 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 148 flow [2023-11-06 23:02:12,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 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 23:02:12,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:12,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:02:12,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 23:02:12,876 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-06 23:02:12,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:12,877 INFO L85 PathProgramCache]: Analyzing trace with hash 28782, now seen corresponding path program 1 times [2023-11-06 23:02:12,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:12,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124921240] [2023-11-06 23:02:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:12,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:12,925 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 23:02:12,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:12,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124921240] [2023-11-06 23:02:12,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124921240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:12,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:12,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:02:12,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420387539] [2023-11-06 23:02:12,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:12,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:12,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:12,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:12,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:13,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 339 [2023-11-06 23:02:13,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 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 23:02:13,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:13,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 339 [2023-11-06 23:02:13,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:14,558 INFO L124 PetriNetUnfolderBase]: 5566/9243 cut-off events. [2023-11-06 23:02:14,559 INFO L125 PetriNetUnfolderBase]: For 497/497 co-relation queries the response was YES. [2023-11-06 23:02:14,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18790 conditions, 9243 events. 5566/9243 cut-off events. For 497/497 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 65502 event pairs, 4771 based on Foata normal form. 0/5841 useless extension candidates. Maximal degree in co-relation 18688. Up to 7592 conditions per place. [2023-11-06 23:02:14,647 INFO L140 encePairwiseOnDemand]: 334/339 looper letters, 70 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2023-11-06 23:02:14,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 84 transitions, 342 flow [2023-11-06 23:02:14,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:14,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:14,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-11-06 23:02:14,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5004916420845624 [2023-11-06 23:02:14,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-11-06 23:02:14,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-11-06 23:02:14,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:14,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-11-06 23:02:14,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 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 23:02:14,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 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 23:02:14,660 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 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 23:02:14,660 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 148 flow. Second operand 3 states and 509 transitions. [2023-11-06 23:02:14,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 84 transitions, 342 flow [2023-11-06 23:02:14,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 84 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:02:14,669 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 148 flow [2023-11-06 23:02:14,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-11-06 23:02:14,671 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2023-11-06 23:02:14,672 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 148 flow [2023-11-06 23:02:14,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 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 23:02:14,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:14,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:02:14,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 23:02:14,673 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-06 23:02:14,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:14,674 INFO L85 PathProgramCache]: Analyzing trace with hash 833806391, now seen corresponding path program 1 times [2023-11-06 23:02:14,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:14,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665689935] [2023-11-06 23:02:14,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:14,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:14,851 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 23:02:14,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:14,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665689935] [2023-11-06 23:02:14,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665689935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:14,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:14,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:02:14,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487652408] [2023-11-06 23:02:14,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:14,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:02:14,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:14,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:02:14,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:02:15,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 339 [2023-11-06 23:02:15,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 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 23:02:15,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:15,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 339 [2023-11-06 23:02:15,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:16,121 INFO L124 PetriNetUnfolderBase]: 4072/6859 cut-off events. [2023-11-06 23:02:16,121 INFO L125 PetriNetUnfolderBase]: For 487/487 co-relation queries the response was YES. [2023-11-06 23:02:16,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14241 conditions, 6859 events. 4072/6859 cut-off events. For 487/487 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 46482 event pairs, 3487 based on Foata normal form. 382/5029 useless extension candidates. Maximal degree in co-relation 12073. Up to 5594 conditions per place. [2023-11-06 23:02:16,177 INFO L140 encePairwiseOnDemand]: 332/339 looper letters, 62 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2023-11-06 23:02:16,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 76 transitions, 314 flow [2023-11-06 23:02:16,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:02:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:02:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 632 transitions. [2023-11-06 23:02:16,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46607669616519176 [2023-11-06 23:02:16,182 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 632 transitions. [2023-11-06 23:02:16,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 632 transitions. [2023-11-06 23:02:16,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:16,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 632 transitions. [2023-11-06 23:02:16,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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 23:02:16,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 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 23:02:16,191 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 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 23:02:16,191 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 148 flow. Second operand 4 states and 632 transitions. [2023-11-06 23:02:16,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 76 transitions, 314 flow [2023-11-06 23:02:16,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:02:16,206 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 140 flow [2023-11-06 23:02:16,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2023-11-06 23:02:16,207 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -5 predicate places. [2023-11-06 23:02:16,207 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 140 flow [2023-11-06 23:02:16,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 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 23:02:16,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:16,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:02:16,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 23:02:16,209 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-06 23:02:16,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:16,209 INFO L85 PathProgramCache]: Analyzing trace with hash 833605675, now seen corresponding path program 1 times [2023-11-06 23:02:16,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:16,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385839176] [2023-11-06 23:02:16,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:16,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:16,307 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 23:02:16,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:16,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385839176] [2023-11-06 23:02:16,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385839176] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:16,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131607948] [2023-11-06 23:02:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:16,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:16,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:16,311 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:16,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:02:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:16,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:02:16,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:16,573 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:02:16,639 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 23:02:16,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:16,705 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 23:02:16,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131607948] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:16,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:16,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-06 23:02:16,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318640361] [2023-11-06 23:02:16,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:16,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:02:16,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:16,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:02:16,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:02:17,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 339 [2023-11-06 23:02:17,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 140 flow. Second operand has 8 states, 8 states have (on average 145.875) internal successors, (1167), 8 states have internal predecessors, (1167), 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 23:02:17,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:17,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 339 [2023-11-06 23:02:17,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:18,265 INFO L124 PetriNetUnfolderBase]: 3719/6157 cut-off events. [2023-11-06 23:02:18,265 INFO L125 PetriNetUnfolderBase]: For 338/338 co-relation queries the response was YES. [2023-11-06 23:02:18,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12790 conditions, 6157 events. 3719/6157 cut-off events. For 338/338 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 42526 event pairs, 1 based on Foata normal form. 12/4332 useless extension candidates. Maximal degree in co-relation 10622. Up to 4772 conditions per place. [2023-11-06 23:02:18,324 INFO L140 encePairwiseOnDemand]: 335/339 looper letters, 95 selfloop transitions, 4 changer transitions 0/110 dead transitions. [2023-11-06 23:02:18,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 110 transitions, 448 flow [2023-11-06 23:02:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:02:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:02:18,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 822 transitions. [2023-11-06 23:02:18,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4849557522123894 [2023-11-06 23:02:18,330 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 822 transitions. [2023-11-06 23:02:18,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 822 transitions. [2023-11-06 23:02:18,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:18,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 822 transitions. [2023-11-06 23:02:18,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.4) internal successors, (822), 5 states have internal predecessors, (822), 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 23:02:18,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 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 23:02:18,344 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 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 23:02:18,344 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 140 flow. Second operand 5 states and 822 transitions. [2023-11-06 23:02:18,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 110 transitions, 448 flow [2023-11-06 23:02:18,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 110 transitions, 444 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:02:18,390 INFO L231 Difference]: Finished difference. Result has 62 places, 53 transitions, 140 flow [2023-11-06 23:02:18,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=62, PETRI_TRANSITIONS=53} [2023-11-06 23:02:18,392 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -4 predicate places. [2023-11-06 23:02:18,392 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 53 transitions, 140 flow [2023-11-06 23:02:18,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.875) internal successors, (1167), 8 states have internal predecessors, (1167), 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 23:02:18,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:18,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:18,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:18,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:02:18,601 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-06 23:02:18,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:18,601 INFO L85 PathProgramCache]: Analyzing trace with hash 78193036, now seen corresponding path program 1 times [2023-11-06 23:02:18,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:18,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352908967] [2023-11-06 23:02:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:18,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:18,787 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 23:02:18,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:18,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352908967] [2023-11-06 23:02:18,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352908967] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:18,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:18,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:02:18,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354186512] [2023-11-06 23:02:18,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:18,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:02:18,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:18,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:02:18,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:02:19,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 339 [2023-11-06 23:02:19,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 53 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 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 23:02:19,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:19,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 339 [2023-11-06 23:02:19,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:19,808 INFO L124 PetriNetUnfolderBase]: 2855/5118 cut-off events. [2023-11-06 23:02:19,809 INFO L125 PetriNetUnfolderBase]: For 680/680 co-relation queries the response was YES. [2023-11-06 23:02:19,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10785 conditions, 5118 events. 2855/5118 cut-off events. For 680/680 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 33042 event pairs, 2193 based on Foata normal form. 0/4174 useless extension candidates. Maximal degree in co-relation 8362. Up to 3477 conditions per place. [2023-11-06 23:02:19,854 INFO L140 encePairwiseOnDemand]: 320/339 looper letters, 71 selfloop transitions, 11 changer transitions 0/89 dead transitions. [2023-11-06 23:02:19,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 89 transitions, 376 flow [2023-11-06 23:02:19,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:02:19,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:02:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 609 transitions. [2023-11-06 23:02:19,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4491150442477876 [2023-11-06 23:02:19,860 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 609 transitions. [2023-11-06 23:02:19,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 609 transitions. [2023-11-06 23:02:19,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:19,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 609 transitions. [2023-11-06 23:02:19,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 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 23:02:19,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 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 23:02:19,871 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 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 23:02:19,871 INFO L175 Difference]: Start difference. First operand has 62 places, 53 transitions, 140 flow. Second operand 4 states and 609 transitions. [2023-11-06 23:02:19,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 89 transitions, 376 flow [2023-11-06 23:02:19,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 89 transitions, 366 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-06 23:02:19,877 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 238 flow [2023-11-06 23:02:19,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2023-11-06 23:02:19,878 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2023-11-06 23:02:19,878 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 238 flow [2023-11-06 23:02:19,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 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 23:02:19,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:19,879 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 23:02:19,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 23:02:19,880 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-06 23:02:19,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:19,881 INFO L85 PathProgramCache]: Analyzing trace with hash -391833927, now seen corresponding path program 1 times [2023-11-06 23:02:19,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:19,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095868061] [2023-11-06 23:02:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:19,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:02:19,901 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 23:02:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:02:19,922 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 23:02:19,923 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 23:02:19,923 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2023-11-06 23:02:19,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2023-11-06 23:02:19,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2023-11-06 23:02:19,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2023-11-06 23:02:19,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2023-11-06 23:02:19,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2023-11-06 23:02:19,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2023-11-06 23:02:19,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (25 of 33 remaining) [2023-11-06 23:02:19,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (24 of 33 remaining) [2023-11-06 23:02:19,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2023-11-06 23:02:19,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2023-11-06 23:02:19,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2023-11-06 23:02:19,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2023-11-06 23:02:19,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2023-11-06 23:02:19,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2023-11-06 23:02:19,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2023-11-06 23:02:19,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2023-11-06 23:02:19,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2023-11-06 23:02:19,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2023-11-06 23:02:19,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2023-11-06 23:02:19,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2023-11-06 23:02:19,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2023-11-06 23:02:19,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2023-11-06 23:02:19,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2023-11-06 23:02:19,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2023-11-06 23:02:19,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2023-11-06 23:02:19,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2023-11-06 23:02:19,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2023-11-06 23:02:19,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2023-11-06 23:02:19,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2023-11-06 23:02:19,932 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2023-11-06 23:02:19,932 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2023-11-06 23:02:19,932 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 33 remaining) [2023-11-06 23:02:19,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 23:02:19,933 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-06 23:02:19,934 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 23:02:19,934 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 23:02:19,976 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 23:02:19,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 219 transitions, 465 flow [2023-11-06 23:02:20,103 INFO L124 PetriNetUnfolderBase]: 54/479 cut-off events. [2023-11-06 23:02:20,104 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 23:02:20,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 479 events. 54/479 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1985 event pairs, 1 based on Foata normal form. 0/353 useless extension candidates. Maximal degree in co-relation 318. Up to 16 conditions per place. [2023-11-06 23:02:20,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 219 transitions, 465 flow [2023-11-06 23:02:20,118 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 219 transitions, 465 flow [2023-11-06 23:02:20,119 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:02:20,119 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 219 transitions, 465 flow [2023-11-06 23:02:20,120 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 219 transitions, 465 flow [2023-11-06 23:02:20,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 219 transitions, 465 flow [2023-11-06 23:02:20,243 INFO L124 PetriNetUnfolderBase]: 54/479 cut-off events. [2023-11-06 23:02:20,243 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 23:02:20,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 479 events. 54/479 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1985 event pairs, 1 based on Foata normal form. 0/353 useless extension candidates. Maximal degree in co-relation 318. Up to 16 conditions per place. [2023-11-06 23:02:20,285 INFO L119 LiptonReduction]: Number of co-enabled transitions 24960 [2023-11-06 23:02:26,740 INFO L134 LiptonReduction]: Checked pairs total: 64911 [2023-11-06 23:02:26,741 INFO L136 LiptonReduction]: Total number of compositions: 179 [2023-11-06 23:02:26,743 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:02:26,746 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;@3ea6caff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:02:26,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-11-06 23:02:26,748 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:02:26,748 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-06 23:02:26,749 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:02:26,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:26,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:02:26,749 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-06 23:02:26,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:26,750 INFO L85 PathProgramCache]: Analyzing trace with hash 42962, now seen corresponding path program 1 times [2023-11-06 23:02:26,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:26,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105650526] [2023-11-06 23:02:26,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:26,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:26,823 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 23:02:26,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:26,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105650526] [2023-11-06 23:02:26,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105650526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:26,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:26,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:02:26,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971624977] [2023-11-06 23:02:26,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:26,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:26,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:26,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:26,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:26,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 398 [2023-11-06 23:02:26,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 105 transitions, 237 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 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 23:02:26,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:26,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 398 [2023-11-06 23:02:26,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:46,646 INFO L124 PetriNetUnfolderBase]: 120489/180613 cut-off events. [2023-11-06 23:02:46,647 INFO L125 PetriNetUnfolderBase]: For 2290/2290 co-relation queries the response was YES. [2023-11-06 23:02:46,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348894 conditions, 180613 events. 120489/180613 cut-off events. For 2290/2290 co-relation queries the response was YES. Maximal size of possible extension queue 5764. Compared 1558890 event pairs, 78469 based on Foata normal form. 9950/123780 useless extension candidates. Maximal degree in co-relation 24465. Up to 166872 conditions per place. [2023-11-06 23:02:48,271 INFO L140 encePairwiseOnDemand]: 367/398 looper letters, 75 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-11-06 23:02:48,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 94 transitions, 369 flow [2023-11-06 23:02:48,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:48,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 657 transitions. [2023-11-06 23:02:48,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550251256281407 [2023-11-06 23:02:48,277 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 657 transitions. [2023-11-06 23:02:48,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 657 transitions. [2023-11-06 23:02:48,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:48,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 657 transitions. [2023-11-06 23:02:48,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 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 23:02:48,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 23:02:48,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 23:02:48,286 INFO L175 Difference]: Start difference. First operand has 88 places, 105 transitions, 237 flow. Second operand 3 states and 657 transitions. [2023-11-06 23:02:48,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 94 transitions, 369 flow [2023-11-06 23:02:48,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 94 transitions, 369 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:02:48,291 INFO L231 Difference]: Finished difference. Result has 85 places, 79 transitions, 197 flow [2023-11-06 23:02:48,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2023-11-06 23:02:48,293 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -3 predicate places. [2023-11-06 23:02:48,293 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 197 flow [2023-11-06 23:02:48,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 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 23:02:48,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:48,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:02:48,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 23:02:48,295 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-06 23:02:48,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:48,295 INFO L85 PathProgramCache]: Analyzing trace with hash 42961, now seen corresponding path program 1 times [2023-11-06 23:02:48,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:48,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117348204] [2023-11-06 23:02:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:48,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:48,329 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 23:02:48,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:48,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117348204] [2023-11-06 23:02:48,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117348204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:48,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:48,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:02:48,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298920852] [2023-11-06 23:02:48,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:48,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:48,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:48,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:48,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:48,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 398 [2023-11-06 23:02:48,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 79 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 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 23:02:48,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:48,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 398 [2023-11-06 23:02:48,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:03,114 INFO L124 PetriNetUnfolderBase]: 105986/156453 cut-off events. [2023-11-06 23:03:03,114 INFO L125 PetriNetUnfolderBase]: For 7221/7221 co-relation queries the response was YES. [2023-11-06 23:03:03,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312431 conditions, 156453 events. 105986/156453 cut-off events. For 7221/7221 co-relation queries the response was YES. Maximal size of possible extension queue 4962. Compared 1307881 event pairs, 90585 based on Foata normal form. 0/102924 useless extension candidates. Maximal degree in co-relation 312328. Up to 125826 conditions per place. [2023-11-06 23:03:04,503 INFO L140 encePairwiseOnDemand]: 393/398 looper letters, 94 selfloop transitions, 3 changer transitions 0/114 dead transitions. [2023-11-06 23:03:04,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 114 transitions, 461 flow [2023-11-06 23:03:04,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:03:04,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:03:04,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 635 transitions. [2023-11-06 23:03:04,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5318257956448911 [2023-11-06 23:03:04,508 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 635 transitions. [2023-11-06 23:03:04,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 635 transitions. [2023-11-06 23:03:04,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:04,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 635 transitions. [2023-11-06 23:03:04,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 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 23:03:04,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 23:03:04,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 23:03:04,516 INFO L175 Difference]: Start difference. First operand has 85 places, 79 transitions, 197 flow. Second operand 3 states and 635 transitions. [2023-11-06 23:03:04,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 114 transitions, 461 flow [2023-11-06 23:03:04,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 114 transitions, 459 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:03:04,529 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 197 flow [2023-11-06 23:03:04,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2023-11-06 23:03:04,530 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -4 predicate places. [2023-11-06 23:03:04,530 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 197 flow [2023-11-06 23:03:04,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 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 23:03:04,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:04,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:03:04,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 23:03:04,532 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-06 23:03:04,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:04,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1054382469, now seen corresponding path program 1 times [2023-11-06 23:03:04,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:04,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209224558] [2023-11-06 23:03:04,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:04,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:04,611 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 23:03:04,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:04,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209224558] [2023-11-06 23:03:04,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209224558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:04,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445917518] [2023-11-06 23:03:04,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:04,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:04,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:04,614 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:04,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129c2076-da42-4605-bf3b-29beee430897/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:03:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:04,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:03:04,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:04,731 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:03:04,767 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 23:03:04,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:04,813 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 23:03:04,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445917518] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:04,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:04,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-06 23:03:04,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982078638] [2023-11-06 23:03:04,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:04,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:03:04,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:04,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:03:04,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:03:05,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 398 [2023-11-06 23:03:05,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 197 flow. Second operand has 7 states, 7 states have (on average 179.71428571428572) internal successors, (1258), 7 states have internal predecessors, (1258), 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 23:03:05,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:05,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 398 [2023-11-06 23:03:05,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand