./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:32:50,062 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:32:50,178 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:32:50,185 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:32:50,185 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:32:50,222 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:32:50,223 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:32:50,224 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:32:50,225 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:32:50,230 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:32:50,232 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:32:50,232 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:32:50,233 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:32:50,234 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:32:50,235 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:32:50,235 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:32:50,236 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:32:50,236 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:32:50,237 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:32:50,237 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:32:50,238 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:32:50,239 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:32:50,239 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:32:50,239 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:32:50,240 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:32:50,240 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:32:50,241 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:32:50,242 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:32:50,242 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:32:50,243 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:32:50,243 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:32:50,244 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:32:50,244 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:32:50,245 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:32:50,245 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:32:50,245 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:32:50,245 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:32:50,246 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:32:50,246 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_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 [2023-11-19 07:32:50,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:32:50,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:32:50,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:32:50,634 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:32:50,635 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:32:50,636 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i [2023-11-19 07:32:53,805 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:32:54,086 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:32:54,086 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i [2023-11-19 07:32:54,107 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/data/3a4c51a07/5309fd2931fc494980a812e9ce755476/FLAG984a6877d [2023-11-19 07:32:54,123 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/data/3a4c51a07/5309fd2931fc494980a812e9ce755476 [2023-11-19 07:32:54,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:32:54,127 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:32:54,129 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:32:54,129 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:32:54,141 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:32:54,142 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:32:54" (1/1) ... [2023-11-19 07:32:54,143 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b22a0ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:54, skipping insertion in model container [2023-11-19 07:32:54,143 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:32:54" (1/1) ... [2023-11-19 07:32:54,214 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:32:54,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:32:54,627 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:32:54,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:32:54,718 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:32:54,719 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:54 WrapperNode [2023-11-19 07:32:54,719 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:32:54,720 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:32:54,720 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:32:54,721 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:32:54,729 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:54" (1/1) ... [2023-11-19 07:32:54,760 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:54" (1/1) ... [2023-11-19 07:32:54,788 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 83 [2023-11-19 07:32:54,789 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:32:54,790 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:32:54,791 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:32:54,791 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:32:54,801 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:54" (1/1) ... [2023-11-19 07:32:54,802 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:54" (1/1) ... [2023-11-19 07:32:54,805 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:54" (1/1) ... [2023-11-19 07:32:54,806 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:54" (1/1) ... [2023-11-19 07:32:54,817 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:54" (1/1) ... [2023-11-19 07:32:54,823 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:54" (1/1) ... [2023-11-19 07:32:54,826 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:54" (1/1) ... [2023-11-19 07:32:54,827 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:54" (1/1) ... [2023-11-19 07:32:54,831 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:32:54,832 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:32:54,832 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:32:54,832 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:32:54,833 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:54" (1/1) ... [2023-11-19 07:32:54,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:32:54,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:32:54,874 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:32:54,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:32:54,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:32:54,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:32:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:32:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:32:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:32:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 07:32:54,920 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 07:32:54,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:32:54,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:32:54,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:32:54,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:32:54,923 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:32:55,069 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:32:55,072 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:32:55,488 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:32:55,499 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:32:55,499 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-19 07:32:55,503 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:32:55 BoogieIcfgContainer [2023-11-19 07:32:55,504 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:32:55,506 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:32:55,506 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:32:55,510 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:32:55,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:32:54" (1/3) ... [2023-11-19 07:32:55,512 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fcfe19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:32:55, skipping insertion in model container [2023-11-19 07:32:55,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:54" (2/3) ... [2023-11-19 07:32:55,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fcfe19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:32:55, skipping insertion in model container [2023-11-19 07:32:55,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:32:55" (3/3) ... [2023-11-19 07:32:55,514 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_01-simple_racing.i [2023-11-19 07:32:55,536 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:32:55,537 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-19 07:32:55,537 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:32:55,625 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-19 07:32:55,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 123 transitions, 253 flow [2023-11-19 07:32:55,809 INFO L124 PetriNetUnfolderBase]: 19/173 cut-off events. [2023-11-19 07:32:55,810 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:32:55,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 173 events. 19/173 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 476 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2023-11-19 07:32:55,817 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 123 transitions, 253 flow [2023-11-19 07:32:55,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 123 transitions, 253 flow [2023-11-19 07:32:55,832 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:32:55,856 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 123 transitions, 253 flow [2023-11-19 07:32:55,861 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 123 transitions, 253 flow [2023-11-19 07:32:55,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 123 transitions, 253 flow [2023-11-19 07:32:55,934 INFO L124 PetriNetUnfolderBase]: 19/173 cut-off events. [2023-11-19 07:32:55,934 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:32:55,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 173 events. 19/173 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 476 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2023-11-19 07:32:55,940 INFO L119 LiptonReduction]: Number of co-enabled transitions 3136 [2023-11-19 07:33:00,143 INFO L134 LiptonReduction]: Checked pairs total: 5403 [2023-11-19 07:33:00,143 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-11-19 07:33:00,160 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:33:00,167 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;@c207022, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:33:00,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:33:00,170 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:33:00,171 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-19 07:33:00,171 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:33:00,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:00,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:33:00,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:33:00,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:00,178 INFO L85 PathProgramCache]: Analyzing trace with hash 15239, now seen corresponding path program 1 times [2023-11-19 07:33:00,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:00,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922220919] [2023-11-19 07:33:00,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:00,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:00,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:00,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922220919] [2023-11-19 07:33:00,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922220919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:00,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:00,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:33:00,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247201255] [2023-11-19 07:33:00,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:00,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:33:00,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:00,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:33:00,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:33:00,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 239 [2023-11-19 07:33:00,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 38 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:00,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:00,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 239 [2023-11-19 07:33:00,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:00,946 INFO L124 PetriNetUnfolderBase]: 120/277 cut-off events. [2023-11-19 07:33:00,947 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:33:00,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 277 events. 120/277 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1034 event pairs, 98 based on Foata normal form. 16/216 useless extension candidates. Maximal degree in co-relation 527. Up to 263 conditions per place. [2023-11-19 07:33:00,956 INFO L140 encePairwiseOnDemand]: 226/239 looper letters, 34 selfloop transitions, 2 changer transitions 1/39 dead transitions. [2023-11-19 07:33:00,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 39 transitions, 159 flow [2023-11-19 07:33:00,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:33:00,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:33:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2023-11-19 07:33:00,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.497907949790795 [2023-11-19 07:33:00,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2023-11-19 07:33:00,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2023-11-19 07:33:00,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:00,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2023-11-19 07:33:00,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,007 INFO L175 Difference]: Start difference. First operand has 31 places, 38 transitions, 83 flow. Second operand 3 states and 357 transitions. [2023-11-19 07:33:01,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 39 transitions, 159 flow [2023-11-19 07:33:01,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:33:01,014 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 73 flow [2023-11-19 07:33:01,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-11-19 07:33:01,021 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-11-19 07:33:01,021 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 73 flow [2023-11-19 07:33:01,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:01,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:33:01,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:33:01,024 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:33:01,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:01,025 INFO L85 PathProgramCache]: Analyzing trace with hash 15237, now seen corresponding path program 1 times [2023-11-19 07:33:01,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:01,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418913087] [2023-11-19 07:33:01,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:01,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:01,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:01,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418913087] [2023-11-19 07:33:01,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418913087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:01,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:01,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:33:01,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713512449] [2023-11-19 07:33:01,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:01,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:33:01,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:01,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:33:01,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:33:01,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 239 [2023-11-19 07:33:01,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:01,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 239 [2023-11-19 07:33:01,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:01,287 INFO L124 PetriNetUnfolderBase]: 96/224 cut-off events. [2023-11-19 07:33:01,287 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-19 07:33:01,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 224 events. 96/224 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 783 event pairs, 88 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 463. Up to 202 conditions per place. [2023-11-19 07:33:01,290 INFO L140 encePairwiseOnDemand]: 235/239 looper letters, 30 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-11-19 07:33:01,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 34 transitions, 149 flow [2023-11-19 07:33:01,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:33:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:33:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2023-11-19 07:33:01,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4616457461645746 [2023-11-19 07:33:01,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2023-11-19 07:33:01,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2023-11-19 07:33:01,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:01,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2023-11-19 07:33:01,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,299 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,300 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 73 flow. Second operand 3 states and 331 transitions. [2023-11-19 07:33:01,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 34 transitions, 149 flow [2023-11-19 07:33:01,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 145 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:33:01,302 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 69 flow [2023-11-19 07:33:01,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-19 07:33:01,304 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-11-19 07:33:01,304 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 69 flow [2023-11-19 07:33:01,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:01,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:33:01,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:33:01,306 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:33:01,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:01,309 INFO L85 PathProgramCache]: Analyzing trace with hash 454286976, now seen corresponding path program 1 times [2023-11-19 07:33:01,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:01,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791726820] [2023-11-19 07:33:01,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:01,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:01,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:01,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791726820] [2023-11-19 07:33:01,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791726820] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:33:01,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98481488] [2023-11-19 07:33:01,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:01,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:33:01,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:33:01,447 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:33:01,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:33:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:01,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:33:01,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:33:01,638 INFO L378 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 [2023-11-19 07:33:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:01,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:33:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:01,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98481488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:33:01,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:33:01,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 07:33:01,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427454828] [2023-11-19 07:33:01,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:33:01,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:33:01,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:01,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:33:01,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:33:01,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 239 [2023-11-19 07:33:01,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 69 flow. Second operand has 8 states, 8 states have (on average 98.875) internal successors, (791), 8 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:01,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 239 [2023-11-19 07:33:01,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:02,028 INFO L124 PetriNetUnfolderBase]: 16/55 cut-off events. [2023-11-19 07:33:02,029 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:33:02,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 55 events. 16/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 0 based on Foata normal form. 9/64 useless extension candidates. Maximal degree in co-relation 109. Up to 34 conditions per place. [2023-11-19 07:33:02,030 INFO L140 encePairwiseOnDemand]: 235/239 looper letters, 19 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-11-19 07:33:02,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 96 flow [2023-11-19 07:33:02,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:33:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:33:02,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 411 transitions. [2023-11-19 07:33:02,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4299163179916318 [2023-11-19 07:33:02,033 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 411 transitions. [2023-11-19 07:33:02,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 411 transitions. [2023-11-19 07:33:02,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:02,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 411 transitions. [2023-11-19 07:33:02,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:02,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:02,040 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:02,040 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 69 flow. Second operand 4 states and 411 transitions. [2023-11-19 07:33:02,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 96 flow [2023-11-19 07:33:02,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 93 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:33:02,042 INFO L231 Difference]: Finished difference. Result has 21 places, 14 transitions, 37 flow [2023-11-19 07:33:02,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=37, PETRI_PLACES=21, PETRI_TRANSITIONS=14} [2023-11-19 07:33:02,043 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -10 predicate places. [2023-11-19 07:33:02,044 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 14 transitions, 37 flow [2023-11-19 07:33:02,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 98.875) internal successors, (791), 8 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:02,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:02,045 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:33:02,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:33:02,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:33:02,265 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:33:02,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:02,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1197994667, now seen corresponding path program 1 times [2023-11-19 07:33:02,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:02,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87960970] [2023-11-19 07:33:02,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:02,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:33:02,300 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:33:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:33:02,345 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:33:02,345 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:33:02,347 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 07:33:02,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-19 07:33:02,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-19 07:33:02,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-19 07:33:02,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-19 07:33:02,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-19 07:33:02,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-19 07:33:02,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:33:02,353 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:33:02,356 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:33:02,356 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:33:02,388 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:33:02,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 153 transitions, 322 flow [2023-11-19 07:33:02,479 INFO L124 PetriNetUnfolderBase]: 34/284 cut-off events. [2023-11-19 07:33:02,488 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:33:02,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 284 events. 34/284 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 910 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2023-11-19 07:33:02,491 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 153 transitions, 322 flow [2023-11-19 07:33:02,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 153 transitions, 322 flow [2023-11-19 07:33:02,494 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:33:02,495 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 153 transitions, 322 flow [2023-11-19 07:33:02,495 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 153 transitions, 322 flow [2023-11-19 07:33:02,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 153 transitions, 322 flow [2023-11-19 07:33:02,570 INFO L124 PetriNetUnfolderBase]: 34/284 cut-off events. [2023-11-19 07:33:02,570 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:33:02,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 284 events. 34/284 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 910 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2023-11-19 07:33:02,582 INFO L119 LiptonReduction]: Number of co-enabled transitions 8456 [2023-11-19 07:33:06,523 INFO L134 LiptonReduction]: Checked pairs total: 18732 [2023-11-19 07:33:06,523 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-11-19 07:33:06,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:33:06,527 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;@c207022, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:33:06,527 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:33:06,529 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:33:06,529 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:33:06,529 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:33:06,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:06,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:33:06,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:33:06,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:06,531 INFO L85 PathProgramCache]: Analyzing trace with hash 25115, now seen corresponding path program 1 times [2023-11-19 07:33:06,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:06,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128331230] [2023-11-19 07:33:06,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:06,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:06,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:06,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:06,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128331230] [2023-11-19 07:33:06,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128331230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:06,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:06,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:33:06,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107231065] [2023-11-19 07:33:06,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:06,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:33:06,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:06,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:33:06,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:33:06,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 278 [2023-11-19 07:33:06,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 61 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:06,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:06,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 278 [2023-11-19 07:33:06,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:07,102 INFO L124 PetriNetUnfolderBase]: 1864/3339 cut-off events. [2023-11-19 07:33:07,104 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-11-19 07:33:07,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6448 conditions, 3339 events. 1864/3339 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 21154 event pairs, 896 based on Foata normal form. 672/3396 useless extension candidates. Maximal degree in co-relation 859. Up to 3055 conditions per place. [2023-11-19 07:33:07,130 INFO L140 encePairwiseOnDemand]: 259/278 looper letters, 41 selfloop transitions, 2 changer transitions 1/55 dead transitions. [2023-11-19 07:33:07,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 214 flow [2023-11-19 07:33:07,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:33:07,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:33:07,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2023-11-19 07:33:07,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227817745803357 [2023-11-19 07:33:07,133 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2023-11-19 07:33:07,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2023-11-19 07:33:07,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:07,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2023-11-19 07:33:07,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:07,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:07,139 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:07,139 INFO L175 Difference]: Start difference. First operand has 49 places, 61 transitions, 138 flow. Second operand 3 states and 436 transitions. [2023-11-19 07:33:07,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 214 flow [2023-11-19 07:33:07,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 55 transitions, 214 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:33:07,144 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 120 flow [2023-11-19 07:33:07,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2023-11-19 07:33:07,146 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-11-19 07:33:07,146 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 120 flow [2023-11-19 07:33:07,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:07,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:07,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:33:07,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:33:07,148 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:33:07,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:07,148 INFO L85 PathProgramCache]: Analyzing trace with hash 25113, now seen corresponding path program 1 times [2023-11-19 07:33:07,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:07,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464756723] [2023-11-19 07:33:07,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:07,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:07,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:07,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464756723] [2023-11-19 07:33:07,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464756723] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:07,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:07,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:33:07,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577528396] [2023-11-19 07:33:07,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:07,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:33:07,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:07,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:33:07,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:33:07,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 278 [2023-11-19 07:33:07,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:07,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:07,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 278 [2023-11-19 07:33:07,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:07,605 INFO L124 PetriNetUnfolderBase]: 1500/2704 cut-off events. [2023-11-19 07:33:07,605 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-11-19 07:33:07,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5438 conditions, 2704 events. 1500/2704 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 16348 event pairs, 1368 based on Foata normal form. 0/2357 useless extension candidates. Maximal degree in co-relation 5377. Up to 2265 conditions per place. [2023-11-19 07:33:07,629 INFO L140 encePairwiseOnDemand]: 274/278 looper letters, 45 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-11-19 07:33:07,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 238 flow [2023-11-19 07:33:07,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:33:07,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:33:07,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-11-19 07:33:07,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49280575539568344 [2023-11-19 07:33:07,632 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-11-19 07:33:07,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-11-19 07:33:07,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:07,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-11-19 07:33:07,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:07,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:07,638 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:07,638 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 120 flow. Second operand 3 states and 411 transitions. [2023-11-19 07:33:07,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 238 flow [2023-11-19 07:33:07,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:33:07,644 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 118 flow [2023-11-19 07:33:07,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-11-19 07:33:07,648 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-11-19 07:33:07,648 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 118 flow [2023-11-19 07:33:07,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:07,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:07,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:33:07,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:33:07,650 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:33:07,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:07,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1737707372, now seen corresponding path program 1 times [2023-11-19 07:33:07,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:07,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092707760] [2023-11-19 07:33:07,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:07,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:07,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:07,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092707760] [2023-11-19 07:33:07,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092707760] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:33:07,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326261131] [2023-11-19 07:33:07,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:07,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:33:07,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:33:07,809 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:33:07,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:33:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:07,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:33:07,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:33:07,924 INFO L378 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 [2023-11-19 07:33:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:07,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:33:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:08,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326261131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:33:08,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:33:08,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-19 07:33:08,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227079733] [2023-11-19 07:33:08,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:33:08,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:33:08,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:08,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:33:08,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:33:08,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-11-19 07:33:08,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 121.71428571428571) internal successors, (852), 7 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:08,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:08,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-11-19 07:33:08,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:08,584 INFO L124 PetriNetUnfolderBase]: 1347/2326 cut-off events. [2023-11-19 07:33:08,584 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2023-11-19 07:33:08,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4799 conditions, 2326 events. 1347/2326 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 14186 event pairs, 51 based on Foata normal form. 7/2187 useless extension candidates. Maximal degree in co-relation 4301. Up to 1714 conditions per place. [2023-11-19 07:33:08,607 INFO L140 encePairwiseOnDemand]: 274/278 looper letters, 64 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2023-11-19 07:33:08,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 322 flow [2023-11-19 07:33:08,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:33:08,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:33:08,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 671 transitions. [2023-11-19 07:33:08,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827338129496403 [2023-11-19 07:33:08,611 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 671 transitions. [2023-11-19 07:33:08,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 671 transitions. [2023-11-19 07:33:08,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:08,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 671 transitions. [2023-11-19 07:33:08,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.2) internal successors, (671), 5 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:08,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:08,619 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:08,619 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 118 flow. Second operand 5 states and 671 transitions. [2023-11-19 07:33:08,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 322 flow [2023-11-19 07:33:08,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:33:08,629 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 118 flow [2023-11-19 07:33:08,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=118, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2023-11-19 07:33:08,631 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-11-19 07:33:08,631 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 118 flow [2023-11-19 07:33:08,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 121.71428571428571) internal successors, (852), 7 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:08,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:08,632 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 07:33:08,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:33:08,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:33:08,855 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:33:08,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:08,855 INFO L85 PathProgramCache]: Analyzing trace with hash 89552184, now seen corresponding path program 1 times [2023-11-19 07:33:08,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:08,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702674870] [2023-11-19 07:33:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:08,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:33:08,878 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:33:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:33:08,909 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:33:08,910 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:33:08,910 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 07:33:08,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-19 07:33:08,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-19 07:33:08,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-19 07:33:08,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-19 07:33:08,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-19 07:33:08,913 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-19 07:33:08,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:33:08,914 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:33:08,915 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:33:08,915 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:33:08,952 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:33:08,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 183 transitions, 393 flow [2023-11-19 07:33:09,022 INFO L124 PetriNetUnfolderBase]: 54/440 cut-off events. [2023-11-19 07:33:09,022 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:33:09,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 440 events. 54/440 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1628 event pairs, 1 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 292. Up to 16 conditions per place. [2023-11-19 07:33:09,027 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 183 transitions, 393 flow [2023-11-19 07:33:09,032 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 183 transitions, 393 flow [2023-11-19 07:33:09,032 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:33:09,033 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 183 transitions, 393 flow [2023-11-19 07:33:09,033 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 183 transitions, 393 flow [2023-11-19 07:33:09,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 183 transitions, 393 flow [2023-11-19 07:33:09,089 INFO L124 PetriNetUnfolderBase]: 54/440 cut-off events. [2023-11-19 07:33:09,090 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:33:09,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 440 events. 54/440 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1628 event pairs, 1 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 292. Up to 16 conditions per place. [2023-11-19 07:33:09,114 INFO L119 LiptonReduction]: Number of co-enabled transitions 15288 [2023-11-19 07:33:13,138 INFO L134 LiptonReduction]: Checked pairs total: 38028 [2023-11-19 07:33:13,139 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-11-19 07:33:13,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:33:13,141 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;@c207022, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:33:13,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:33:13,143 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:33:13,143 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-19 07:33:13,143 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:33:13,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:13,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:33:13,144 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:33:13,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:13,145 INFO L85 PathProgramCache]: Analyzing trace with hash 36407, now seen corresponding path program 1 times [2023-11-19 07:33:13,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:13,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723552652] [2023-11-19 07:33:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:13,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:13,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:13,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723552652] [2023-11-19 07:33:13,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723552652] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:13,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:13,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:33:13,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456432506] [2023-11-19 07:33:13,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:13,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:33:13,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:13,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:33:13,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:33:13,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 323 [2023-11-19 07:33:13,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 80 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:13,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:13,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 323 [2023-11-19 07:33:13,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:18,752 INFO L124 PetriNetUnfolderBase]: 30712/45495 cut-off events. [2023-11-19 07:33:18,753 INFO L125 PetriNetUnfolderBase]: For 1039/1039 co-relation queries the response was YES. [2023-11-19 07:33:18,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89515 conditions, 45495 events. 30712/45495 cut-off events. For 1039/1039 co-relation queries the response was YES. Maximal size of possible extension queue 1231. Compared 319487 event pairs, 25801 based on Foata normal form. 9143/48622 useless extension candidates. Maximal degree in co-relation 21268. Up to 36562 conditions per place. [2023-11-19 07:33:19,180 INFO L140 encePairwiseOnDemand]: 297/323 looper letters, 66 selfloop transitions, 2 changer transitions 1/81 dead transitions. [2023-11-19 07:33:19,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 81 transitions, 327 flow [2023-11-19 07:33:19,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:33:19,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:33:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-11-19 07:33:19,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5562435500515995 [2023-11-19 07:33:19,183 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-11-19 07:33:19,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-11-19 07:33:19,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:19,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-11-19 07:33:19,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-19 07:33:19,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:19,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:19,189 INFO L175 Difference]: Start difference. First operand has 63 places, 80 transitions, 187 flow. Second operand 3 states and 539 transitions. [2023-11-19 07:33:19,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 81 transitions, 327 flow [2023-11-19 07:33:19,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 81 transitions, 327 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:33:19,196 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 143 flow [2023-11-19 07:33:19,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2023-11-19 07:33:19,197 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2023-11-19 07:33:19,198 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 143 flow [2023-11-19 07:33:19,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:19,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:19,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:33:19,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:33:19,199 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:33:19,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:19,200 INFO L85 PathProgramCache]: Analyzing trace with hash 36408, now seen corresponding path program 1 times [2023-11-19 07:33:19,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:19,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981958676] [2023-11-19 07:33:19,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:19,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:19,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:19,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981958676] [2023-11-19 07:33:19,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981958676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:19,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:19,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:33:19,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807356975] [2023-11-19 07:33:19,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:19,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:33:19,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:19,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:33:19,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:33:19,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 323 [2023-11-19 07:33:19,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 143 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) [2023-11-19 07:33:19,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:19,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 323 [2023-11-19 07:33:19,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:23,400 INFO L124 PetriNetUnfolderBase]: 28311/42221 cut-off events. [2023-11-19 07:33:23,400 INFO L125 PetriNetUnfolderBase]: For 1805/1805 co-relation queries the response was YES. [2023-11-19 07:33:23,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83836 conditions, 42221 events. 28311/42221 cut-off events. For 1805/1805 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 292319 event pairs, 26957 based on Foata normal form. 0/38407 useless extension candidates. Maximal degree in co-relation 75880. Up to 39945 conditions per place. [2023-11-19 07:33:23,632 INFO L140 encePairwiseOnDemand]: 319/323 looper letters, 52 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-19 07:33:23,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 66 transitions, 271 flow [2023-11-19 07:33:23,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:33:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:33:23,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2023-11-19 07:33:23,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067079463364293 [2023-11-19 07:33:23,635 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2023-11-19 07:33:23,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2023-11-19 07:33:23,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:23,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2023-11-19 07:33:23,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:23,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:23,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:23,641 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 143 flow. Second operand 3 states and 491 transitions. [2023-11-19 07:33:23,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 66 transitions, 271 flow [2023-11-19 07:33:23,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 66 transitions, 267 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:33:23,736 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 153 flow [2023-11-19 07:33:23,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-11-19 07:33:23,738 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2023-11-19 07:33:23,738 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 153 flow [2023-11-19 07:33:23,738 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) [2023-11-19 07:33:23,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:23,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:33:23,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:33:23,739 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:33:23,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:23,740 INFO L85 PathProgramCache]: Analyzing trace with hash -705707888, now seen corresponding path program 1 times [2023-11-19 07:33:23,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:23,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608678178] [2023-11-19 07:33:23,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:23,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:23,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:23,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608678178] [2023-11-19 07:33:23,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608678178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:33:23,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101230695] [2023-11-19 07:33:23,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:23,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:33:23,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:33:23,857 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:33:23,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:33:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:23,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:33:23,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:33:23,958 INFO L378 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 [2023-11-19 07:33:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:24,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:33:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:24,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101230695] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:33:24,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:33:24,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 07:33:24,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003018831] [2023-11-19 07:33:24,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:33:24,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:33:24,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:24,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:33:24,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:33:24,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 323 [2023-11-19 07:33:24,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 153 flow. Second operand has 8 states, 8 states have (on average 142.875) internal successors, (1143), 8 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:24,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:24,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 323 [2023-11-19 07:33:24,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:25,256 INFO L124 PetriNetUnfolderBase]: 5560/9097 cut-off events. [2023-11-19 07:33:25,256 INFO L125 PetriNetUnfolderBase]: For 3277/3277 co-relation queries the response was YES. [2023-11-19 07:33:25,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18305 conditions, 9097 events. 5560/9097 cut-off events. For 3277/3277 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 60695 event pairs, 70 based on Foata normal form. 819/9914 useless extension candidates. Maximal degree in co-relation 16147. Up to 5346 conditions per place. [2023-11-19 07:33:25,388 INFO L140 encePairwiseOnDemand]: 319/323 looper letters, 79 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2023-11-19 07:33:25,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 382 flow [2023-11-19 07:33:25,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:33:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:33:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 935 transitions. [2023-11-19 07:33:25,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4824561403508772 [2023-11-19 07:33:25,393 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 935 transitions. [2023-11-19 07:33:25,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 935 transitions. [2023-11-19 07:33:25,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:25,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 935 transitions. [2023-11-19 07:33:25,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.83333333333334) internal successors, (935), 6 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:25,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 323.0) internal successors, (2261), 7 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:25,402 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 323.0) internal successors, (2261), 7 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:25,402 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 153 flow. Second operand 6 states and 935 transitions. [2023-11-19 07:33:25,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 382 flow [2023-11-19 07:33:25,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 378 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:33:25,406 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 118 flow [2023-11-19 07:33:25,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-11-19 07:33:25,407 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -8 predicate places. [2023-11-19 07:33:25,408 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 118 flow [2023-11-19 07:33:25,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 142.875) internal successors, (1143), 8 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:25,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:25,409 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-19 07:33:25,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:33:25,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfb359c-d430-412f-81fe-466699171537/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:33:25,621 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:33:25,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:25,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1533319003, now seen corresponding path program 1 times [2023-11-19 07:33:25,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:25,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255753258] [2023-11-19 07:33:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:25,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:33:25,648 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:33:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:33:25,670 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:33:25,671 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:33:25,671 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 07:33:25,671 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-19 07:33:25,671 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-19 07:33:25,672 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-19 07:33:25,672 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-19 07:33:25,672 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-19 07:33:25,672 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-19 07:33:25,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:33:25,673 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:33:25,674 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:33:25,674 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-19 07:33:25,705 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-19 07:33:25,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 213 transitions, 466 flow [2023-11-19 07:33:25,802 INFO L124 PetriNetUnfolderBase]: 86/688 cut-off events. [2023-11-19 07:33:25,802 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-19 07:33:25,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 688 events. 86/688 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2962 event pairs, 6 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 460. Up to 32 conditions per place. [2023-11-19 07:33:25,811 INFO L82 GeneralOperation]: Start removeDead. Operand has 188 places, 213 transitions, 466 flow [2023-11-19 07:33:25,817 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 188 places, 213 transitions, 466 flow [2023-11-19 07:33:25,817 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:33:25,817 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 213 transitions, 466 flow [2023-11-19 07:33:25,818 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 213 transitions, 466 flow [2023-11-19 07:33:25,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 213 transitions, 466 flow [2023-11-19 07:33:25,910 INFO L124 PetriNetUnfolderBase]: 86/688 cut-off events. [2023-11-19 07:33:25,910 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-19 07:33:25,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 688 events. 86/688 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2962 event pairs, 6 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 460. Up to 32 conditions per place. [2023-11-19 07:33:25,944 INFO L119 LiptonReduction]: Number of co-enabled transitions 23856 [2023-11-19 07:33:29,891 INFO L134 LiptonReduction]: Checked pairs total: 63200 [2023-11-19 07:33:29,891 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-11-19 07:33:29,892 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:33:29,893 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;@c207022, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:33:29,893 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:33:29,894 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:33:29,895 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:33:29,895 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:33:29,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:29,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:33:29,895 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:33:29,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:29,896 INFO L85 PathProgramCache]: Analyzing trace with hash 49153, now seen corresponding path program 1 times [2023-11-19 07:33:29,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:29,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690728494] [2023-11-19 07:33:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:29,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:29,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:29,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690728494] [2023-11-19 07:33:29,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690728494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:29,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:29,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:33:29,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135670595] [2023-11-19 07:33:29,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:29,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:33:29,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:29,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:33:29,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:33:29,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 368 [2023-11-19 07:33:29,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 99 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:29,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:29,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 368 [2023-11-19 07:33:29,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand