./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.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_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/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_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/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_7b89bd87-381e-459b-8c82-58d8f6f2685c/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 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:05:19,078 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:05:19,146 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 08:05:19,151 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:05:19,152 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:05:19,176 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:05:19,177 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:05:19,177 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:05:19,178 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:05:19,179 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:05:19,180 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:05:19,180 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:05:19,181 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:05:19,182 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:05:19,182 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:05:19,183 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:05:19,183 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:05:19,184 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:05:19,184 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 08:05:19,185 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 08:05:19,185 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 08:05:19,186 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:05:19,186 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 08:05:19,187 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:05:19,187 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:05:19,188 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:05:19,188 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:05:19,188 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:05:19,189 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:05:19,189 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:19,190 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:05:19,190 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:05:19,191 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:05:19,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:05:19,191 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:05:19,191 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:05:19,192 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:05:19,192 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:05:19,192 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_7b89bd87-381e-459b-8c82-58d8f6f2685c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 [2023-11-19 08:05:19,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:05:19,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:05:19,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:05:19,498 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:05:19,499 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:05:19,501 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i [2023-11-19 08:05:22,703 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:05:23,121 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:05:23,121 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i [2023-11-19 08:05:23,138 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/data/929e189a6/e68ec8d1581c4c82a3c59bdeddb58915/FLAG97a29e207 [2023-11-19 08:05:23,154 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/data/929e189a6/e68ec8d1581c4c82a3c59bdeddb58915 [2023-11-19 08:05:23,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:05:23,158 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:05:23,160 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:23,160 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:05:23,166 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:05:23,167 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:23" (1/1) ... [2023-11-19 08:05:23,169 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a216c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:23, skipping insertion in model container [2023-11-19 08:05:23,169 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:23" (1/1) ... [2023-11-19 08:05:23,247 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:05:23,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:23,622 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:05:23,666 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:23,718 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:05:23,718 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:23 WrapperNode [2023-11-19 08:05:23,719 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:23,720 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:23,720 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:05:23,720 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:05:23,729 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:23" (1/1) ... [2023-11-19 08:05:23,764 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:23" (1/1) ... [2023-11-19 08:05:23,801 INFO L138 Inliner]: procedures = 168, calls = 39, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 150 [2023-11-19 08:05:23,802 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:23,803 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:05:23,803 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:05:23,803 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:05:23,814 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:23" (1/1) ... [2023-11-19 08:05:23,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:23" (1/1) ... [2023-11-19 08:05:23,818 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:23" (1/1) ... [2023-11-19 08:05:23,819 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:23" (1/1) ... [2023-11-19 08:05:23,828 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:23" (1/1) ... [2023-11-19 08:05:23,832 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:23" (1/1) ... [2023-11-19 08:05:23,835 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:23" (1/1) ... [2023-11-19 08:05:23,837 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:23" (1/1) ... [2023-11-19 08:05:23,842 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:05:23,843 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:05:23,843 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:05:23,843 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:05:23,854 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:23" (1/1) ... [2023-11-19 08:05:23,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:23,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:23,898 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:05:23,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:05:23,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:05:23,944 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-19 08:05:23,944 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-19 08:05:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-19 08:05:23,945 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-19 08:05:23,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:05:23,947 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 08:05:23,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:05:23,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:05:23,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:05:23,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 08:05:23,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:05:23,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:05:23,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:05:23,949 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 08:05:24,117 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:05:24,130 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:05:24,495 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:05:24,508 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:05:24,508 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 08:05:24,521 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:24 BoogieIcfgContainer [2023-11-19 08:05:24,521 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:05:24,526 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:05:24,527 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:05:24,530 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:05:24,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:05:23" (1/3) ... [2023-11-19 08:05:24,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641b41ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:24, skipping insertion in model container [2023-11-19 08:05:24,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:23" (2/3) ... [2023-11-19 08:05:24,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641b41ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:24, skipping insertion in model container [2023-11-19 08:05:24,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:24" (3/3) ... [2023-11-19 08:05:24,535 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2023-11-19 08:05:24,564 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:05:24,564 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-19 08:05:24,564 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:05:24,709 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 08:05:24,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 184 transitions, 382 flow [2023-11-19 08:05:24,959 INFO L124 PetriNetUnfolderBase]: 14/182 cut-off events. [2023-11-19 08:05:24,960 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:05:24,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 182 events. 14/182 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 430 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 118. Up to 2 conditions per place. [2023-11-19 08:05:24,971 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 184 transitions, 382 flow [2023-11-19 08:05:24,983 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 177 transitions, 366 flow [2023-11-19 08:05:24,988 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:05:25,007 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 177 transitions, 366 flow [2023-11-19 08:05:25,015 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 177 transitions, 366 flow [2023-11-19 08:05:25,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 177 transitions, 366 flow [2023-11-19 08:05:25,095 INFO L124 PetriNetUnfolderBase]: 14/177 cut-off events. [2023-11-19 08:05:25,096 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:05:25,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 14/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 428 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 118. Up to 2 conditions per place. [2023-11-19 08:05:25,109 INFO L119 LiptonReduction]: Number of co-enabled transitions 7646 [2023-11-19 08:05:33,954 INFO L134 LiptonReduction]: Checked pairs total: 18540 [2023-11-19 08:05:33,956 INFO L136 LiptonReduction]: Total number of compositions: 185 [2023-11-19 08:05:33,991 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:05:33,999 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;@60c4ce9d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:05:33,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-11-19 08:05:34,001 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:05:34,001 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 08:05:34,002 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:05:34,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:34,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 08:05:34,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:34,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:34,008 INFO L85 PathProgramCache]: Analyzing trace with hash 751, now seen corresponding path program 1 times [2023-11-19 08:05:34,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:34,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541606371] [2023-11-19 08:05:34,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:34,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:34,139 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 08:05:34,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:34,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541606371] [2023-11-19 08:05:34,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541606371] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:34,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:34,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 08:05:34,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260262463] [2023-11-19 08:05:34,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:34,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:05:34,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:34,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:05:34,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:05:34,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 369 [2023-11-19 08:05:34,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 54 transitions, 120 flow. Second operand has 2 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 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 08:05:34,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:34,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 369 [2023-11-19 08:05:34,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:34,584 INFO L124 PetriNetUnfolderBase]: 1601/2516 cut-off events. [2023-11-19 08:05:34,584 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-11-19 08:05:34,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4938 conditions, 2516 events. 1601/2516 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 12774 event pairs, 1253 based on Foata normal form. 104/1384 useless extension candidates. Maximal degree in co-relation 4656. Up to 2377 conditions per place. [2023-11-19 08:05:34,611 INFO L140 encePairwiseOnDemand]: 365/369 looper letters, 44 selfloop transitions, 0 changer transitions 0/50 dead transitions. [2023-11-19 08:05:34,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 50 transitions, 200 flow [2023-11-19 08:05:34,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:05:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 08:05:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 386 transitions. [2023-11-19 08:05:34,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2023-11-19 08:05:34,642 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 386 transitions. [2023-11-19 08:05:34,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 386 transitions. [2023-11-19 08:05:34,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:34,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 386 transitions. [2023-11-19 08:05:34,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 193.0) internal successors, (386), 2 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:34,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 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 08:05:34,663 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 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 08:05:34,665 INFO L175 Difference]: Start difference. First operand has 53 places, 54 transitions, 120 flow. Second operand 2 states and 386 transitions. [2023-11-19 08:05:34,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 50 transitions, 200 flow [2023-11-19 08:05:34,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 50 transitions, 192 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 08:05:34,674 INFO L231 Difference]: Finished difference. Result has 48 places, 50 transitions, 104 flow [2023-11-19 08:05:34,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=104, PETRI_PLACES=48, PETRI_TRANSITIONS=50} [2023-11-19 08:05:34,681 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -5 predicate places. [2023-11-19 08:05:34,681 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 50 transitions, 104 flow [2023-11-19 08:05:34,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 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 08:05:34,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:34,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 08:05:34,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:05:34,684 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:34,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:34,695 INFO L85 PathProgramCache]: Analyzing trace with hash 739886, now seen corresponding path program 1 times [2023-11-19 08:05:34,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:34,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79209120] [2023-11-19 08:05:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:34,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:35,008 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 08:05:35,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:35,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79209120] [2023-11-19 08:05:35,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79209120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:35,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:35,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:05:35,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872364042] [2023-11-19 08:05:35,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:35,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:35,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:35,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:35,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:35,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 369 [2023-11-19 08:05:35,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 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 08:05:35,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:35,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 369 [2023-11-19 08:05:35,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:35,404 INFO L124 PetriNetUnfolderBase]: 1570/2455 cut-off events. [2023-11-19 08:05:35,405 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-19 08:05:35,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4791 conditions, 2455 events. 1570/2455 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 12356 event pairs, 1228 based on Foata normal form. 0/1260 useless extension candidates. Maximal degree in co-relation 4788. Up to 2319 conditions per place. [2023-11-19 08:05:35,426 INFO L140 encePairwiseOnDemand]: 365/369 looper letters, 40 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-11-19 08:05:35,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 48 transitions, 184 flow [2023-11-19 08:05:35,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:35,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:35,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-11-19 08:05:35,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-11-19 08:05:35,430 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-11-19 08:05:35,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-11-19 08:05:35,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:35,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-11-19 08:05:35,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 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 08:05:35,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:35,439 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:35,439 INFO L175 Difference]: Start difference. First operand has 48 places, 50 transitions, 104 flow. Second operand 3 states and 533 transitions. [2023-11-19 08:05:35,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 48 transitions, 184 flow [2023-11-19 08:05:35,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 184 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:05:35,442 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 104 flow [2023-11-19 08:05:35,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-11-19 08:05:35,443 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -5 predicate places. [2023-11-19 08:05:35,443 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 104 flow [2023-11-19 08:05:35,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 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 08:05:35,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:35,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 08:05:35,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:05:35,445 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:35,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:35,445 INFO L85 PathProgramCache]: Analyzing trace with hash 739885, now seen corresponding path program 1 times [2023-11-19 08:05:35,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:35,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325778268] [2023-11-19 08:05:35,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:35,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:35,515 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 08:05:35,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:35,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325778268] [2023-11-19 08:05:35,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325778268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:35,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:35,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:05:35,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425510738] [2023-11-19 08:05:35,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:35,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:35,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:35,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:35,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:35,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 369 [2023-11-19 08:05:35,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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 08:05:35,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:35,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 369 [2023-11-19 08:05:35,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:35,860 INFO L124 PetriNetUnfolderBase]: 1539/2394 cut-off events. [2023-11-19 08:05:35,860 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-19 08:05:35,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4677 conditions, 2394 events. 1539/2394 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 11907 event pairs, 1203 based on Foata normal form. 0/1240 useless extension candidates. Maximal degree in co-relation 4673. Up to 2263 conditions per place. [2023-11-19 08:05:35,881 INFO L140 encePairwiseOnDemand]: 365/369 looper letters, 38 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-11-19 08:05:35,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 180 flow [2023-11-19 08:05:35,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:35,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:35,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-11-19 08:05:35,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2023-11-19 08:05:35,884 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-11-19 08:05:35,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-11-19 08:05:35,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:35,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-11-19 08:05:35,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 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 08:05:35,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:35,892 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:35,892 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 104 flow. Second operand 3 states and 519 transitions. [2023-11-19 08:05:35,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 180 flow [2023-11-19 08:05:35,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:35,896 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 100 flow [2023-11-19 08:05:35,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-11-19 08:05:35,898 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -7 predicate places. [2023-11-19 08:05:35,898 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 100 flow [2023-11-19 08:05:35,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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 08:05:35,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:35,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:05:35,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:05:35,899 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:35,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:35,900 INFO L85 PathProgramCache]: Analyzing trace with hash 711006130, now seen corresponding path program 1 times [2023-11-19 08:05:35,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:35,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743149240] [2023-11-19 08:05:35,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:35,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:36,103 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 08:05:36,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:36,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743149240] [2023-11-19 08:05:36,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743149240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:36,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:36,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:05:36,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857765908] [2023-11-19 08:05:36,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:36,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:36,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:36,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:36,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:36,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 369 [2023-11-19 08:05:36,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 100 flow. Second operand has 3 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 08:05:36,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:36,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 369 [2023-11-19 08:05:36,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:36,433 INFO L124 PetriNetUnfolderBase]: 1337/2080 cut-off events. [2023-11-19 08:05:36,434 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-19 08:05:36,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4056 conditions, 2080 events. 1337/2080 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 9973 event pairs, 1025 based on Foata normal form. 0/1138 useless extension candidates. Maximal degree in co-relation 4052. Up to 1957 conditions per place. [2023-11-19 08:05:36,452 INFO L140 encePairwiseOnDemand]: 365/369 looper letters, 36 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-11-19 08:05:36,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 172 flow [2023-11-19 08:05:36,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:36,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:36,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2023-11-19 08:05:36,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4751580849141825 [2023-11-19 08:05:36,456 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2023-11-19 08:05:36,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2023-11-19 08:05:36,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:36,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2023-11-19 08:05:36,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 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 08:05:36,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:36,465 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:36,465 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 100 flow. Second operand 3 states and 526 transitions. [2023-11-19 08:05:36,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 172 flow [2023-11-19 08:05:36,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:36,467 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 96 flow [2023-11-19 08:05:36,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, 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=96, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-11-19 08:05:36,469 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -9 predicate places. [2023-11-19 08:05:36,469 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 96 flow [2023-11-19 08:05:36,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 08:05:36,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:36,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:05:36,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:05:36,471 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:36,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:36,472 INFO L85 PathProgramCache]: Analyzing trace with hash 711006129, now seen corresponding path program 1 times [2023-11-19 08:05:36,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:36,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183418334] [2023-11-19 08:05:36,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:36,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:36,820 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 08:05:36,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:36,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183418334] [2023-11-19 08:05:36,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183418334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:36,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:36,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:05:36,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947165508] [2023-11-19 08:05:36,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:36,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:36,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:36,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:36,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:36,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 369 [2023-11-19 08:05:36,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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 08:05:36,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:36,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 369 [2023-11-19 08:05:36,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:37,339 INFO L124 PetriNetUnfolderBase]: 2173/3492 cut-off events. [2023-11-19 08:05:37,339 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-19 08:05:37,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6689 conditions, 3492 events. 2173/3492 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17705 event pairs, 779 based on Foata normal form. 0/1988 useless extension candidates. Maximal degree in co-relation 6685. Up to 1847 conditions per place. [2023-11-19 08:05:37,368 INFO L140 encePairwiseOnDemand]: 363/369 looper letters, 66 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2023-11-19 08:05:37,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 75 transitions, 301 flow [2023-11-19 08:05:37,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:37,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2023-11-19 08:05:37,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2023-11-19 08:05:37,371 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2023-11-19 08:05:37,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2023-11-19 08:05:37,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:37,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2023-11-19 08:05:37,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 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 08:05:37,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:37,379 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:37,379 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 96 flow. Second operand 3 states and 567 transitions. [2023-11-19 08:05:37,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 75 transitions, 301 flow [2023-11-19 08:05:37,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 75 transitions, 295 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:37,382 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 115 flow [2023-11-19 08:05:37,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-11-19 08:05:37,383 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -8 predicate places. [2023-11-19 08:05:37,384 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 115 flow [2023-11-19 08:05:37,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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 08:05:37,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:37,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:05:37,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:05:37,385 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:37,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:37,386 INFO L85 PathProgramCache]: Analyzing trace with hash 711045772, now seen corresponding path program 1 times [2023-11-19 08:05:37,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:37,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608843229] [2023-11-19 08:05:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:37,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:37,463 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 08:05:37,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:37,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608843229] [2023-11-19 08:05:37,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608843229] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:37,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:37,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:05:37,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308370305] [2023-11-19 08:05:37,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:37,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:05:37,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:37,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:05:37,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:05:37,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 369 [2023-11-19 08:05:37,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 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 08:05:37,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:37,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 369 [2023-11-19 08:05:37,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:37,848 INFO L124 PetriNetUnfolderBase]: 1593/2552 cut-off events. [2023-11-19 08:05:37,848 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2023-11-19 08:05:37,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5284 conditions, 2552 events. 1593/2552 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12324 event pairs, 1220 based on Foata normal form. 0/1606 useless extension candidates. Maximal degree in co-relation 5279. Up to 2356 conditions per place. [2023-11-19 08:05:37,870 INFO L140 encePairwiseOnDemand]: 366/369 looper letters, 37 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-11-19 08:05:37,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 191 flow [2023-11-19 08:05:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:37,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:37,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-11-19 08:05:37,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45438121047877145 [2023-11-19 08:05:37,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-11-19 08:05:37,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-11-19 08:05:37,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:37,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-11-19 08:05:37,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 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 08:05:37,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:37,881 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:37,881 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 115 flow. Second operand 3 states and 503 transitions. [2023-11-19 08:05:37,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 191 flow [2023-11-19 08:05:37,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:05:37,885 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 114 flow [2023-11-19 08:05:37,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-11-19 08:05:37,888 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -8 predicate places. [2023-11-19 08:05:37,888 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 114 flow [2023-11-19 08:05:37,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 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 08:05:37,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:37,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:05:37,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:05:37,889 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:37,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:37,890 INFO L85 PathProgramCache]: Analyzing trace with hash 711045773, now seen corresponding path program 1 times [2023-11-19 08:05:37,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:37,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911022915] [2023-11-19 08:05:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:37,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:37,935 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 08:05:37,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:37,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911022915] [2023-11-19 08:05:37,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911022915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:37,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:37,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:05:37,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791755643] [2023-11-19 08:05:37,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:37,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:37,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:37,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:37,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:37,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 369 [2023-11-19 08:05:37,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 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 08:05:37,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:37,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 369 [2023-11-19 08:05:37,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:38,208 INFO L124 PetriNetUnfolderBase]: 1015/1690 cut-off events. [2023-11-19 08:05:38,208 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-11-19 08:05:38,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3459 conditions, 1690 events. 1015/1690 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7863 event pairs, 759 based on Foata normal form. 0/1211 useless extension candidates. Maximal degree in co-relation 3454. Up to 1552 conditions per place. [2023-11-19 08:05:38,221 INFO L140 encePairwiseOnDemand]: 366/369 looper letters, 36 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-11-19 08:05:38,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 188 flow [2023-11-19 08:05:38,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:38,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-11-19 08:05:38,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4670280036133695 [2023-11-19 08:05:38,224 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-11-19 08:05:38,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-11-19 08:05:38,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:38,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-11-19 08:05:38,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 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 08:05:38,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:38,230 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:38,231 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 114 flow. Second operand 3 states and 517 transitions. [2023-11-19 08:05:38,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 188 flow [2023-11-19 08:05:38,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 184 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:38,233 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 112 flow [2023-11-19 08:05:38,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=42, 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=112, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-11-19 08:05:38,234 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -9 predicate places. [2023-11-19 08:05:38,234 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 112 flow [2023-11-19 08:05:38,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 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 08:05:38,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:38,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 08:05:38,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 08:05:38,236 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:38,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:38,236 INFO L85 PathProgramCache]: Analyzing trace with hash 566354492, now seen corresponding path program 1 times [2023-11-19 08:05:38,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:38,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956924247] [2023-11-19 08:05:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:38,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:38,355 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 08:05:38,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:38,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956924247] [2023-11-19 08:05:38,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956924247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:38,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:38,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:05:38,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559012534] [2023-11-19 08:05:38,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:38,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:38,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:38,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:38,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:38,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 369 [2023-11-19 08:05:38,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 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 08:05:38,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:38,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 369 [2023-11-19 08:05:38,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:38,743 INFO L124 PetriNetUnfolderBase]: 843/1458 cut-off events. [2023-11-19 08:05:38,743 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-11-19 08:05:38,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2960 conditions, 1458 events. 843/1458 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 6596 event pairs, 253 based on Foata normal form. 0/1102 useless extension candidates. Maximal degree in co-relation 2955. Up to 881 conditions per place. [2023-11-19 08:05:38,753 INFO L140 encePairwiseOnDemand]: 365/369 looper letters, 59 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-11-19 08:05:38,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 67 transitions, 283 flow [2023-11-19 08:05:38,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:38,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:38,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2023-11-19 08:05:38,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2023-11-19 08:05:38,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2023-11-19 08:05:38,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2023-11-19 08:05:38,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:38,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2023-11-19 08:05:38,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 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 08:05:38,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:38,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:38,765 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 112 flow. Second operand 3 states and 549 transitions. [2023-11-19 08:05:38,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 67 transitions, 283 flow [2023-11-19 08:05:38,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 67 transitions, 277 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:38,767 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 112 flow [2023-11-19 08:05:38,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-11-19 08:05:38,769 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -8 predicate places. [2023-11-19 08:05:38,769 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 112 flow [2023-11-19 08:05:38,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 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 08:05:38,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:38,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:38,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 08:05:38,770 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:38,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:38,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1197512640, now seen corresponding path program 1 times [2023-11-19 08:05:38,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:38,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453881785] [2023-11-19 08:05:38,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:38,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:38,792 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:38,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666573538] [2023-11-19 08:05:38,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:38,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:38,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:38,795 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:38,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:05:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:38,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 08:05:38,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:39,016 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 08:05:39,016 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:39,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:39,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453881785] [2023-11-19 08:05:39,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:39,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666573538] [2023-11-19 08:05:39,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666573538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:39,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:39,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:05:39,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633180933] [2023-11-19 08:05:39,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:39,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:05:39,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:39,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:05:39,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:05:39,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 369 [2023-11-19 08:05:39,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 157.6) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:39,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:39,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 369 [2023-11-19 08:05:39,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:39,459 INFO L124 PetriNetUnfolderBase]: 872/1456 cut-off events. [2023-11-19 08:05:39,460 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2023-11-19 08:05:39,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3116 conditions, 1456 events. 872/1456 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6763 event pairs, 391 based on Foata normal form. 0/1112 useless extension candidates. Maximal degree in co-relation 3110. Up to 855 conditions per place. [2023-11-19 08:05:39,469 INFO L140 encePairwiseOnDemand]: 363/369 looper letters, 86 selfloop transitions, 6 changer transitions 0/98 dead transitions. [2023-11-19 08:05:39,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 98 transitions, 421 flow [2023-11-19 08:05:39,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:05:39,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:05:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 872 transitions. [2023-11-19 08:05:39,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4726287262872629 [2023-11-19 08:05:39,473 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 872 transitions. [2023-11-19 08:05:39,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 872 transitions. [2023-11-19 08:05:39,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:39,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 872 transitions. [2023-11-19 08:05:39,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.4) internal successors, (872), 5 states have internal predecessors, (872), 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 08:05:39,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 369.0) internal successors, (2214), 6 states have internal predecessors, (2214), 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 08:05:39,482 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 369.0) internal successors, (2214), 6 states have internal predecessors, (2214), 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 08:05:39,482 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 112 flow. Second operand 5 states and 872 transitions. [2023-11-19 08:05:39,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 98 transitions, 421 flow [2023-11-19 08:05:39,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 98 transitions, 417 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:39,486 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 129 flow [2023-11-19 08:05:39,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2023-11-19 08:05:39,487 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -5 predicate places. [2023-11-19 08:05:39,487 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 129 flow [2023-11-19 08:05:39,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.6) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:39,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:39,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:39,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:39,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 08:05:39,712 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:39,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:39,712 INFO L85 PathProgramCache]: Analyzing trace with hash -452872212, now seen corresponding path program 1 times [2023-11-19 08:05:39,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:39,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289963939] [2023-11-19 08:05:39,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:39,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:39,822 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 08:05:39,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:39,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289963939] [2023-11-19 08:05:39,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289963939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:39,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:39,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:05:39,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611284244] [2023-11-19 08:05:39,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:39,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:39,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:39,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:39,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:39,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 369 [2023-11-19 08:05:39,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 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 08:05:39,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:39,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 369 [2023-11-19 08:05:39,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:40,088 INFO L124 PetriNetUnfolderBase]: 992/1681 cut-off events. [2023-11-19 08:05:40,089 INFO L125 PetriNetUnfolderBase]: For 349/349 co-relation queries the response was YES. [2023-11-19 08:05:40,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3893 conditions, 1681 events. 992/1681 cut-off events. For 349/349 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7440 event pairs, 438 based on Foata normal form. 0/1384 useless extension candidates. Maximal degree in co-relation 3886. Up to 1017 conditions per place. [2023-11-19 08:05:40,103 INFO L140 encePairwiseOnDemand]: 365/369 looper letters, 61 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-11-19 08:05:40,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 69 transitions, 334 flow [2023-11-19 08:05:40,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:40,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:40,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2023-11-19 08:05:40,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5004516711833785 [2023-11-19 08:05:40,107 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2023-11-19 08:05:40,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2023-11-19 08:05:40,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:40,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2023-11-19 08:05:40,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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 08:05:40,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:40,113 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:40,113 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 129 flow. Second operand 3 states and 554 transitions. [2023-11-19 08:05:40,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 69 transitions, 334 flow [2023-11-19 08:05:40,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 69 transitions, 317 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 08:05:40,131 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 135 flow [2023-11-19 08:05:40,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-19 08:05:40,133 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -5 predicate places. [2023-11-19 08:05:40,133 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 135 flow [2023-11-19 08:05:40,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 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 08:05:40,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:40,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:40,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 08:05:40,135 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:40,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:40,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1766233442, now seen corresponding path program 1 times [2023-11-19 08:05:40,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:40,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074704995] [2023-11-19 08:05:40,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:40,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:40,201 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 08:05:40,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:40,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074704995] [2023-11-19 08:05:40,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074704995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:40,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:40,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:40,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339102305] [2023-11-19 08:05:40,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:40,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:40,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:40,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:40,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:40,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 369 [2023-11-19 08:05:40,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 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 08:05:40,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:40,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 369 [2023-11-19 08:05:40,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:40,518 INFO L124 PetriNetUnfolderBase]: 1104/1995 cut-off events. [2023-11-19 08:05:40,518 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-11-19 08:05:40,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4356 conditions, 1995 events. 1104/1995 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 10414 event pairs, 490 based on Foata normal form. 0/1711 useless extension candidates. Maximal degree in co-relation 4348. Up to 1518 conditions per place. [2023-11-19 08:05:40,531 INFO L140 encePairwiseOnDemand]: 366/369 looper letters, 60 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-11-19 08:05:40,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 69 transitions, 324 flow [2023-11-19 08:05:40,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:40,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2023-11-19 08:05:40,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5022583559168925 [2023-11-19 08:05:40,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2023-11-19 08:05:40,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2023-11-19 08:05:40,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:40,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2023-11-19 08:05:40,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 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 08:05:40,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:40,543 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:40,543 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 135 flow. Second operand 3 states and 556 transitions. [2023-11-19 08:05:40,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 69 transitions, 324 flow [2023-11-19 08:05:40,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:05:40,548 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 144 flow [2023-11-19 08:05:40,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-19 08:05:40,549 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -3 predicate places. [2023-11-19 08:05:40,549 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 144 flow [2023-11-19 08:05:40,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 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 08:05:40,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:40,551 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:40,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 08:05:40,552 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:40,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:40,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2102174041, now seen corresponding path program 1 times [2023-11-19 08:05:40,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:40,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511824741] [2023-11-19 08:05:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:40,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:40,572 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:40,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690473842] [2023-11-19 08:05:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:40,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:40,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:40,574 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:40,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:05:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:40,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 08:05:40,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:40,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:05:40,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:05:40,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-19 08:05:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:40,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:41,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:41,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511824741] [2023-11-19 08:05:41,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:41,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690473842] [2023-11-19 08:05:41,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690473842] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:41,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:05:41,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-19 08:05:41,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710613566] [2023-11-19 08:05:41,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:41,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:05:41,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:41,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:05:41,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:05:41,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 369 [2023-11-19 08:05:41,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 144 flow. Second operand has 6 states, 6 states have (on average 159.66666666666666) internal successors, (958), 6 states have internal predecessors, (958), 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 08:05:41,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:41,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 369 [2023-11-19 08:05:41,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:41,859 INFO L124 PetriNetUnfolderBase]: 763/1422 cut-off events. [2023-11-19 08:05:41,859 INFO L125 PetriNetUnfolderBase]: For 415/423 co-relation queries the response was YES. [2023-11-19 08:05:41,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3197 conditions, 1422 events. 763/1422 cut-off events. For 415/423 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 6674 event pairs, 589 based on Foata normal form. 108/1392 useless extension candidates. Maximal degree in co-relation 3188. Up to 1220 conditions per place. [2023-11-19 08:05:41,870 INFO L140 encePairwiseOnDemand]: 364/369 looper letters, 30 selfloop transitions, 1 changer transitions 2/40 dead transitions. [2023-11-19 08:05:41,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 186 flow [2023-11-19 08:05:41,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:41,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:41,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-11-19 08:05:41,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45438121047877145 [2023-11-19 08:05:41,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-11-19 08:05:41,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-11-19 08:05:41,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:41,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-11-19 08:05:41,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 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 08:05:41,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:41,880 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:41,880 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 144 flow. Second operand 3 states and 503 transitions. [2023-11-19 08:05:41,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 186 flow [2023-11-19 08:05:41,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 176 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 08:05:41,882 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 108 flow [2023-11-19 08:05:41,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-11-19 08:05:41,883 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -9 predicate places. [2023-11-19 08:05:41,884 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 108 flow [2023-11-19 08:05:41,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 159.66666666666666) internal successors, (958), 6 states have internal predecessors, (958), 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 08:05:41,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:41,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:41,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:42,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 08:05:42,105 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:42,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:42,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1753459997, now seen corresponding path program 1 times [2023-11-19 08:05:42,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:42,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871600819] [2023-11-19 08:05:42,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:42,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:42,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:42,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871600819] [2023-11-19 08:05:42,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871600819] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:42,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:42,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:42,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292334910] [2023-11-19 08:05:42,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:42,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:42,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:42,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:42,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:42,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 369 [2023-11-19 08:05:42,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 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 08:05:42,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:42,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 369 [2023-11-19 08:05:42,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:42,461 INFO L124 PetriNetUnfolderBase]: 1135/2094 cut-off events. [2023-11-19 08:05:42,461 INFO L125 PetriNetUnfolderBase]: For 345/353 co-relation queries the response was YES. [2023-11-19 08:05:42,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4458 conditions, 2094 events. 1135/2094 cut-off events. For 345/353 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 10833 event pairs, 542 based on Foata normal form. 2/1968 useless extension candidates. Maximal degree in co-relation 4451. Up to 1168 conditions per place. [2023-11-19 08:05:42,476 INFO L140 encePairwiseOnDemand]: 366/369 looper letters, 52 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-11-19 08:05:42,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 61 transitions, 281 flow [2023-11-19 08:05:42,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:42,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:42,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 546 transitions. [2023-11-19 08:05:42,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4932249322493225 [2023-11-19 08:05:42,480 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 546 transitions. [2023-11-19 08:05:42,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 546 transitions. [2023-11-19 08:05:42,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:42,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 546 transitions. [2023-11-19 08:05:42,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 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 08:05:42,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:42,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:42,486 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 108 flow. Second operand 3 states and 546 transitions. [2023-11-19 08:05:42,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 61 transitions, 281 flow [2023-11-19 08:05:42,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 61 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:05:42,489 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 119 flow [2023-11-19 08:05:42,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-11-19 08:05:42,490 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -9 predicate places. [2023-11-19 08:05:42,490 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 119 flow [2023-11-19 08:05:42,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 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 08:05:42,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:42,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:42,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 08:05:42,492 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:42,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:42,492 INFO L85 PathProgramCache]: Analyzing trace with hash 585784495, now seen corresponding path program 1 times [2023-11-19 08:05:42,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:42,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964577501] [2023-11-19 08:05:42,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:42,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:42,512 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:42,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542176281] [2023-11-19 08:05:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:42,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:42,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:42,514 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:42,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:05:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:42,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:05:42,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:42,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-11-19 08:05:42,689 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 08:05:42,690 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:42,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:42,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964577501] [2023-11-19 08:05:42,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:42,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542176281] [2023-11-19 08:05:42,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542176281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:42,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:42,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:42,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526814700] [2023-11-19 08:05:42,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:42,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:42,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:42,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:42,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:42,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 369 [2023-11-19 08:05:42,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 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 08:05:42,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:42,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 369 [2023-11-19 08:05:42,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:42,992 INFO L124 PetriNetUnfolderBase]: 909/1706 cut-off events. [2023-11-19 08:05:42,993 INFO L125 PetriNetUnfolderBase]: For 543/543 co-relation queries the response was YES. [2023-11-19 08:05:42,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4037 conditions, 1706 events. 909/1706 cut-off events. For 543/543 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 8687 event pairs, 259 based on Foata normal form. 116/1802 useless extension candidates. Maximal degree in co-relation 4029. Up to 1036 conditions per place. [2023-11-19 08:05:43,005 INFO L140 encePairwiseOnDemand]: 365/369 looper letters, 43 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-11-19 08:05:43,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 259 flow [2023-11-19 08:05:43,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:43,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:43,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-11-19 08:05:43,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-11-19 08:05:43,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-11-19 08:05:43,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-11-19 08:05:43,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:43,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-11-19 08:05:43,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 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 08:05:43,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:43,016 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:43,016 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 119 flow. Second operand 3 states and 533 transitions. [2023-11-19 08:05:43,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 259 flow [2023-11-19 08:05:43,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 253 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 08:05:43,020 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 123 flow [2023-11-19 08:05:43,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-11-19 08:05:43,021 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -8 predicate places. [2023-11-19 08:05:43,021 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 123 flow [2023-11-19 08:05:43,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 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 08:05:43,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:43,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:43,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:43,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 08:05:43,236 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:43,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:43,236 INFO L85 PathProgramCache]: Analyzing trace with hash 880864757, now seen corresponding path program 1 times [2023-11-19 08:05:43,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:43,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659630332] [2023-11-19 08:05:43,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:43,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:43,265 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:43,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343350677] [2023-11-19 08:05:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:43,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:43,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:43,267 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:43,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:05:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:43,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 08:05:43,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:43,810 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 08:05:43,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:43,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:43,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659630332] [2023-11-19 08:05:43,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:43,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343350677] [2023-11-19 08:05:43,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343350677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:43,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:43,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:43,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478094377] [2023-11-19 08:05:43,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:43,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:05:43,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:43,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:05:43,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:05:43,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 369 [2023-11-19 08:05:43,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 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 08:05:43,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:43,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 369 [2023-11-19 08:05:43,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:44,198 INFO L124 PetriNetUnfolderBase]: 1015/1976 cut-off events. [2023-11-19 08:05:44,198 INFO L125 PetriNetUnfolderBase]: For 646/656 co-relation queries the response was YES. [2023-11-19 08:05:44,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4726 conditions, 1976 events. 1015/1976 cut-off events. For 646/656 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 10186 event pairs, 313 based on Foata normal form. 0/1930 useless extension candidates. Maximal degree in co-relation 4718. Up to 769 conditions per place. [2023-11-19 08:05:44,214 INFO L140 encePairwiseOnDemand]: 365/369 looper letters, 71 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-11-19 08:05:44,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 82 transitions, 405 flow [2023-11-19 08:05:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:05:44,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:05:44,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 702 transitions. [2023-11-19 08:05:44,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2023-11-19 08:05:44,218 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 702 transitions. [2023-11-19 08:05:44,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 702 transitions. [2023-11-19 08:05:44,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:44,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 702 transitions. [2023-11-19 08:05:44,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 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 08:05:44,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 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 08:05:44,226 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 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 08:05:44,226 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 123 flow. Second operand 4 states and 702 transitions. [2023-11-19 08:05:44,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 82 transitions, 405 flow [2023-11-19 08:05:44,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 82 transitions, 397 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:05:44,231 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2023-11-19 08:05:44,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2023-11-19 08:05:44,231 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -5 predicate places. [2023-11-19 08:05:44,232 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2023-11-19 08:05:44,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 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 08:05:44,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:44,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:44,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:44,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 08:05:44,455 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:44,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:44,455 INFO L85 PathProgramCache]: Analyzing trace with hash 193657710, now seen corresponding path program 1 times [2023-11-19 08:05:44,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:44,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190023220] [2023-11-19 08:05:44,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:44,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:44,478 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:44,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494003993] [2023-11-19 08:05:44,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:44,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:44,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:44,480 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:44,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:05:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:44,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-19 08:05:44,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:44,683 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-19 08:05:44,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-11-19 08:05:44,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-11-19 08:05:44,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-19 08:05:44,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 43 [2023-11-19 08:05:44,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2023-11-19 08:05:45,086 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 08:05:45,087 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:45,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:45,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190023220] [2023-11-19 08:05:45,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:45,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494003993] [2023-11-19 08:05:45,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494003993] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:45,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:45,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 08:05:45,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526609331] [2023-11-19 08:05:45,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:45,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:05:45,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:45,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:05:45,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:05:45,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 369 [2023-11-19 08:05:45,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 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 08:05:45,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:45,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 369 [2023-11-19 08:05:45,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:46,477 INFO L124 PetriNetUnfolderBase]: 1316/2567 cut-off events. [2023-11-19 08:05:46,477 INFO L125 PetriNetUnfolderBase]: For 1003/1021 co-relation queries the response was YES. [2023-11-19 08:05:46,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6123 conditions, 2567 events. 1316/2567 cut-off events. For 1003/1021 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 14314 event pairs, 460 based on Foata normal form. 4/2541 useless extension candidates. Maximal degree in co-relation 6113. Up to 1130 conditions per place. [2023-11-19 08:05:46,496 INFO L140 encePairwiseOnDemand]: 359/369 looper letters, 78 selfloop transitions, 12 changer transitions 0/97 dead transitions. [2023-11-19 08:05:46,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 97 transitions, 497 flow [2023-11-19 08:05:46,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:05:46,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 08:05:46,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1277 transitions. [2023-11-19 08:05:46,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325880758807588 [2023-11-19 08:05:46,502 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1277 transitions. [2023-11-19 08:05:46,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1277 transitions. [2023-11-19 08:05:46,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:46,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1277 transitions. [2023-11-19 08:05:46,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 159.625) internal successors, (1277), 8 states have internal predecessors, (1277), 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 08:05:46,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 369.0) internal successors, (3321), 9 states have internal predecessors, (3321), 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 08:05:46,516 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 369.0) internal successors, (3321), 9 states have internal predecessors, (3321), 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 08:05:46,516 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 8 states and 1277 transitions. [2023-11-19 08:05:46,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 97 transitions, 497 flow [2023-11-19 08:05:46,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 97 transitions, 487 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:46,522 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 228 flow [2023-11-19 08:05:46,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=228, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-11-19 08:05:46,523 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 5 predicate places. [2023-11-19 08:05:46,523 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 228 flow [2023-11-19 08:05:46,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 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 08:05:46,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:46,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:46,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:46,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 08:05:46,740 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:46,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:46,740 INFO L85 PathProgramCache]: Analyzing trace with hash -534239671, now seen corresponding path program 1 times [2023-11-19 08:05:46,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:46,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816911104] [2023-11-19 08:05:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:46,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:46,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:46,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816911104] [2023-11-19 08:05:46,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816911104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:05:46,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225436004] [2023-11-19 08:05:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:46,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:46,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:46,823 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:46,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:05:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:46,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:05:46,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:46,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:47,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225436004] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:47,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:05:47,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-19 08:05:47,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008230908] [2023-11-19 08:05:47,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:47,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:05:47,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:47,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:05:47,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:05:47,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 369 [2023-11-19 08:05:47,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 168.57142857142858) internal successors, (1180), 7 states have internal predecessors, (1180), 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 08:05:47,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:47,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 369 [2023-11-19 08:05:47,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:47,881 INFO L124 PetriNetUnfolderBase]: 2604/5243 cut-off events. [2023-11-19 08:05:47,881 INFO L125 PetriNetUnfolderBase]: For 2893/2905 co-relation queries the response was YES. [2023-11-19 08:05:47,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13274 conditions, 5243 events. 2604/5243 cut-off events. For 2893/2905 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 35180 event pairs, 443 based on Foata normal form. 408/5651 useless extension candidates. Maximal degree in co-relation 13259. Up to 1218 conditions per place. [2023-11-19 08:05:47,923 INFO L140 encePairwiseOnDemand]: 365/369 looper letters, 126 selfloop transitions, 7 changer transitions 0/140 dead transitions. [2023-11-19 08:05:47,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 140 transitions, 852 flow [2023-11-19 08:05:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:05:47,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:05:47,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1093 transitions. [2023-11-19 08:05:47,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.493676603432701 [2023-11-19 08:05:47,929 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1093 transitions. [2023-11-19 08:05:47,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1093 transitions. [2023-11-19 08:05:47,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:47,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1093 transitions. [2023-11-19 08:05:47,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 182.16666666666666) internal successors, (1093), 6 states have internal predecessors, (1093), 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 08:05:47,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 369.0) internal successors, (2583), 7 states have internal predecessors, (2583), 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 08:05:47,939 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 369.0) internal successors, (2583), 7 states have internal predecessors, (2583), 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 08:05:47,939 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 228 flow. Second operand 6 states and 1093 transitions. [2023-11-19 08:05:47,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 140 transitions, 852 flow [2023-11-19 08:05:48,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 140 transitions, 849 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:05:48,012 INFO L231 Difference]: Finished difference. Result has 66 places, 53 transitions, 269 flow [2023-11-19 08:05:48,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=269, PETRI_PLACES=66, PETRI_TRANSITIONS=53} [2023-11-19 08:05:48,013 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 13 predicate places. [2023-11-19 08:05:48,013 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 53 transitions, 269 flow [2023-11-19 08:05:48,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 168.57142857142858) internal successors, (1180), 7 states have internal predecessors, (1180), 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 08:05:48,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:48,014 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:48,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:48,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 08:05:48,223 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:48,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:48,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1147647397, now seen corresponding path program 1 times [2023-11-19 08:05:48,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:48,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141403240] [2023-11-19 08:05:48,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:48,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:48,249 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:48,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520275399] [2023-11-19 08:05:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:48,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:48,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:48,251 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:48,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:05:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:48,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:05:48,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:48,423 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:48,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:48,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141403240] [2023-11-19 08:05:48,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:48,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520275399] [2023-11-19 08:05:48,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520275399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:48,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:48,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:48,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114990132] [2023-11-19 08:05:48,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:48,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:48,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:48,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:48,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:48,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 369 [2023-11-19 08:05:48,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 53 transitions, 269 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:48,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:48,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 369 [2023-11-19 08:05:48,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:49,011 INFO L124 PetriNetUnfolderBase]: 1940/3749 cut-off events. [2023-11-19 08:05:49,011 INFO L125 PetriNetUnfolderBase]: For 5146/5146 co-relation queries the response was YES. [2023-11-19 08:05:49,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11122 conditions, 3749 events. 1940/3749 cut-off events. For 5146/5146 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 20340 event pairs, 668 based on Foata normal form. 122/3871 useless extension candidates. Maximal degree in co-relation 11103. Up to 2452 conditions per place. [2023-11-19 08:05:49,043 INFO L140 encePairwiseOnDemand]: 365/369 looper letters, 65 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2023-11-19 08:05:49,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 71 transitions, 486 flow [2023-11-19 08:05:49,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:49,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:49,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2023-11-19 08:05:49,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4859981933152665 [2023-11-19 08:05:49,046 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2023-11-19 08:05:49,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2023-11-19 08:05:49,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:49,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2023-11-19 08:05:49,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 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 08:05:49,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:49,052 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:49,052 INFO L175 Difference]: Start difference. First operand has 66 places, 53 transitions, 269 flow. Second operand 3 states and 538 transitions. [2023-11-19 08:05:49,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 71 transitions, 486 flow [2023-11-19 08:05:49,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 71 transitions, 459 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-19 08:05:49,069 INFO L231 Difference]: Finished difference. Result has 66 places, 50 transitions, 245 flow [2023-11-19 08:05:49,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=66, PETRI_TRANSITIONS=50} [2023-11-19 08:05:49,070 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 13 predicate places. [2023-11-19 08:05:49,070 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 50 transitions, 245 flow [2023-11-19 08:05:49,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:49,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:49,070 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:49,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:49,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 08:05:49,291 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:49,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:49,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1968516834, now seen corresponding path program 2 times [2023-11-19 08:05:49,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:49,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517654538] [2023-11-19 08:05:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:49,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:49,461 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 08:05:49,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:49,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517654538] [2023-11-19 08:05:49,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517654538] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:05:49,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052697908] [2023-11-19 08:05:49,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:05:49,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:49,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:49,463 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:49,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:05:49,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 08:05:49,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:05:49,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 08:05:49,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-19 08:05:49,943 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:49,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052697908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:49,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:05:49,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-11-19 08:05:49,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789460171] [2023-11-19 08:05:49,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:49,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:49,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:49,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:49,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:05:50,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 369 [2023-11-19 08:05:50,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 50 transitions, 245 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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 08:05:50,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:50,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 369 [2023-11-19 08:05:50,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:50,472 INFO L124 PetriNetUnfolderBase]: 1675/3360 cut-off events. [2023-11-19 08:05:50,472 INFO L125 PetriNetUnfolderBase]: For 4170/4202 co-relation queries the response was YES. [2023-11-19 08:05:50,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9764 conditions, 3360 events. 1675/3360 cut-off events. For 4170/4202 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 18795 event pairs, 1363 based on Foata normal form. 7/3333 useless extension candidates. Maximal degree in co-relation 9744. Up to 2895 conditions per place. [2023-11-19 08:05:50,501 INFO L140 encePairwiseOnDemand]: 367/369 looper letters, 39 selfloop transitions, 1 changer transitions 1/48 dead transitions. [2023-11-19 08:05:50,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 48 transitions, 318 flow [2023-11-19 08:05:50,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:50,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:50,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2023-11-19 08:05:50,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45709123757904246 [2023-11-19 08:05:50,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2023-11-19 08:05:50,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2023-11-19 08:05:50,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:50,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2023-11-19 08:05:50,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 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 08:05:50,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:50,581 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 08:05:50,581 INFO L175 Difference]: Start difference. First operand has 66 places, 50 transitions, 245 flow. Second operand 3 states and 506 transitions. [2023-11-19 08:05:50,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 48 transitions, 318 flow [2023-11-19 08:05:50,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 48 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:50,591 INFO L231 Difference]: Finished difference. Result has 64 places, 47 transitions, 229 flow [2023-11-19 08:05:50,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=229, PETRI_PLACES=64, PETRI_TRANSITIONS=47} [2023-11-19 08:05:50,592 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 11 predicate places. [2023-11-19 08:05:50,592 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 47 transitions, 229 flow [2023-11-19 08:05:50,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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 08:05:50,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:50,593 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:50,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:50,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:50,807 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:50,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:50,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1244755222, now seen corresponding path program 1 times [2023-11-19 08:05:50,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:50,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933066718] [2023-11-19 08:05:50,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:50,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:50,836 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:50,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669469438] [2023-11-19 08:05:50,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:50,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:50,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:50,838 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:50,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:05:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:51,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 08:05:51,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:51,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:53,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:53,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933066718] [2023-11-19 08:05:53,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:53,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669469438] [2023-11-19 08:05:53,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669469438] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:53,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:05:53,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-19 08:05:53,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040905159] [2023-11-19 08:05:53,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:53,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:05:53,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:53,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:05:53,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:05:54,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 369 [2023-11-19 08:05:54,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 47 transitions, 229 flow. Second operand has 12 states, 12 states have (on average 157.58333333333334) internal successors, (1891), 12 states have internal predecessors, (1891), 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 08:05:54,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:54,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 369 [2023-11-19 08:05:54,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:56,766 INFO L124 PetriNetUnfolderBase]: 2056/4181 cut-off events. [2023-11-19 08:05:56,766 INFO L125 PetriNetUnfolderBase]: For 4726/4750 co-relation queries the response was YES. [2023-11-19 08:05:56,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11925 conditions, 4181 events. 2056/4181 cut-off events. For 4726/4750 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 22586 event pairs, 649 based on Foata normal form. 28/4185 useless extension candidates. Maximal degree in co-relation 11905. Up to 775 conditions per place. [2023-11-19 08:05:56,799 INFO L140 encePairwiseOnDemand]: 364/369 looper letters, 135 selfloop transitions, 11 changer transitions 13/166 dead transitions. [2023-11-19 08:05:56,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 166 transitions, 1084 flow [2023-11-19 08:05:56,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 08:05:56,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 08:05:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1657 transitions. [2023-11-19 08:05:56,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44905149051490517 [2023-11-19 08:05:56,807 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1657 transitions. [2023-11-19 08:05:56,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1657 transitions. [2023-11-19 08:05:56,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:56,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1657 transitions. [2023-11-19 08:05:56,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 165.7) internal successors, (1657), 10 states have internal predecessors, (1657), 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 08:05:56,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 369.0) internal successors, (4059), 11 states have internal predecessors, (4059), 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 08:05:56,821 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 369.0) internal successors, (4059), 11 states have internal predecessors, (4059), 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 08:05:56,822 INFO L175 Difference]: Start difference. First operand has 64 places, 47 transitions, 229 flow. Second operand 10 states and 1657 transitions. [2023-11-19 08:05:56,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 166 transitions, 1084 flow [2023-11-19 08:05:56,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 166 transitions, 1083 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:05:56,835 INFO L231 Difference]: Finished difference. Result has 73 places, 53 transitions, 281 flow [2023-11-19 08:05:56,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=281, PETRI_PLACES=73, PETRI_TRANSITIONS=53} [2023-11-19 08:05:56,836 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 20 predicate places. [2023-11-19 08:05:56,836 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 53 transitions, 281 flow [2023-11-19 08:05:56,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 157.58333333333334) internal successors, (1891), 12 states have internal predecessors, (1891), 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 08:05:56,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:56,837 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:56,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:57,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:57,060 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-19 08:05:57,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:57,060 INFO L85 PathProgramCache]: Analyzing trace with hash 772369367, now seen corresponding path program 1 times [2023-11-19 08:05:57,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:57,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335241849] [2023-11-19 08:05:57,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:57,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:57,089 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:57,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185426773] [2023-11-19 08:05:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:57,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:57,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:57,091 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:57,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b89bd87-381e-459b-8c82-58d8f6f2685c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:05:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:57,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-19 08:05:57,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:57,756 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-19 08:05:57,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-11-19 08:05:57,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-11-19 08:05:57,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-19 08:05:58,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-19 08:05:59,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2023-11-19 08:05:59,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2023-11-19 08:05:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:59,834 INFO L327 TraceCheckSpWp]: Computing backward predicates...