./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 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_27b61716-af5d-4232-833b-453def1d3b97/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27b61716-af5d-4232-833b-453def1d3b97/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27b61716-af5d-4232-833b-453def1d3b97/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27b61716-af5d-4232-833b-453def1d3b97/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27b61716-af5d-4232-833b-453def1d3b97/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27b61716-af5d-4232-833b-453def1d3b97/bin/uautomizer-verify-uTZkv6EMXl --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 21325645cf7d2c394d0eaa1628a16a96624f1addcdd1b56c7e8aa2473acfaf07 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:28:43,949 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:28:44,075 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27b61716-af5d-4232-833b-453def1d3b97/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:28:44,096 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:28:44,097 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:28:44,132 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:28:44,134 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:28:44,135 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:28:44,136 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:28:44,141 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:28:44,142 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:28:44,143 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:28:44,143 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:28:44,145 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:28:44,146 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:28:44,146 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:28:44,147 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:28:44,147 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:28:44,148 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:28:44,148 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:28:44,149 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:28:44,149 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:28:44,150 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:28:44,150 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:28:44,151 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:28:44,151 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:28:44,152 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:28:44,153 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:28:44,154 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:28:44,154 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:28:44,156 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:28:44,156 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:28:44,156 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:28:44,157 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:28:44,157 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:28:44,157 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:28:44,158 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:28:44,158 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:28:44,158 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_27b61716-af5d-4232-833b-453def1d3b97/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27b61716-af5d-4232-833b-453def1d3b97/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21325645cf7d2c394d0eaa1628a16a96624f1addcdd1b56c7e8aa2473acfaf07 [2023-11-12 02:28:44,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:28:44,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:28:44,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:28:44,517 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:28:44,518 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:28:44,520 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27b61716-af5d-4232-833b-453def1d3b97/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2023-11-12 02:28:47,634 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:28:47,907 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:28:47,908 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27b61716-af5d-4232-833b-453def1d3b97/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2023-11-12 02:28:47,938 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27b61716-af5d-4232-833b-453def1d3b97/bin/uautomizer-verify-uTZkv6EMXl/data/c6aa61f23/33f95489d40e447e90cedcd80fa39005/FLAGec955eb02 [2023-11-12 02:28:47,967 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27b61716-af5d-4232-833b-453def1d3b97/bin/uautomizer-verify-uTZkv6EMXl/data/c6aa61f23/33f95489d40e447e90cedcd80fa39005 [2023-11-12 02:28:47,987 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:28:47,989 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:28:47,990 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:28:47,999 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:28:48,005 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:28:48,005 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:28:47" (1/1) ... [2023-11-12 02:28:48,007 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2607b39c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:48, skipping insertion in model container [2023-11-12 02:28:48,007 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:28:47" (1/1) ... [2023-11-12 02:28:48,034 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:28:48,297 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:28:48,313 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:28:48,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:28:48,400 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:28:48,401 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:48 WrapperNode [2023-11-12 02:28:48,401 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:28:48,402 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:28:48,402 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:28:48,403 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:28:48,411 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:48" (1/1) ... [2023-11-12 02:28:48,421 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:48" (1/1) ... [2023-11-12 02:28:48,448 INFO L138 Inliner]: procedures = 22, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 133 [2023-11-12 02:28:48,449 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:28:48,450 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:28:48,450 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:28:48,450 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:28:48,460 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:48" (1/1) ... [2023-11-12 02:28:48,460 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:48" (1/1) ... [2023-11-12 02:28:48,465 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:48" (1/1) ... [2023-11-12 02:28:48,465 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:48" (1/1) ... [2023-11-12 02:28:48,473 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:48" (1/1) ... [2023-11-12 02:28:48,478 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:48" (1/1) ... [2023-11-12 02:28:48,480 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:48" (1/1) ... [2023-11-12 02:28:48,482 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:48" (1/1) ... [2023-11-12 02:28:48,486 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:28:48,487 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:28:48,487 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:28:48,488 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:28:48,489 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:48" (1/1) ... [2023-11-12 02:28:48,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:28:48,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27b61716-af5d-4232-833b-453def1d3b97/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:48,533 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27b61716-af5d-4232-833b-453def1d3b97/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:28:48,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27b61716-af5d-4232-833b-453def1d3b97/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:28:48,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:28:48,581 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:28:48,582 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:28:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:28:48,583 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:28:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 02:28:48,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 02:28:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-12 02:28:48,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-12 02:28:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:28:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-12 02:28:48,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-12 02:28:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-11-12 02:28:48,585 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-11-12 02:28:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:28:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:28:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:28:48,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:28:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:28:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:28:48,587 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:28:48,704 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:28:48,705 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:28:49,156 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:28:49,168 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:28:49,168 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-12 02:28:49,171 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:28:49 BoogieIcfgContainer [2023-11-12 02:28:49,171 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:28:49,174 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:28:49,174 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:28:49,178 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:28:49,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:28:47" (1/3) ... [2023-11-12 02:28:49,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69372ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:28:49, skipping insertion in model container [2023-11-12 02:28:49,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:48" (2/3) ... [2023-11-12 02:28:49,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69372ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:28:49, skipping insertion in model container [2023-11-12 02:28:49,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:28:49" (3/3) ... [2023-11-12 02:28:49,182 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp3x3.wvr.c [2023-11-12 02:28:49,203 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:28:49,204 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-12 02:28:49,204 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:28:49,350 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-11-12 02:28:49,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 209 transitions, 460 flow [2023-11-12 02:28:49,579 INFO L124 PetriNetUnfolderBase]: 14/203 cut-off events. [2023-11-12 02:28:49,579 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:28:49,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 203 events. 14/203 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 147 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2023-11-12 02:28:49,589 INFO L82 GeneralOperation]: Start removeDead. Operand has 214 places, 209 transitions, 460 flow [2023-11-12 02:28:49,607 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 198 transitions, 432 flow [2023-11-12 02:28:49,611 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:28:49,629 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 198 transitions, 432 flow [2023-11-12 02:28:49,635 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 198 transitions, 432 flow [2023-11-12 02:28:49,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 198 transitions, 432 flow [2023-11-12 02:28:49,709 INFO L124 PetriNetUnfolderBase]: 14/198 cut-off events. [2023-11-12 02:28:49,709 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:28:49,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 198 events. 14/198 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 145 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2023-11-12 02:28:49,717 INFO L119 LiptonReduction]: Number of co-enabled transitions 4620 [2023-11-12 02:29:01,878 INFO L134 LiptonReduction]: Checked pairs total: 6364 [2023-11-12 02:29:01,879 INFO L136 LiptonReduction]: Total number of compositions: 190 [2023-11-12 02:29:01,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:29:01,902 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;@3ed51bba, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:29:01,902 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-11-12 02:29:01,904 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:29:01,905 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-12 02:29:01,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:29:01,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:01,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-12 02:29:01,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-12 02:29:01,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:01,912 INFO L85 PathProgramCache]: Analyzing trace with hash 750, now seen corresponding path program 1 times [2023-11-12 02:29:01,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:01,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681207355] [2023-11-12 02:29:01,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:01,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:02,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:02,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681207355] [2023-11-12 02:29:02,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681207355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:02,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:02,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-12 02:29:02,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754182635] [2023-11-12 02:29:02,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:02,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:29:02,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:02,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:29:02,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:29:02,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 399 [2023-11-12 02:29:02,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 68 transitions, 172 flow. Second operand has 2 states, 2 states have (on average 188.5) internal successors, (377), 2 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:02,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:02,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 399 [2023-11-12 02:29:02,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:07,689 INFO L124 PetriNetUnfolderBase]: 36544/42367 cut-off events. [2023-11-12 02:29:07,689 INFO L125 PetriNetUnfolderBase]: For 647/647 co-relation queries the response was YES. [2023-11-12 02:29:07,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85480 conditions, 42367 events. 36544/42367 cut-off events. For 647/647 co-relation queries the response was YES. Maximal size of possible extension queue 1248. Compared 152753 event pairs, 17544 based on Foata normal form. 0/20416 useless extension candidates. Maximal degree in co-relation 64690. Up to 42014 conditions per place. [2023-11-12 02:29:08,098 INFO L140 encePairwiseOnDemand]: 396/399 looper letters, 59 selfloop transitions, 0 changer transitions 0/65 dead transitions. [2023-11-12 02:29:08,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 65 transitions, 284 flow [2023-11-12 02:29:08,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:29:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:29:08,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 438 transitions. [2023-11-12 02:29:08,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5488721804511278 [2023-11-12 02:29:08,127 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 438 transitions. [2023-11-12 02:29:08,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 438 transitions. [2023-11-12 02:29:08,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:08,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 438 transitions. [2023-11-12 02:29:08,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 219.0) internal successors, (438), 2 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:08,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 399.0) internal successors, (1197), 3 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:08,148 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 399.0) internal successors, (1197), 3 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:08,150 INFO L175 Difference]: Start difference. First operand has 81 places, 68 transitions, 172 flow. Second operand 2 states and 438 transitions. [2023-11-12 02:29:08,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 65 transitions, 284 flow [2023-11-12 02:29:08,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 65 transitions, 260 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-12 02:29:08,244 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 142 flow [2023-11-12 02:29:08,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=142, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2023-11-12 02:29:08,254 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -14 predicate places. [2023-11-12 02:29:08,254 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 142 flow [2023-11-12 02:29:08,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 188.5) internal successors, (377), 2 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:08,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:08,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:29:08,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:29:08,256 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-12 02:29:08,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:08,269 INFO L85 PathProgramCache]: Analyzing trace with hash 738509, now seen corresponding path program 1 times [2023-11-12 02:29:08,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:08,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833397820] [2023-11-12 02:29:08,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:08,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:08,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:08,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:08,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833397820] [2023-11-12 02:29:08,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833397820] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:08,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:08,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:29:08,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599121257] [2023-11-12 02:29:08,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:08,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:08,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:08,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:08,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:09,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 399 [2023-11-12 02:29:09,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 142 flow. Second operand has 3 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) [2023-11-12 02:29:09,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:09,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 399 [2023-11-12 02:29:09,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:12,732 INFO L124 PetriNetUnfolderBase]: 34921/40498 cut-off events. [2023-11-12 02:29:12,732 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-12 02:29:12,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81009 conditions, 40498 events. 34921/40498 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 1206. Compared 145188 event pairs, 16733 based on Foata normal form. 0/19605 useless extension candidates. Maximal degree in co-relation 81006. Up to 40144 conditions per place. [2023-11-12 02:29:12,990 INFO L140 encePairwiseOnDemand]: 396/399 looper letters, 56 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2023-11-12 02:29:12,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 63 transitions, 252 flow [2023-11-12 02:29:12,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:12,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:12,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-11-12 02:29:12,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054302422723476 [2023-11-12 02:29:12,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-11-12 02:29:12,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-11-12 02:29:12,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:12,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-11-12 02:29:13,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:13,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:13,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:13,010 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 142 flow. Second operand 3 states and 605 transitions. [2023-11-12 02:29:13,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 63 transitions, 252 flow [2023-11-12 02:29:13,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 63 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:29:13,015 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 140 flow [2023-11-12 02:29:13,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2023-11-12 02:29:13,018 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -14 predicate places. [2023-11-12 02:29:13,018 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 140 flow [2023-11-12 02:29:13,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-12 02:29:13,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:13,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:29:13,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:29:13,025 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-12 02:29:13,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:13,028 INFO L85 PathProgramCache]: Analyzing trace with hash 738508, now seen corresponding path program 1 times [2023-11-12 02:29:13,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:13,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119599161] [2023-11-12 02:29:13,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:13,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:13,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:13,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119599161] [2023-11-12 02:29:13,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119599161] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:13,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:13,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:29:13,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258352063] [2023-11-12 02:29:13,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:13,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:13,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:13,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:13,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:13,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 399 [2023-11-12 02:29:13,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:13,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:13,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 399 [2023-11-12 02:29:13,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:16,241 INFO L124 PetriNetUnfolderBase]: 33298/38629 cut-off events. [2023-11-12 02:29:16,241 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-12 02:29:16,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77273 conditions, 38629 events. 33298/38629 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 137898 event pairs, 15922 based on Foata normal form. 0/18794 useless extension candidates. Maximal degree in co-relation 77269. Up to 38275 conditions per place. [2023-11-12 02:29:16,689 INFO L140 encePairwiseOnDemand]: 396/399 looper letters, 54 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-11-12 02:29:16,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 246 flow [2023-11-12 02:29:16,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:16,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:16,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 579 transitions. [2023-11-12 02:29:16,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48370927318295737 [2023-11-12 02:29:16,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 579 transitions. [2023-11-12 02:29:16,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 579 transitions. [2023-11-12 02:29:16,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:16,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 579 transitions. [2023-11-12 02:29:16,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:16,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:16,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:16,702 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 140 flow. Second operand 3 states and 579 transitions. [2023-11-12 02:29:16,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 246 flow [2023-11-12 02:29:16,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 61 transitions, 245 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:16,705 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 137 flow [2023-11-12 02:29:16,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-11-12 02:29:16,707 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -15 predicate places. [2023-11-12 02:29:16,707 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 137 flow [2023-11-12 02:29:16,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:16,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:16,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:29:16,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:29:16,713 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-12 02:29:16,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:16,714 INFO L85 PathProgramCache]: Analyzing trace with hash 709721843, now seen corresponding path program 1 times [2023-11-12 02:29:16,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:16,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686251622] [2023-11-12 02:29:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:16,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:16,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:16,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686251622] [2023-11-12 02:29:16,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686251622] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:16,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:16,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:29:16,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627177946] [2023-11-12 02:29:16,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:16,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:16,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:16,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:16,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:17,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 399 [2023-11-12 02:29:17,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:17,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:17,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 399 [2023-11-12 02:29:17,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:19,391 INFO L124 PetriNetUnfolderBase]: 32844/38085 cut-off events. [2023-11-12 02:29:19,392 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-12 02:29:19,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76186 conditions, 38085 events. 32844/38085 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 135521 event pairs, 15696 based on Foata normal form. 0/18566 useless extension candidates. Maximal degree in co-relation 76182. Up to 37731 conditions per place. [2023-11-12 02:29:19,656 INFO L140 encePairwiseOnDemand]: 396/399 looper letters, 52 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-11-12 02:29:19,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 59 transitions, 239 flow [2023-11-12 02:29:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:19,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2023-11-12 02:29:19,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020885547201337 [2023-11-12 02:29:19,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2023-11-12 02:29:19,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2023-11-12 02:29:19,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:19,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2023-11-12 02:29:19,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:19,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:19,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:19,670 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 137 flow. Second operand 3 states and 601 transitions. [2023-11-12 02:29:19,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 59 transitions, 239 flow [2023-11-12 02:29:19,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 59 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:19,675 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 134 flow [2023-11-12 02:29:19,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2023-11-12 02:29:19,678 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -16 predicate places. [2023-11-12 02:29:19,678 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 134 flow [2023-11-12 02:29:19,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:19,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:19,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:29:19,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:29:19,680 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-12 02:29:19,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:19,680 INFO L85 PathProgramCache]: Analyzing trace with hash 709721842, now seen corresponding path program 1 times [2023-11-12 02:29:19,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:19,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055160714] [2023-11-12 02:29:19,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:19,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:20,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:20,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055160714] [2023-11-12 02:29:20,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055160714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:20,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:20,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:29:20,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129654323] [2023-11-12 02:29:20,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:20,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:20,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:20,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:20,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:20,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 399 [2023-11-12 02:29:20,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:20,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:20,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 399 [2023-11-12 02:29:20,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:22,410 INFO L124 PetriNetUnfolderBase]: 32390/37541 cut-off events. [2023-11-12 02:29:22,410 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-12 02:29:22,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75099 conditions, 37541 events. 32390/37541 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 133436 event pairs, 15470 based on Foata normal form. 0/18338 useless extension candidates. Maximal degree in co-relation 75095. Up to 37187 conditions per place. [2023-11-12 02:29:22,628 INFO L140 encePairwiseOnDemand]: 396/399 looper letters, 50 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-11-12 02:29:22,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 232 flow [2023-11-12 02:29:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:22,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2023-11-12 02:29:22,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803675856307435 [2023-11-12 02:29:22,631 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2023-11-12 02:29:22,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2023-11-12 02:29:22,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:22,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2023-11-12 02:29:22,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:22,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:22,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:22,640 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 134 flow. Second operand 3 states and 575 transitions. [2023-11-12 02:29:22,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 232 flow [2023-11-12 02:29:22,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 57 transitions, 231 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:22,644 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 131 flow [2023-11-12 02:29:22,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2023-11-12 02:29:22,645 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -17 predicate places. [2023-11-12 02:29:22,645 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 131 flow [2023-11-12 02:29:22,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:22,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:22,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:22,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:29:22,647 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-12 02:29:22,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:22,647 INFO L85 PathProgramCache]: Analyzing trace with hash -857091124, now seen corresponding path program 1 times [2023-11-12 02:29:22,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:22,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543312820] [2023-11-12 02:29:22,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:22,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:22,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:22,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543312820] [2023-11-12 02:29:22,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543312820] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:22,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:22,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:29:22,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130538784] [2023-11-12 02:29:22,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:22,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:22,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:22,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:22,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:22,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 399 [2023-11-12 02:29:22,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:22,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:22,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 399 [2023-11-12 02:29:22,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:25,324 INFO L124 PetriNetUnfolderBase]: 32183/37280 cut-off events. [2023-11-12 02:29:25,324 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-12 02:29:25,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74578 conditions, 37280 events. 32183/37280 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 132249 event pairs, 15371 based on Foata normal form. 0/18239 useless extension candidates. Maximal degree in co-relation 74574. Up to 36926 conditions per place. [2023-11-12 02:29:25,540 INFO L140 encePairwiseOnDemand]: 396/399 looper letters, 48 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-11-12 02:29:25,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 225 flow [2023-11-12 02:29:25,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:25,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:25,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-11-12 02:29:25,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49874686716791977 [2023-11-12 02:29:25,543 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-11-12 02:29:25,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-11-12 02:29:25,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:25,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-11-12 02:29:25,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:25,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:25,551 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:25,552 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 131 flow. Second operand 3 states and 597 transitions. [2023-11-12 02:29:25,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 225 flow [2023-11-12 02:29:25,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 55 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:25,555 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 128 flow [2023-11-12 02:29:25,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2023-11-12 02:29:25,556 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -18 predicate places. [2023-11-12 02:29:25,556 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 128 flow [2023-11-12 02:29:25,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:25,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:25,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:25,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:29:25,558 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-12 02:29:25,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:25,559 INFO L85 PathProgramCache]: Analyzing trace with hash -857091125, now seen corresponding path program 1 times [2023-11-12 02:29:25,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:25,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916218832] [2023-11-12 02:29:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:25,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:25,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:25,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916218832] [2023-11-12 02:29:25,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916218832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:25,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:25,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:29:25,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245676735] [2023-11-12 02:29:25,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:25,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:25,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:25,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:25,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:25,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 399 [2023-11-12 02:29:25,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:25,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:25,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 399 [2023-11-12 02:29:25,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:28,569 INFO L124 PetriNetUnfolderBase]: 31976/37019 cut-off events. [2023-11-12 02:29:28,569 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-12 02:29:28,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74057 conditions, 37019 events. 31976/37019 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 131207 event pairs, 15272 based on Foata normal form. 0/18140 useless extension candidates. Maximal degree in co-relation 74053. Up to 36665 conditions per place. [2023-11-12 02:29:28,781 INFO L140 encePairwiseOnDemand]: 396/399 looper letters, 46 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-11-12 02:29:28,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 53 transitions, 218 flow [2023-11-12 02:29:28,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:28,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:28,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 571 transitions. [2023-11-12 02:29:28,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47702589807852963 [2023-11-12 02:29:28,784 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 571 transitions. [2023-11-12 02:29:28,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 571 transitions. [2023-11-12 02:29:28,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:28,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 571 transitions. [2023-11-12 02:29:28,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:28,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:28,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:28,792 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 128 flow. Second operand 3 states and 571 transitions. [2023-11-12 02:29:28,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 53 transitions, 218 flow [2023-11-12 02:29:28,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 53 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:28,795 INFO L231 Difference]: Finished difference. Result has 62 places, 53 transitions, 125 flow [2023-11-12 02:29:28,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=62, PETRI_TRANSITIONS=53} [2023-11-12 02:29:28,796 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -19 predicate places. [2023-11-12 02:29:28,796 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 53 transitions, 125 flow [2023-11-12 02:29:28,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:28,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:28,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:28,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:29:28,798 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-12 02:29:28,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:28,798 INFO L85 PathProgramCache]: Analyzing trace with hash 969165427, now seen corresponding path program 1 times [2023-11-12 02:29:28,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:28,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387317116] [2023-11-12 02:29:28,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:28,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:28,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:28,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387317116] [2023-11-12 02:29:28,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387317116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:28,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:28,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:29:28,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17402287] [2023-11-12 02:29:28,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:28,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:28,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:29,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:29,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:29,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 399 [2023-11-12 02:29:29,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 53 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:29,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:29,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 399 [2023-11-12 02:29:29,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:31,293 INFO L124 PetriNetUnfolderBase]: 31538/36491 cut-off events. [2023-11-12 02:29:31,293 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-12 02:29:31,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73002 conditions, 36491 events. 31538/36491 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 129074 event pairs, 15062 based on Foata normal form. 0/17912 useless extension candidates. Maximal degree in co-relation 72998. Up to 36137 conditions per place. [2023-11-12 02:29:31,498 INFO L140 encePairwiseOnDemand]: 396/399 looper letters, 44 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-11-12 02:29:31,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 51 transitions, 211 flow [2023-11-12 02:29:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:31,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:31,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 593 transitions. [2023-11-12 02:29:31,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954051796157059 [2023-11-12 02:29:31,503 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 593 transitions. [2023-11-12 02:29:31,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 593 transitions. [2023-11-12 02:29:31,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:31,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 593 transitions. [2023-11-12 02:29:31,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:31,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:31,510 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:31,510 INFO L175 Difference]: Start difference. First operand has 62 places, 53 transitions, 125 flow. Second operand 3 states and 593 transitions. [2023-11-12 02:29:31,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 51 transitions, 211 flow [2023-11-12 02:29:31,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 51 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:31,513 INFO L231 Difference]: Finished difference. Result has 61 places, 51 transitions, 122 flow [2023-11-12 02:29:31,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=61, PETRI_TRANSITIONS=51} [2023-11-12 02:29:31,514 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -20 predicate places. [2023-11-12 02:29:31,514 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 122 flow [2023-11-12 02:29:31,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:31,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:31,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:31,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:29:31,515 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-12 02:29:31,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:31,516 INFO L85 PathProgramCache]: Analyzing trace with hash 969165429, now seen corresponding path program 1 times [2023-11-12 02:29:31,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:31,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351956764] [2023-11-12 02:29:31,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:31,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:31,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:31,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351956764] [2023-11-12 02:29:31,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351956764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:31,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:31,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:29:31,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597317011] [2023-11-12 02:29:31,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:31,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:31,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:31,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:31,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:31,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 399 [2023-11-12 02:29:31,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:31,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:31,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 399 [2023-11-12 02:29:31,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:34,346 INFO L124 PetriNetUnfolderBase]: 31100/35963 cut-off events. [2023-11-12 02:29:34,347 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-12 02:29:34,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71947 conditions, 35963 events. 31100/35963 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 126889 event pairs, 14852 based on Foata normal form. 0/17684 useless extension candidates. Maximal degree in co-relation 71943. Up to 35609 conditions per place. [2023-11-12 02:29:34,572 INFO L140 encePairwiseOnDemand]: 396/399 looper letters, 42 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-11-12 02:29:34,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 49 transitions, 204 flow [2023-11-12 02:29:34,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:34,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:34,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2023-11-12 02:29:34,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2023-11-12 02:29:34,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2023-11-12 02:29:34,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2023-11-12 02:29:34,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:34,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2023-11-12 02:29:34,579 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) [2023-11-12 02:29:34,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:34,582 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:34,583 INFO L175 Difference]: Start difference. First operand has 61 places, 51 transitions, 122 flow. Second operand 3 states and 567 transitions. [2023-11-12 02:29:34,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 49 transitions, 204 flow [2023-11-12 02:29:34,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 49 transitions, 203 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:34,585 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 119 flow [2023-11-12 02:29:34,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-11-12 02:29:34,586 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -21 predicate places. [2023-11-12 02:29:34,586 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 119 flow [2023-11-12 02:29:34,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:34,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:34,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:34,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:29:34,588 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-12 02:29:34,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:34,588 INFO L85 PathProgramCache]: Analyzing trace with hash -639909984, now seen corresponding path program 1 times [2023-11-12 02:29:34,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:34,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237113411] [2023-11-12 02:29:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:34,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:34,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:34,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237113411] [2023-11-12 02:29:34,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237113411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:34,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:34,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:29:34,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534418377] [2023-11-12 02:29:34,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:34,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:34,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:34,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:34,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:34,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 399 [2023-11-12 02:29:34,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:34,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:34,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 399 [2023-11-12 02:29:34,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand