./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/rfi006_rmo.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 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_3736ebeb-8711-4d86-b887-ebea5d4cad69/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3736ebeb-8711-4d86-b887-ebea5d4cad69/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3736ebeb-8711-4d86-b887-ebea5d4cad69/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3736ebeb-8711-4d86-b887-ebea5d4cad69/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/rfi006_rmo.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3736ebeb-8711-4d86-b887-ebea5d4cad69/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3736ebeb-8711-4d86-b887-ebea5d4cad69/bin/uautomizer-verify-zZY32mL2XJ --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 304137b4cdfcb1cb721c511de7faa38271d71a9e3815c7f79977f44461721381 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:34:40,815 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:34:40,933 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3736ebeb-8711-4d86-b887-ebea5d4cad69/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-23 22:34:40,942 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:34:40,943 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:34:40,989 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:34:40,990 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:34:40,991 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:34:40,992 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:34:40,999 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:34:41,001 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:34:41,002 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:34:41,002 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:34:41,004 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:34:41,005 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:34:41,005 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:34:41,006 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:34:41,006 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:34:41,007 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 22:34:41,007 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 22:34:41,008 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 22:34:41,009 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:34:41,009 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 22:34:41,010 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:34:41,010 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:34:41,010 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:34:41,011 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:34:41,012 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:34:41,012 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:34:41,013 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:34:41,014 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:34:41,015 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:34:41,015 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:34:41,015 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:34:41,016 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:34:41,016 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:34:41,016 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:34:41,017 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:34:41,017 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:34:41,017 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_3736ebeb-8711-4d86-b887-ebea5d4cad69/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3736ebeb-8711-4d86-b887-ebea5d4cad69/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 304137b4cdfcb1cb721c511de7faa38271d71a9e3815c7f79977f44461721381 [2023-11-23 22:34:41,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:34:41,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:34:41,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:34:41,433 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:34:41,433 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:34:41,435 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3736ebeb-8711-4d86-b887-ebea5d4cad69/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/pthread-wmm/rfi006_rmo.i [2023-11-23 22:34:44,727 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:34:45,152 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:34:45,153 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3736ebeb-8711-4d86-b887-ebea5d4cad69/sv-benchmarks/c/pthread-wmm/rfi006_rmo.i [2023-11-23 22:34:45,182 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3736ebeb-8711-4d86-b887-ebea5d4cad69/bin/uautomizer-verify-zZY32mL2XJ/data/eda364887/b890e159171545dca4850b11745325e7/FLAG44f86960d [2023-11-23 22:34:45,204 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3736ebeb-8711-4d86-b887-ebea5d4cad69/bin/uautomizer-verify-zZY32mL2XJ/data/eda364887/b890e159171545dca4850b11745325e7 [2023-11-23 22:34:45,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:34:45,213 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:34:45,215 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:34:45,216 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:34:45,222 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:34:45,223 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:34:45" (1/1) ... [2023-11-23 22:34:45,224 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c0735b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:45, skipping insertion in model container [2023-11-23 22:34:45,225 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:34:45" (1/1) ... [2023-11-23 22:34:45,302 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:34:45,840 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:34:45,854 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:34:45,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:34:46,028 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:34:46,028 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:34:46,036 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:34:46,036 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:46 WrapperNode [2023-11-23 22:34:46,037 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:34:46,038 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:34:46,038 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:34:46,038 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:34:46,045 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:46" (1/1) ... [2023-11-23 22:34:46,070 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:46" (1/1) ... [2023-11-23 22:34:46,106 INFO L138 Inliner]: procedures = 176, calls = 74, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 139 [2023-11-23 22:34:46,106 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:34:46,107 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:34:46,107 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:34:46,108 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:34:46,118 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:46" (1/1) ... [2023-11-23 22:34:46,119 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:46" (1/1) ... [2023-11-23 22:34:46,124 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:46" (1/1) ... [2023-11-23 22:34:46,124 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:46" (1/1) ... [2023-11-23 22:34:46,137 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:46" (1/1) ... [2023-11-23 22:34:46,139 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:46" (1/1) ... [2023-11-23 22:34:46,143 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:46" (1/1) ... [2023-11-23 22:34:46,146 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:46" (1/1) ... [2023-11-23 22:34:46,151 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:34:46,152 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:34:46,153 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:34:46,153 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:34:46,154 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:46" (1/1) ... [2023-11-23 22:34:46,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:34:46,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3736ebeb-8711-4d86-b887-ebea5d4cad69/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:46,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3736ebeb-8711-4d86-b887-ebea5d4cad69/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:34:46,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 22:34:46,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 22:34:46,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 22:34:46,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:34:46,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:34:46,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:34:46,279 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-23 22:34:46,280 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-23 22:34:46,280 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-23 22:34:46,280 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-23 22:34:46,280 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-23 22:34:46,280 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-23 22:34:46,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 22:34:46,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 22:34:46,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:34:46,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:34:46,283 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:34:46,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3736ebeb-8711-4d86-b887-ebea5d4cad69/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:34:46,546 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:34:46,550 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:34:47,330 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:34:48,123 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:34:48,123 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 22:34:48,125 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:34:48 BoogieIcfgContainer [2023-11-23 22:34:48,126 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:34:48,132 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:34:48,132 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:34:48,137 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:34:48,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:34:45" (1/3) ... [2023-11-23 22:34:48,138 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2369004a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:34:48, skipping insertion in model container [2023-11-23 22:34:48,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:46" (2/3) ... [2023-11-23 22:34:48,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2369004a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:34:48, skipping insertion in model container [2023-11-23 22:34:48,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:34:48" (3/3) ... [2023-11-23 22:34:48,144 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi006_rmo.i [2023-11-23 22:34:48,169 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:34:48,171 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-23 22:34:48,171 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:34:48,332 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-23 22:34:48,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 88 transitions, 188 flow [2023-11-23 22:34:48,466 INFO L124 PetriNetUnfolderBase]: 2/85 cut-off events. [2023-11-23 22:34:48,466 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:34:48,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 85 events. 2/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 279 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2023-11-23 22:34:48,476 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 88 transitions, 188 flow [2023-11-23 22:34:48,482 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 85 transitions, 179 flow [2023-11-23 22:34:48,505 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:34:48,514 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;@64806e6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:34:48,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2023-11-23 22:34:48,521 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:34:48,521 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-23 22:34:48,521 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:34:48,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:34:48,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-23 22:34:48,523 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:34:48,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:48,555 INFO L85 PathProgramCache]: Analyzing trace with hash 22763, now seen corresponding path program 1 times [2023-11-23 22:34:48,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:48,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261158457] [2023-11-23 22:34:48,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:48,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:48,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:48,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261158457] [2023-11-23 22:34:48,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261158457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:48,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:48,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:34:48,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623428570] [2023-11-23 22:34:48,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:48,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:48,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:49,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:49,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:34:49,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 88 [2023-11-23 22:34:49,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 85 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:49,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:34:49,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 88 [2023-11-23 22:34:49,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:34:52,815 INFO L124 PetriNetUnfolderBase]: 9214/14346 cut-off events. [2023-11-23 22:34:52,816 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-23 22:34:52,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27439 conditions, 14346 events. 9214/14346 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 1466. Compared 119102 event pairs, 7964 based on Foata normal form. 500/7829 useless extension candidates. Maximal degree in co-relation 27425. Up to 11276 conditions per place. [2023-11-23 22:34:53,021 INFO L140 encePairwiseOnDemand]: 63/88 looper letters, 53 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-11-23 22:34:53,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 78 transitions, 275 flow [2023-11-23 22:34:53,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:53,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:34:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 176 transitions. [2023-11-23 22:34:53,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-23 22:34:53,044 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 176 transitions. [2023-11-23 22:34:53,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 176 transitions. [2023-11-23 22:34:53,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:34:53,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 176 transitions. [2023-11-23 22:34:53,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:53,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:53,075 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:53,078 INFO L175 Difference]: Start difference. First operand has 93 places, 85 transitions, 179 flow. Second operand 3 states and 176 transitions. [2023-11-23 22:34:53,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 78 transitions, 275 flow [2023-11-23 22:34:53,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 78 transitions, 272 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:34:53,098 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 132 flow [2023-11-23 22:34:53,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2023-11-23 22:34:53,106 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -23 predicate places. [2023-11-23 22:34:53,107 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 132 flow [2023-11-23 22:34:53,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:53,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:34:53,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-23 22:34:53,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:34:53,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:34:53,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:53,111 INFO L85 PathProgramCache]: Analyzing trace with hash 22764, now seen corresponding path program 1 times [2023-11-23 22:34:53,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:53,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242269812] [2023-11-23 22:34:53,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:53,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:53,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:53,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242269812] [2023-11-23 22:34:53,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242269812] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:53,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:53,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:34:53,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545385210] [2023-11-23 22:34:53,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:53,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:53,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:53,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:53,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:34:53,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2023-11-23 22:34:53,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:53,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:34:53,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2023-11-23 22:34:53,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:34:56,205 INFO L124 PetriNetUnfolderBase]: 9214/14345 cut-off events. [2023-11-23 22:34:56,206 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2023-11-23 22:34:56,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27686 conditions, 14345 events. 9214/14345 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 1466. Compared 118894 event pairs, 7964 based on Foata normal form. 1/7329 useless extension candidates. Maximal degree in co-relation 27675. Up to 11275 conditions per place. [2023-11-23 22:34:56,346 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 52 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-11-23 22:34:56,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 77 transitions, 272 flow [2023-11-23 22:34:56,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:56,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:34:56,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2023-11-23 22:34:56,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2023-11-23 22:34:56,354 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 136 transitions. [2023-11-23 22:34:56,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 136 transitions. [2023-11-23 22:34:56,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:34:56,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 136 transitions. [2023-11-23 22:34:56,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:56,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:56,361 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:56,362 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 132 flow. Second operand 3 states and 136 transitions. [2023-11-23 22:34:56,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 77 transitions, 272 flow [2023-11-23 22:34:56,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 77 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:34:56,411 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 130 flow [2023-11-23 22:34:56,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=69, PETRI_TRANSITIONS=60} [2023-11-23 22:34:56,413 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -24 predicate places. [2023-11-23 22:34:56,413 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 130 flow [2023-11-23 22:34:56,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:56,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:34:56,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 22:34:56,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:34:56,420 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:34:56,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:56,421 INFO L85 PathProgramCache]: Analyzing trace with hash 678886352, now seen corresponding path program 1 times [2023-11-23 22:34:56,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:56,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997862155] [2023-11-23 22:34:56,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:56,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:56,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:56,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997862155] [2023-11-23 22:34:56,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997862155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:56,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:56,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:34:56,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016392591] [2023-11-23 22:34:56,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:56,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:56,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:56,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:56,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:34:56,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 88 [2023-11-23 22:34:56,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:56,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:34:56,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 88 [2023-11-23 22:34:56,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:34:59,727 INFO L124 PetriNetUnfolderBase]: 9218/14344 cut-off events. [2023-11-23 22:34:59,728 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2023-11-23 22:34:59,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27694 conditions, 14344 events. 9218/14344 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 1466. Compared 119763 event pairs, 5720 based on Foata normal form. 0/7336 useless extension candidates. Maximal degree in co-relation 27683. Up to 11278 conditions per place. [2023-11-23 22:34:59,853 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 53 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-11-23 22:34:59,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 76 transitions, 272 flow [2023-11-23 22:34:59,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:59,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:34:59,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 134 transitions. [2023-11-23 22:34:59,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2023-11-23 22:34:59,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 134 transitions. [2023-11-23 22:34:59,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 134 transitions. [2023-11-23 22:34:59,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:34:59,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 134 transitions. [2023-11-23 22:34:59,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:59,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:59,861 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:59,861 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 130 flow. Second operand 3 states and 134 transitions. [2023-11-23 22:34:59,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 76 transitions, 272 flow [2023-11-23 22:34:59,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:34:59,885 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 128 flow [2023-11-23 22:34:59,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2023-11-23 22:34:59,886 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -25 predicate places. [2023-11-23 22:34:59,887 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 128 flow [2023-11-23 22:34:59,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:59,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:34:59,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 22:34:59,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:34:59,888 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:34:59,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:59,889 INFO L85 PathProgramCache]: Analyzing trace with hash 678886353, now seen corresponding path program 1 times [2023-11-23 22:34:59,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:59,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971257981] [2023-11-23 22:34:59,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:59,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:00,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:00,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971257981] [2023-11-23 22:35:00,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971257981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:00,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:00,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:35:00,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85859] [2023-11-23 22:35:00,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:00,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:35:00,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:00,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:35:00,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:35:00,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2023-11-23 22:35:00,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:00,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:00,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2023-11-23 22:35:00,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:02,441 INFO L124 PetriNetUnfolderBase]: 9214/14334 cut-off events. [2023-11-23 22:35:02,441 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2023-11-23 22:35:02,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27679 conditions, 14334 events. 9214/14334 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 1466. Compared 119768 event pairs, 6280 based on Foata normal form. 5/7334 useless extension candidates. Maximal degree in co-relation 27669. Up to 11269 conditions per place. [2023-11-23 22:35:02,567 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 52 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-11-23 22:35:02,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 75 transitions, 268 flow [2023-11-23 22:35:02,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:35:02,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:35:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2023-11-23 22:35:02,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2023-11-23 22:35:02,570 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 136 transitions. [2023-11-23 22:35:02,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 136 transitions. [2023-11-23 22:35:02,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:02,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 136 transitions. [2023-11-23 22:35:02,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:02,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:02,575 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:02,575 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 128 flow. Second operand 3 states and 136 transitions. [2023-11-23 22:35:02,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 75 transitions, 268 flow [2023-11-23 22:35:02,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:35:02,586 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 126 flow [2023-11-23 22:35:02,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2023-11-23 22:35:02,589 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -26 predicate places. [2023-11-23 22:35:02,589 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 126 flow [2023-11-23 22:35:02,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:02,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:02,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 22:35:02,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:35:02,590 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:35:02,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:02,591 INFO L85 PathProgramCache]: Analyzing trace with hash 678888624, now seen corresponding path program 1 times [2023-11-23 22:35:02,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:02,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815486872] [2023-11-23 22:35:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:02,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:02,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:02,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815486872] [2023-11-23 22:35:02,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815486872] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:02,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:02,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:35:02,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438182233] [2023-11-23 22:35:02,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:02,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:35:02,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:02,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:35:02,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:35:02,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2023-11-23 22:35:02,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:02,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:02,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2023-11-23 22:35:02,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:04,115 INFO L124 PetriNetUnfolderBase]: 4498/7558 cut-off events. [2023-11-23 22:35:04,115 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-23 22:35:04,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14401 conditions, 7558 events. 4498/7558 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 61832 event pairs, 3059 based on Foata normal form. 0/4870 useless extension candidates. Maximal degree in co-relation 14390. Up to 4121 conditions per place. [2023-11-23 22:35:04,182 INFO L140 encePairwiseOnDemand]: 75/88 looper letters, 55 selfloop transitions, 6 changer transitions 0/81 dead transitions. [2023-11-23 22:35:04,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 294 flow [2023-11-23 22:35:04,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:35:04,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:35:04,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 181 transitions. [2023-11-23 22:35:04,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142045454545454 [2023-11-23 22:35:04,186 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 181 transitions. [2023-11-23 22:35:04,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 181 transitions. [2023-11-23 22:35:04,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:04,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 181 transitions. [2023-11-23 22:35:04,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:04,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:04,192 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:04,192 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 126 flow. Second operand 4 states and 181 transitions. [2023-11-23 22:35:04,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 294 flow [2023-11-23 22:35:04,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:35:04,200 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 178 flow [2023-11-23 22:35:04,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=69, PETRI_TRANSITIONS=60} [2023-11-23 22:35:04,203 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -24 predicate places. [2023-11-23 22:35:04,204 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 178 flow [2023-11-23 22:35:04,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:04,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:04,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 22:35:04,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:35:04,205 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:35:04,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:04,206 INFO L85 PathProgramCache]: Analyzing trace with hash 678888625, now seen corresponding path program 1 times [2023-11-23 22:35:04,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:04,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459908851] [2023-11-23 22:35:04,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:04,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:04,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:04,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459908851] [2023-11-23 22:35:04,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459908851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:04,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:04,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:35:04,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297301738] [2023-11-23 22:35:04,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:04,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:35:04,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:04,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:35:04,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:35:04,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 88 [2023-11-23 22:35:04,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:04,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:04,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 88 [2023-11-23 22:35:04,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:04,988 INFO L124 PetriNetUnfolderBase]: 1304/2453 cut-off events. [2023-11-23 22:35:04,988 INFO L125 PetriNetUnfolderBase]: For 993/993 co-relation queries the response was YES. [2023-11-23 22:35:04,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5923 conditions, 2453 events. 1304/2453 cut-off events. For 993/993 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 18377 event pairs, 896 based on Foata normal form. 691/2991 useless extension candidates. Maximal degree in co-relation 5909. Up to 1052 conditions per place. [2023-11-23 22:35:05,000 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 37 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-11-23 22:35:05,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 264 flow [2023-11-23 22:35:05,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:35:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:35:05,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 159 transitions. [2023-11-23 22:35:05,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2023-11-23 22:35:05,002 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 159 transitions. [2023-11-23 22:35:05,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 159 transitions. [2023-11-23 22:35:05,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:05,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 159 transitions. [2023-11-23 22:35:05,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:05,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:05,005 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:05,005 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 178 flow. Second operand 4 states and 159 transitions. [2023-11-23 22:35:05,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 264 flow [2023-11-23 22:35:05,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 60 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:35:05,008 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 166 flow [2023-11-23 22:35:05,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2023-11-23 22:35:05,009 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -29 predicate places. [2023-11-23 22:35:05,010 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 166 flow [2023-11-23 22:35:05,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:05,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:05,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:05,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 22:35:05,011 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:35:05,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:05,012 INFO L85 PathProgramCache]: Analyzing trace with hash -296925006, now seen corresponding path program 1 times [2023-11-23 22:35:05,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:05,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900456579] [2023-11-23 22:35:05,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:05,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:05,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:05,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900456579] [2023-11-23 22:35:05,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900456579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:05,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:05,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:35:05,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160082100] [2023-11-23 22:35:05,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:05,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:35:05,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:05,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:35:05,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:35:05,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 88 [2023-11-23 22:35:05,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:05,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:05,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 88 [2023-11-23 22:35:05,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:05,673 INFO L124 PetriNetUnfolderBase]: 1316/2450 cut-off events. [2023-11-23 22:35:05,674 INFO L125 PetriNetUnfolderBase]: For 1062/1062 co-relation queries the response was YES. [2023-11-23 22:35:05,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5984 conditions, 2450 events. 1316/2450 cut-off events. For 1062/1062 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 18431 event pairs, 692 based on Foata normal form. 0/2313 useless extension candidates. Maximal degree in co-relation 5969. Up to 1077 conditions per place. [2023-11-23 22:35:05,695 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 38 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-11-23 22:35:05,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 59 transitions, 266 flow [2023-11-23 22:35:05,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:35:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:35:05,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-23 22:35:05,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2023-11-23 22:35:05,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-23 22:35:05,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-23 22:35:05,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:05,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-23 22:35:05,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:05,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:05,700 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:05,701 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 166 flow. Second operand 3 states and 115 transitions. [2023-11-23 22:35:05,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 59 transitions, 266 flow [2023-11-23 22:35:05,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 59 transitions, 263 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:35:05,705 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 165 flow [2023-11-23 22:35:05,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2023-11-23 22:35:05,706 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -30 predicate places. [2023-11-23 22:35:05,707 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 165 flow [2023-11-23 22:35:05,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:05,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:05,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:05,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 22:35:05,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:35:05,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:05,708 INFO L85 PathProgramCache]: Analyzing trace with hash -296925005, now seen corresponding path program 1 times [2023-11-23 22:35:05,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:05,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858630662] [2023-11-23 22:35:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:05,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:05,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:05,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858630662] [2023-11-23 22:35:05,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858630662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:05,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:05,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:35:05,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749779651] [2023-11-23 22:35:05,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:05,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:35:05,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:05,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:35:05,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:35:05,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2023-11-23 22:35:05,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:05,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:05,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2023-11-23 22:35:05,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:06,278 INFO L124 PetriNetUnfolderBase]: 1304/2417 cut-off events. [2023-11-23 22:35:06,278 INFO L125 PetriNetUnfolderBase]: For 1101/1101 co-relation queries the response was YES. [2023-11-23 22:35:06,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5968 conditions, 2417 events. 1304/2417 cut-off events. For 1101/1101 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 18117 event pairs, 872 based on Foata normal form. 9/2292 useless extension candidates. Maximal degree in co-relation 5954. Up to 1077 conditions per place. [2023-11-23 22:35:06,291 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 37 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-11-23 22:35:06,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 58 transitions, 263 flow [2023-11-23 22:35:06,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:35:06,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:35:06,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2023-11-23 22:35:06,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2023-11-23 22:35:06,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 117 transitions. [2023-11-23 22:35:06,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 117 transitions. [2023-11-23 22:35:06,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:06,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 117 transitions. [2023-11-23 22:35:06,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:06,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:06,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:06,295 INFO L175 Difference]: Start difference. First operand has 63 places, 52 transitions, 165 flow. Second operand 3 states and 117 transitions. [2023-11-23 22:35:06,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 58 transitions, 263 flow [2023-11-23 22:35:06,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 58 transitions, 259 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:35:06,299 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 163 flow [2023-11-23 22:35:06,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2023-11-23 22:35:06,300 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -31 predicate places. [2023-11-23 22:35:06,301 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 163 flow [2023-11-23 22:35:06,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:06,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:06,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:06,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 22:35:06,302 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:35:06,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:06,302 INFO L85 PathProgramCache]: Analyzing trace with hash 123237865, now seen corresponding path program 1 times [2023-11-23 22:35:06,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:06,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993112619] [2023-11-23 22:35:06,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:06,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:06,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:06,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993112619] [2023-11-23 22:35:06,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993112619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:06,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:06,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:35:06,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276531900] [2023-11-23 22:35:06,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:06,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:35:06,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:06,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:35:06,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:35:06,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 88 [2023-11-23 22:35:06,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:06,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:06,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 88 [2023-11-23 22:35:06,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:07,035 INFO L124 PetriNetUnfolderBase]: 1246/2576 cut-off events. [2023-11-23 22:35:07,035 INFO L125 PetriNetUnfolderBase]: For 945/955 co-relation queries the response was YES. [2023-11-23 22:35:07,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6001 conditions, 2576 events. 1246/2576 cut-off events. For 945/955 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20606 event pairs, 432 based on Foata normal form. 0/2447 useless extension candidates. Maximal degree in co-relation 5987. Up to 1359 conditions per place. [2023-11-23 22:35:07,053 INFO L140 encePairwiseOnDemand]: 84/88 looper letters, 53 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2023-11-23 22:35:07,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 75 transitions, 369 flow [2023-11-23 22:35:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:35:07,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:35:07,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2023-11-23 22:35:07,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2023-11-23 22:35:07,056 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2023-11-23 22:35:07,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2023-11-23 22:35:07,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:07,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2023-11-23 22:35:07,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:07,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:07,058 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:07,059 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 163 flow. Second operand 3 states and 135 transitions. [2023-11-23 22:35:07,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 75 transitions, 369 flow [2023-11-23 22:35:07,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 75 transitions, 361 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:35:07,063 INFO L231 Difference]: Finished difference. Result has 63 places, 51 transitions, 172 flow [2023-11-23 22:35:07,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2023-11-23 22:35:07,064 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -30 predicate places. [2023-11-23 22:35:07,064 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 172 flow [2023-11-23 22:35:07,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:07,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:07,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:07,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 22:35:07,065 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:35:07,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:07,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1045158223, now seen corresponding path program 1 times [2023-11-23 22:35:07,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:07,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735074306] [2023-11-23 22:35:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:07,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:07,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:07,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735074306] [2023-11-23 22:35:07,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735074306] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:07,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:07,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:35:07,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591444294] [2023-11-23 22:35:07,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:07,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:35:07,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:07,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:35:07,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:35:07,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 88 [2023-11-23 22:35:07,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 51 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:07,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:07,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 88 [2023-11-23 22:35:07,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:08,077 INFO L124 PetriNetUnfolderBase]: 1280/2718 cut-off events. [2023-11-23 22:35:08,078 INFO L125 PetriNetUnfolderBase]: For 1229/1237 co-relation queries the response was YES. [2023-11-23 22:35:08,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6606 conditions, 2718 events. 1280/2718 cut-off events. For 1229/1237 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 22417 event pairs, 304 based on Foata normal form. 0/2664 useless extension candidates. Maximal degree in co-relation 6590. Up to 972 conditions per place. [2023-11-23 22:35:08,104 INFO L140 encePairwiseOnDemand]: 81/88 looper letters, 45 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2023-11-23 22:35:08,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 72 transitions, 332 flow [2023-11-23 22:35:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:35:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:35:08,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 166 transitions. [2023-11-23 22:35:08,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2023-11-23 22:35:08,107 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 166 transitions. [2023-11-23 22:35:08,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 166 transitions. [2023-11-23 22:35:08,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:08,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 166 transitions. [2023-11-23 22:35:08,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:08,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:08,111 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:08,112 INFO L175 Difference]: Start difference. First operand has 63 places, 51 transitions, 172 flow. Second operand 4 states and 166 transitions. [2023-11-23 22:35:08,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 72 transitions, 332 flow [2023-11-23 22:35:08,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 72 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:35:08,117 INFO L231 Difference]: Finished difference. Result has 63 places, 51 transitions, 184 flow [2023-11-23 22:35:08,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2023-11-23 22:35:08,118 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -30 predicate places. [2023-11-23 22:35:08,119 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 184 flow [2023-11-23 22:35:08,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:08,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:08,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:08,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 22:35:08,120 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:35:08,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:08,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1827405572, now seen corresponding path program 1 times [2023-11-23 22:35:08,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:08,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890863686] [2023-11-23 22:35:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:08,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:08,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:08,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890863686] [2023-11-23 22:35:08,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890863686] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:08,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:08,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:35:08,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165458630] [2023-11-23 22:35:08,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:08,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:35:08,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:08,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:35:08,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:08,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 88 [2023-11-23 22:35:08,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 51 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:08,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:08,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 88 [2023-11-23 22:35:08,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:09,144 INFO L124 PetriNetUnfolderBase]: 1234/2640 cut-off events. [2023-11-23 22:35:09,144 INFO L125 PetriNetUnfolderBase]: For 1476/1484 co-relation queries the response was YES. [2023-11-23 22:35:09,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6570 conditions, 2640 events. 1234/2640 cut-off events. For 1476/1484 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 21759 event pairs, 488 based on Foata normal form. 24/2606 useless extension candidates. Maximal degree in co-relation 6554. Up to 1378 conditions per place. [2023-11-23 22:35:09,163 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 51 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2023-11-23 22:35:09,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 378 flow [2023-11-23 22:35:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:35:09,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:35:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 160 transitions. [2023-11-23 22:35:09,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-11-23 22:35:09,166 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 160 transitions. [2023-11-23 22:35:09,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 160 transitions. [2023-11-23 22:35:09,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:09,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 160 transitions. [2023-11-23 22:35:09,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:09,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:09,170 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:09,170 INFO L175 Difference]: Start difference. First operand has 63 places, 51 transitions, 184 flow. Second operand 4 states and 160 transitions. [2023-11-23 22:35:09,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 378 flow [2023-11-23 22:35:09,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 73 transitions, 365 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:35:09,175 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 176 flow [2023-11-23 22:35:09,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2023-11-23 22:35:09,176 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -30 predicate places. [2023-11-23 22:35:09,176 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 176 flow [2023-11-23 22:35:09,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:09,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:09,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:09,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 22:35:09,177 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:35:09,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:09,178 INFO L85 PathProgramCache]: Analyzing trace with hash 439801253, now seen corresponding path program 1 times [2023-11-23 22:35:09,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:09,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118407966] [2023-11-23 22:35:09,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:09,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:10,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:10,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118407966] [2023-11-23 22:35:10,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118407966] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:10,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:10,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 22:35:10,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999745333] [2023-11-23 22:35:10,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:10,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:35:10,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:10,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:35:10,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:35:10,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 88 [2023-11-23 22:35:10,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 176 flow. Second operand has 9 states, 9 states have (on average 24.666666666666668) internal successors, (222), 9 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:10,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:10,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 88 [2023-11-23 22:35:10,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:11,530 INFO L124 PetriNetUnfolderBase]: 1921/3784 cut-off events. [2023-11-23 22:35:11,531 INFO L125 PetriNetUnfolderBase]: For 1942/1952 co-relation queries the response was YES. [2023-11-23 22:35:11,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9332 conditions, 3784 events. 1921/3784 cut-off events. For 1942/1952 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 31598 event pairs, 641 based on Foata normal form. 0/3614 useless extension candidates. Maximal degree in co-relation 9315. Up to 1308 conditions per place. [2023-11-23 22:35:11,557 INFO L140 encePairwiseOnDemand]: 81/88 looper letters, 74 selfloop transitions, 9 changer transitions 0/99 dead transitions. [2023-11-23 22:35:11,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 99 transitions, 520 flow [2023-11-23 22:35:11,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:35:11,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:35:11,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 238 transitions. [2023-11-23 22:35:11,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2023-11-23 22:35:11,560 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 238 transitions. [2023-11-23 22:35:11,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 238 transitions. [2023-11-23 22:35:11,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:11,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 238 transitions. [2023-11-23 22:35:11,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:11,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:11,566 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:11,566 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 176 flow. Second operand 7 states and 238 transitions. [2023-11-23 22:35:11,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 99 transitions, 520 flow [2023-11-23 22:35:11,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 99 transitions, 513 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:35:11,572 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 251 flow [2023-11-23 22:35:11,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=251, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2023-11-23 22:35:11,574 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -21 predicate places. [2023-11-23 22:35:11,574 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 251 flow [2023-11-23 22:35:11,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 24.666666666666668) internal successors, (222), 9 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:11,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:11,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:11,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 22:35:11,576 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:35:11,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:11,576 INFO L85 PathProgramCache]: Analyzing trace with hash 439800212, now seen corresponding path program 1 times [2023-11-23 22:35:11,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:11,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610748759] [2023-11-23 22:35:11,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:11,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:11,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:11,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610748759] [2023-11-23 22:35:11,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610748759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:11,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:11,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:35:11,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350940557] [2023-11-23 22:35:11,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:11,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:35:11,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:11,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:35:11,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:11,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 88 [2023-11-23 22:35:11,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 57 transitions, 251 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:11,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:11,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 88 [2023-11-23 22:35:11,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:13,585 INFO L124 PetriNetUnfolderBase]: 5589/10534 cut-off events. [2023-11-23 22:35:13,586 INFO L125 PetriNetUnfolderBase]: For 8359/8639 co-relation queries the response was YES. [2023-11-23 22:35:13,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27216 conditions, 10534 events. 5589/10534 cut-off events. For 8359/8639 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 94983 event pairs, 1819 based on Foata normal form. 0/10133 useless extension candidates. Maximal degree in co-relation 27195. Up to 4595 conditions per place. [2023-11-23 22:35:13,665 INFO L140 encePairwiseOnDemand]: 80/88 looper letters, 107 selfloop transitions, 20 changer transitions 1/144 dead transitions. [2023-11-23 22:35:13,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 144 transitions, 926 flow [2023-11-23 22:35:13,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:35:13,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-23 22:35:13,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 301 transitions. [2023-11-23 22:35:13,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275568181818182 [2023-11-23 22:35:13,669 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 301 transitions. [2023-11-23 22:35:13,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 301 transitions. [2023-11-23 22:35:13,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:13,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 301 transitions. [2023-11-23 22:35:13,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 37.625) internal successors, (301), 8 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:13,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:13,673 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:13,674 INFO L175 Difference]: Start difference. First operand has 72 places, 57 transitions, 251 flow. Second operand 8 states and 301 transitions. [2023-11-23 22:35:13,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 144 transitions, 926 flow [2023-11-23 22:35:13,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 144 transitions, 924 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-23 22:35:13,699 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 421 flow [2023-11-23 22:35:13,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=421, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2023-11-23 22:35:13,700 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -9 predicate places. [2023-11-23 22:35:13,701 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 421 flow [2023-11-23 22:35:13,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:13,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:13,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:13,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 22:35:13,701 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:35:13,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:13,702 INFO L85 PathProgramCache]: Analyzing trace with hash 748938258, now seen corresponding path program 1 times [2023-11-23 22:35:13,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:13,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123411821] [2023-11-23 22:35:13,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:13,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:14,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:14,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123411821] [2023-11-23 22:35:14,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123411821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:14,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:14,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:35:14,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666597651] [2023-11-23 22:35:14,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:14,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:35:14,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:14,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:35:14,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:35:14,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 88 [2023-11-23 22:35:14,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 421 flow. Second operand has 7 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:14,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:14,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 88 [2023-11-23 22:35:14,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:15,245 INFO L124 PetriNetUnfolderBase]: 2562/4972 cut-off events. [2023-11-23 22:35:15,245 INFO L125 PetriNetUnfolderBase]: For 6418/6597 co-relation queries the response was YES. [2023-11-23 22:35:15,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14361 conditions, 4972 events. 2562/4972 cut-off events. For 6418/6597 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 42514 event pairs, 1049 based on Foata normal form. 262/5012 useless extension candidates. Maximal degree in co-relation 14333. Up to 2061 conditions per place. [2023-11-23 22:35:15,282 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 36 selfloop transitions, 11 changer transitions 5/78 dead transitions. [2023-11-23 22:35:15,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 78 transitions, 523 flow [2023-11-23 22:35:15,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:35:15,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:35:15,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2023-11-23 22:35:15,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693181818181818 [2023-11-23 22:35:15,284 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 195 transitions. [2023-11-23 22:35:15,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 195 transitions. [2023-11-23 22:35:15,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:15,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 195 transitions. [2023-11-23 22:35:15,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 32.5) internal successors, (195), 6 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:15,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:15,288 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:15,288 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 421 flow. Second operand 6 states and 195 transitions. [2023-11-23 22:35:15,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 78 transitions, 523 flow [2023-11-23 22:35:15,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 78 transitions, 509 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:35:15,330 INFO L231 Difference]: Finished difference. Result has 82 places, 63 transitions, 346 flow [2023-11-23 22:35:15,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=346, PETRI_PLACES=82, PETRI_TRANSITIONS=63} [2023-11-23 22:35:15,332 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -11 predicate places. [2023-11-23 22:35:15,332 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 63 transitions, 346 flow [2023-11-23 22:35:15,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:15,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:15,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:15,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 22:35:15,333 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:35:15,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:15,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1176538216, now seen corresponding path program 1 times [2023-11-23 22:35:15,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:15,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103604337] [2023-11-23 22:35:15,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:15,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:15,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:15,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103604337] [2023-11-23 22:35:15,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103604337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:15,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:15,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:35:15,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219977222] [2023-11-23 22:35:15,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:15,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:35:15,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:15,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:35:15,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:35:16,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 88 [2023-11-23 22:35:16,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 63 transitions, 346 flow. Second operand has 8 states, 8 states have (on average 25.0) internal successors, (200), 8 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:16,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:16,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 88 [2023-11-23 22:35:16,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:16,977 INFO L124 PetriNetUnfolderBase]: 2120/4075 cut-off events. [2023-11-23 22:35:16,977 INFO L125 PetriNetUnfolderBase]: For 5468/5543 co-relation queries the response was YES. [2023-11-23 22:35:17,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11707 conditions, 4075 events. 2120/4075 cut-off events. For 5468/5543 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 33024 event pairs, 1093 based on Foata normal form. 131/4045 useless extension candidates. Maximal degree in co-relation 11678. Up to 2045 conditions per place. [2023-11-23 22:35:17,016 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 34 selfloop transitions, 7 changer transitions 13/72 dead transitions. [2023-11-23 22:35:17,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 72 transitions, 468 flow [2023-11-23 22:35:17,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:35:17,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:35:17,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2023-11-23 22:35:17,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32954545454545453 [2023-11-23 22:35:17,019 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 174 transitions. [2023-11-23 22:35:17,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 174 transitions. [2023-11-23 22:35:17,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:17,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 174 transitions. [2023-11-23 22:35:17,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:17,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:17,022 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:17,023 INFO L175 Difference]: Start difference. First operand has 82 places, 63 transitions, 346 flow. Second operand 6 states and 174 transitions. [2023-11-23 22:35:17,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 72 transitions, 468 flow [2023-11-23 22:35:17,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 72 transitions, 441 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-23 22:35:17,052 INFO L231 Difference]: Finished difference. Result has 80 places, 50 transitions, 234 flow [2023-11-23 22:35:17,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=80, PETRI_TRANSITIONS=50} [2023-11-23 22:35:17,053 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -13 predicate places. [2023-11-23 22:35:17,053 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 50 transitions, 234 flow [2023-11-23 22:35:17,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.0) internal successors, (200), 8 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:17,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:17,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:17,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-23 22:35:17,054 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:35:17,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:17,055 INFO L85 PathProgramCache]: Analyzing trace with hash 587924437, now seen corresponding path program 1 times [2023-11-23 22:35:17,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:17,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410955077] [2023-11-23 22:35:17,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:17,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:17,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:17,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410955077] [2023-11-23 22:35:17,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410955077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:17,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:17,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:35:17,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218389746] [2023-11-23 22:35:17,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:17,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:35:17,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:17,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:35:17,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:17,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 88 [2023-11-23 22:35:17,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 50 transitions, 234 flow. Second operand has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:17,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:17,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 88 [2023-11-23 22:35:17,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:18,433 INFO L124 PetriNetUnfolderBase]: 2906/5183 cut-off events. [2023-11-23 22:35:18,433 INFO L125 PetriNetUnfolderBase]: For 3695/3713 co-relation queries the response was YES. [2023-11-23 22:35:18,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14566 conditions, 5183 events. 2906/5183 cut-off events. For 3695/3713 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 39884 event pairs, 440 based on Foata normal form. 144/5226 useless extension candidates. Maximal degree in co-relation 14540. Up to 2350 conditions per place. [2023-11-23 22:35:18,466 INFO L140 encePairwiseOnDemand]: 81/88 looper letters, 45 selfloop transitions, 5 changer transitions 45/113 dead transitions. [2023-11-23 22:35:18,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 113 transitions, 728 flow [2023-11-23 22:35:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:35:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-23 22:35:18,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 285 transitions. [2023-11-23 22:35:18,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40482954545454547 [2023-11-23 22:35:18,470 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 285 transitions. [2023-11-23 22:35:18,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 285 transitions. [2023-11-23 22:35:18,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:18,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 285 transitions. [2023-11-23 22:35:18,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 35.625) internal successors, (285), 8 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:18,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:18,476 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:18,478 INFO L175 Difference]: Start difference. First operand has 80 places, 50 transitions, 234 flow. Second operand 8 states and 285 transitions. [2023-11-23 22:35:18,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 113 transitions, 728 flow [2023-11-23 22:35:18,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 113 transitions, 661 flow, removed 7 selfloop flow, removed 9 redundant places. [2023-11-23 22:35:18,504 INFO L231 Difference]: Finished difference. Result has 79 places, 50 transitions, 219 flow [2023-11-23 22:35:18,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=219, PETRI_PLACES=79, PETRI_TRANSITIONS=50} [2023-11-23 22:35:18,507 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -14 predicate places. [2023-11-23 22:35:18,507 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 50 transitions, 219 flow [2023-11-23 22:35:18,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:18,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:18,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:18,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-23 22:35:18,512 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:35:18,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:18,512 INFO L85 PathProgramCache]: Analyzing trace with hash -733435349, now seen corresponding path program 1 times [2023-11-23 22:35:18,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:18,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257616113] [2023-11-23 22:35:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:18,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:18,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:18,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257616113] [2023-11-23 22:35:18,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257616113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:18,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:18,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:35:18,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816114339] [2023-11-23 22:35:18,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:18,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:35:18,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:18,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:35:18,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:18,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2023-11-23 22:35:18,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 50 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:18,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:18,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2023-11-23 22:35:18,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:19,751 INFO L124 PetriNetUnfolderBase]: 1845/3407 cut-off events. [2023-11-23 22:35:19,751 INFO L125 PetriNetUnfolderBase]: For 2267/2303 co-relation queries the response was YES. [2023-11-23 22:35:19,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9477 conditions, 3407 events. 1845/3407 cut-off events. For 2267/2303 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 25408 event pairs, 897 based on Foata normal form. 36/3377 useless extension candidates. Maximal degree in co-relation 9450. Up to 1947 conditions per place. [2023-11-23 22:35:19,776 INFO L140 encePairwiseOnDemand]: 81/88 looper letters, 39 selfloop transitions, 7 changer transitions 35/100 dead transitions. [2023-11-23 22:35:19,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 100 transitions, 573 flow [2023-11-23 22:35:19,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:35:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-23 22:35:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 289 transitions. [2023-11-23 22:35:19,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41051136363636365 [2023-11-23 22:35:19,779 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 289 transitions. [2023-11-23 22:35:19,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 289 transitions. [2023-11-23 22:35:19,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:19,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 289 transitions. [2023-11-23 22:35:19,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 36.125) internal successors, (289), 8 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:19,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:19,783 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:19,784 INFO L175 Difference]: Start difference. First operand has 79 places, 50 transitions, 219 flow. Second operand 8 states and 289 transitions. [2023-11-23 22:35:19,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 100 transitions, 573 flow [2023-11-23 22:35:19,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 100 transitions, 541 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-11-23 22:35:19,806 INFO L231 Difference]: Finished difference. Result has 80 places, 50 transitions, 229 flow [2023-11-23 22:35:19,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=229, PETRI_PLACES=80, PETRI_TRANSITIONS=50} [2023-11-23 22:35:19,807 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -13 predicate places. [2023-11-23 22:35:19,807 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 50 transitions, 229 flow [2023-11-23 22:35:19,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:19,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:19,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:19,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-23 22:35:19,808 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:35:19,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:19,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1457007840, now seen corresponding path program 1 times [2023-11-23 22:35:19,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:19,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586990109] [2023-11-23 22:35:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:19,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:21,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:21,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586990109] [2023-11-23 22:35:21,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586990109] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:21,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:21,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 22:35:21,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026719298] [2023-11-23 22:35:21,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:21,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 22:35:21,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:21,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 22:35:21,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:35:21,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 88 [2023-11-23 22:35:21,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 50 transitions, 229 flow. Second operand has 12 states, 12 states have (on average 22.333333333333332) internal successors, (268), 12 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:21,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:21,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 88 [2023-11-23 22:35:21,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:22,958 INFO L124 PetriNetUnfolderBase]: 1752/3142 cut-off events. [2023-11-23 22:35:22,959 INFO L125 PetriNetUnfolderBase]: For 2495/2549 co-relation queries the response was YES. [2023-11-23 22:35:22,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9046 conditions, 3142 events. 1752/3142 cut-off events. For 2495/2549 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 22760 event pairs, 705 based on Foata normal form. 38/3088 useless extension candidates. Maximal degree in co-relation 9017. Up to 1818 conditions per place. [2023-11-23 22:35:22,981 INFO L140 encePairwiseOnDemand]: 77/88 looper letters, 45 selfloop transitions, 13 changer transitions 35/109 dead transitions. [2023-11-23 22:35:22,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 109 transitions, 635 flow [2023-11-23 22:35:22,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 22:35:22,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-23 22:35:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 359 transitions. [2023-11-23 22:35:22,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3138111888111888 [2023-11-23 22:35:22,985 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 359 transitions. [2023-11-23 22:35:22,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 359 transitions. [2023-11-23 22:35:22,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:22,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 359 transitions. [2023-11-23 22:35:22,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 27.615384615384617) internal successors, (359), 13 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:22,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 88.0) internal successors, (1232), 14 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:22,992 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 88.0) internal successors, (1232), 14 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:22,992 INFO L175 Difference]: Start difference. First operand has 80 places, 50 transitions, 229 flow. Second operand 13 states and 359 transitions. [2023-11-23 22:35:22,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 109 transitions, 635 flow [2023-11-23 22:35:23,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 109 transitions, 587 flow, removed 8 selfloop flow, removed 8 redundant places. [2023-11-23 22:35:23,008 INFO L231 Difference]: Finished difference. Result has 87 places, 54 transitions, 275 flow [2023-11-23 22:35:23,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=275, PETRI_PLACES=87, PETRI_TRANSITIONS=54} [2023-11-23 22:35:23,009 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -6 predicate places. [2023-11-23 22:35:23,009 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 54 transitions, 275 flow [2023-11-23 22:35:23,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 22.333333333333332) internal successors, (268), 12 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:23,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:23,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:23,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-23 22:35:23,010 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:35:23,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:23,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1310181048, now seen corresponding path program 2 times [2023-11-23 22:35:23,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:23,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323489349] [2023-11-23 22:35:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:23,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:24,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:24,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323489349] [2023-11-23 22:35:24,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323489349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:24,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:24,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 22:35:24,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137571610] [2023-11-23 22:35:24,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:24,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 22:35:24,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:24,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 22:35:24,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:35:24,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 88 [2023-11-23 22:35:24,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 54 transitions, 275 flow. Second operand has 11 states, 11 states have (on average 22.454545454545453) internal successors, (247), 11 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:24,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:24,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 88 [2023-11-23 22:35:24,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:26,152 INFO L124 PetriNetUnfolderBase]: 1669/3060 cut-off events. [2023-11-23 22:35:26,153 INFO L125 PetriNetUnfolderBase]: For 3716/3765 co-relation queries the response was YES. [2023-11-23 22:35:26,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9223 conditions, 3060 events. 1669/3060 cut-off events. For 3716/3765 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22306 event pairs, 576 based on Foata normal form. 38/3023 useless extension candidates. Maximal degree in co-relation 9191. Up to 1808 conditions per place. [2023-11-23 22:35:26,171 INFO L140 encePairwiseOnDemand]: 77/88 looper letters, 52 selfloop transitions, 19 changer transitions 34/121 dead transitions. [2023-11-23 22:35:26,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 121 transitions, 832 flow [2023-11-23 22:35:26,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 22:35:26,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-23 22:35:26,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 384 transitions. [2023-11-23 22:35:26,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3116883116883117 [2023-11-23 22:35:26,175 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 384 transitions. [2023-11-23 22:35:26,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 384 transitions. [2023-11-23 22:35:26,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:26,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 384 transitions. [2023-11-23 22:35:26,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 27.428571428571427) internal successors, (384), 14 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:26,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 88.0) internal successors, (1320), 15 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:26,181 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 88.0) internal successors, (1320), 15 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:26,182 INFO L175 Difference]: Start difference. First operand has 87 places, 54 transitions, 275 flow. Second operand 14 states and 384 transitions. [2023-11-23 22:35:26,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 121 transitions, 832 flow [2023-11-23 22:35:26,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 121 transitions, 764 flow, removed 18 selfloop flow, removed 8 redundant places. [2023-11-23 22:35:26,194 INFO L231 Difference]: Finished difference. Result has 96 places, 67 transitions, 429 flow [2023-11-23 22:35:26,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=429, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2023-11-23 22:35:26,195 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 3 predicate places. [2023-11-23 22:35:26,195 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 429 flow [2023-11-23 22:35:26,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.454545454545453) internal successors, (247), 11 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:26,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:26,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:26,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-23 22:35:26,197 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-23 22:35:26,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:26,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1366484715, now seen corresponding path program 1 times [2023-11-23 22:35:26,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:26,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457124048] [2023-11-23 22:35:26,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:26,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat