./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe020_rmo.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93887c7e-159c-4848-b3e0-207378d704f8/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93887c7e-159c-4848-b3e0-207378d704f8/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93887c7e-159c-4848-b3e0-207378d704f8/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93887c7e-159c-4848-b3e0-207378d704f8/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe020_rmo.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93887c7e-159c-4848-b3e0-207378d704f8/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93887c7e-159c-4848-b3e0-207378d704f8/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d52a8576f41904f21a1a217cd81ed2d36ac8928d5a02d745a0c93a101e2535cf --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:44:01,010 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:44:01,104 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93887c7e-159c-4848-b3e0-207378d704f8/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:44:01,111 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:44:01,112 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:44:01,155 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:44:01,160 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:44:01,161 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:44:01,162 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:44:01,168 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:44:01,169 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:44:01,170 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:44:01,170 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:44:01,172 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:44:01,173 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:44:01,173 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:44:01,174 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:44:01,174 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:44:01,175 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:44:01,175 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:44:01,176 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:44:01,176 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:44:01,177 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:44:01,178 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:44:01,179 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:44:01,179 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:44:01,180 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:44:01,181 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:44:01,181 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:44:01,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:44:01,183 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:44:01,184 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:44:01,184 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:44:01,184 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:44:01,185 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:44:01,185 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:44:01,193 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:44:01,193 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:44:01,193 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_93887c7e-159c-4848-b3e0-207378d704f8/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93887c7e-159c-4848-b3e0-207378d704f8/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d52a8576f41904f21a1a217cd81ed2d36ac8928d5a02d745a0c93a101e2535cf [2023-11-19 07:44:01,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:44:01,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:44:01,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:44:01,567 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:44:01,568 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:44:01,569 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93887c7e-159c-4848-b3e0-207378d704f8/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-wmm/safe020_rmo.i [2023-11-19 07:44:04,703 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:44:05,107 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:44:05,108 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93887c7e-159c-4848-b3e0-207378d704f8/sv-benchmarks/c/pthread-wmm/safe020_rmo.i [2023-11-19 07:44:05,136 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93887c7e-159c-4848-b3e0-207378d704f8/bin/uautomizer-verify-uCwYo4JHxu/data/a445c1ecc/ba33617005dc42c68cea66035db8090d/FLAG75a82d2f2 [2023-11-19 07:44:05,157 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93887c7e-159c-4848-b3e0-207378d704f8/bin/uautomizer-verify-uCwYo4JHxu/data/a445c1ecc/ba33617005dc42c68cea66035db8090d [2023-11-19 07:44:05,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:44:05,169 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:44:05,176 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:05,176 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:44:05,183 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:44:05,185 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:05" (1/1) ... [2023-11-19 07:44:05,187 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb01cd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:05, skipping insertion in model container [2023-11-19 07:44:05,187 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:05" (1/1) ... [2023-11-19 07:44:05,248 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:44:05,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:05,831 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:44:05,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:06,039 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:44:06,040 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:44:06,049 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:44:06,050 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:06 WrapperNode [2023-11-19 07:44:06,050 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:06,052 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:06,052 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:44:06,052 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:44:06,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:06" (1/1) ... [2023-11-19 07:44:06,108 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:06" (1/1) ... [2023-11-19 07:44:06,167 INFO L138 Inliner]: procedures = 176, calls = 76, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 138 [2023-11-19 07:44:06,168 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:06,169 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:44:06,169 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:44:06,170 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:44:06,182 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:06" (1/1) ... [2023-11-19 07:44:06,182 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:06" (1/1) ... [2023-11-19 07:44:06,205 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:06" (1/1) ... [2023-11-19 07:44:06,206 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:06" (1/1) ... [2023-11-19 07:44:06,235 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:06" (1/1) ... [2023-11-19 07:44:06,238 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:06" (1/1) ... [2023-11-19 07:44:06,241 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:06" (1/1) ... [2023-11-19 07:44:06,244 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:06" (1/1) ... [2023-11-19 07:44:06,250 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:44:06,266 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:44:06,266 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:44:06,266 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:44:06,267 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:06" (1/1) ... [2023-11-19 07:44:06,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:44:06,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93887c7e-159c-4848-b3e0-207378d704f8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:06,341 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93887c7e-159c-4848-b3e0-207378d704f8/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:06,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93887c7e-159c-4848-b3e0-207378d704f8/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:44:06,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:44:06,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:44:06,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:44:06,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:44:06,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:44:06,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:44:06,476 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-19 07:44:06,476 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-19 07:44:06,476 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-19 07:44:06,477 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-19 07:44:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-19 07:44:06,477 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-19 07:44:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:44:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:44:06,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:44:06,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:44:06,481 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:44:06,675 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:44:06,679 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:44:07,394 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:44:07,900 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:44:07,900 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 07:44:07,907 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:07 BoogieIcfgContainer [2023-11-19 07:44:07,908 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:44:07,912 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:44:07,913 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:44:07,917 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:44:07,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:44:05" (1/3) ... [2023-11-19 07:44:07,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c9182d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:07, skipping insertion in model container [2023-11-19 07:44:07,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:06" (2/3) ... [2023-11-19 07:44:07,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c9182d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:07, skipping insertion in model container [2023-11-19 07:44:07,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:07" (3/3) ... [2023-11-19 07:44:07,923 INFO L112 eAbstractionObserver]: Analyzing ICFG safe020_rmo.i [2023-11-19 07:44:07,944 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:44:07,944 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2023-11-19 07:44:07,945 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:44:08,118 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:44:08,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 192 transitions, 396 flow [2023-11-19 07:44:08,272 INFO L124 PetriNetUnfolderBase]: 12/189 cut-off events. [2023-11-19 07:44:08,272 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:44:08,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 189 events. 12/189 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 287 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 133. Up to 2 conditions per place. [2023-11-19 07:44:08,285 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 192 transitions, 396 flow [2023-11-19 07:44:08,294 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 189 transitions, 387 flow [2023-11-19 07:44:08,298 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:44:08,308 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 187 places, 189 transitions, 387 flow [2023-11-19 07:44:08,311 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 187 places, 189 transitions, 387 flow [2023-11-19 07:44:08,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 189 transitions, 387 flow [2023-11-19 07:44:08,387 INFO L124 PetriNetUnfolderBase]: 12/189 cut-off events. [2023-11-19 07:44:08,387 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:44:08,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 189 events. 12/189 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 293 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 133. Up to 2 conditions per place. [2023-11-19 07:44:08,400 INFO L119 LiptonReduction]: Number of co-enabled transitions 9510 [2023-11-19 07:44:19,922 INFO L134 LiptonReduction]: Checked pairs total: 36813 [2023-11-19 07:44:19,922 INFO L136 LiptonReduction]: Total number of compositions: 173 [2023-11-19 07:44:19,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:44:19,946 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;@7454d0e7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:44:19,946 INFO L358 AbstractCegarLoop]: Starting to check reachability of 85 error locations. [2023-11-19 07:44:19,948 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:44:19,948 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 07:44:19,948 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:44:19,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:19,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:44:19,949 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-19 07:44:19,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:19,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1073, now seen corresponding path program 1 times [2023-11-19 07:44:19,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:19,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664403711] [2023-11-19 07:44:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:19,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:20,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:20,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664403711] [2023-11-19 07:44:20,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664403711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:20,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:20,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:44:20,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431164986] [2023-11-19 07:44:20,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:20,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:44:20,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:20,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:44:20,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:44:20,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 365 [2023-11-19 07:44:20,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 76 transitions, 161 flow. Second operand has 2 states, 2 states have (on average 129.5) internal successors, (259), 2 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:20,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:20,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 365 [2023-11-19 07:44:20,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:26,327 INFO L124 PetriNetUnfolderBase]: 23428/32687 cut-off events. [2023-11-19 07:44:26,327 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-19 07:44:26,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65453 conditions, 32687 events. 23428/32687 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 2510. Compared 216115 event pairs, 23428 based on Foata normal form. 0/13853 useless extension candidates. Maximal degree in co-relation 65442. Up to 32628 conditions per place. [2023-11-19 07:44:26,600 INFO L140 encePairwiseOnDemand]: 337/365 looper letters, 45 selfloop transitions, 0 changer transitions 0/46 dead transitions. [2023-11-19 07:44:26,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 46 transitions, 191 flow [2023-11-19 07:44:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:44:26,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:44:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 331 transitions. [2023-11-19 07:44:26,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4534246575342466 [2023-11-19 07:44:26,628 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 331 transitions. [2023-11-19 07:44:26,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 331 transitions. [2023-11-19 07:44:26,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:26,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 331 transitions. [2023-11-19 07:44:26,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 165.5) internal successors, (331), 2 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:26,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 365.0) internal successors, (1095), 3 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:26,651 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 365.0) internal successors, (1095), 3 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:26,653 INFO L175 Difference]: Start difference. First operand has 84 places, 76 transitions, 161 flow. Second operand 2 states and 331 transitions. [2023-11-19 07:44:26,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 46 transitions, 191 flow [2023-11-19 07:44:26,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 46 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:44:26,665 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 98 flow [2023-11-19 07:44:26,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=98, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2023-11-19 07:44:26,673 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -30 predicate places. [2023-11-19 07:44:26,674 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 98 flow [2023-11-19 07:44:26,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 129.5) internal successors, (259), 2 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:26,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:26,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:44:26,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:44:26,675 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-19 07:44:26,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:26,687 INFO L85 PathProgramCache]: Analyzing trace with hash 32893141, now seen corresponding path program 1 times [2023-11-19 07:44:26,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:26,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898458008] [2023-11-19 07:44:26,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:26,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:27,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:27,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898458008] [2023-11-19 07:44:27,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898458008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:27,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:27,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:44:27,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528536226] [2023-11-19 07:44:27,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:27,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:27,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:27,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:27,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:27,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 365 [2023-11-19 07:44:27,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:27,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:27,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 365 [2023-11-19 07:44:27,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:31,437 INFO L124 PetriNetUnfolderBase]: 14811/21812 cut-off events. [2023-11-19 07:44:31,437 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:44:31,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43434 conditions, 21812 events. 14811/21812 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1483. Compared 147263 event pairs, 9091 based on Foata normal form. 0/11792 useless extension candidates. Maximal degree in co-relation 43431. Up to 13032 conditions per place. [2023-11-19 07:44:31,572 INFO L140 encePairwiseOnDemand]: 346/365 looper letters, 52 selfloop transitions, 10 changer transitions 0/63 dead transitions. [2023-11-19 07:44:31,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 63 transitions, 256 flow [2023-11-19 07:44:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:31,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:44:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2023-11-19 07:44:31,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40730593607305937 [2023-11-19 07:44:31,578 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2023-11-19 07:44:31,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2023-11-19 07:44:31,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:31,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2023-11-19 07:44:31,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:31,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:31,589 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:31,591 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 98 flow. Second operand 3 states and 446 transitions. [2023-11-19 07:44:31,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 63 transitions, 256 flow [2023-11-19 07:44:31,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 63 transitions, 256 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:44:31,595 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 180 flow [2023-11-19 07:44:31,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2023-11-19 07:44:31,597 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -28 predicate places. [2023-11-19 07:44:31,598 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 180 flow [2023-11-19 07:44:31,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:31,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:31,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:44:31,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:44:31,606 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-19 07:44:31,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:31,609 INFO L85 PathProgramCache]: Analyzing trace with hash 32893142, now seen corresponding path program 1 times [2023-11-19 07:44:31,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:31,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425430276] [2023-11-19 07:44:31,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:31,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:31,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:31,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425430276] [2023-11-19 07:44:31,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425430276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:31,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:31,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:44:31,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34974043] [2023-11-19 07:44:31,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:31,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:31,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:31,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:31,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:31,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 365 [2023-11-19 07:44:31,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:31,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:31,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 365 [2023-11-19 07:44:31,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:33,082 INFO L124 PetriNetUnfolderBase]: 4316/6749 cut-off events. [2023-11-19 07:44:33,082 INFO L125 PetriNetUnfolderBase]: For 2019/2019 co-relation queries the response was YES. [2023-11-19 07:44:33,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19179 conditions, 6749 events. 4316/6749 cut-off events. For 2019/2019 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 41550 event pairs, 3129 based on Foata normal form. 1935/7754 useless extension candidates. Maximal degree in co-relation 19174. Up to 6593 conditions per place. [2023-11-19 07:44:33,131 INFO L140 encePairwiseOnDemand]: 355/365 looper letters, 41 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-11-19 07:44:33,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 246 flow [2023-11-19 07:44:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:44:33,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 427 transitions. [2023-11-19 07:44:33,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38995433789954337 [2023-11-19 07:44:33,134 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 427 transitions. [2023-11-19 07:44:33,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 427 transitions. [2023-11-19 07:44:33,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:33,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 427 transitions. [2023-11-19 07:44:33,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:33,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:33,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:33,142 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 180 flow. Second operand 3 states and 427 transitions. [2023-11-19 07:44:33,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 246 flow [2023-11-19 07:44:33,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 43 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:44:33,163 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 144 flow [2023-11-19 07:44:33,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-11-19 07:44:33,164 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -37 predicate places. [2023-11-19 07:44:33,165 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 144 flow [2023-11-19 07:44:33,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:33,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:33,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:33,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:44:33,166 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-19 07:44:33,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:33,167 INFO L85 PathProgramCache]: Analyzing trace with hash 630634742, now seen corresponding path program 1 times [2023-11-19 07:44:33,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:33,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747790209] [2023-11-19 07:44:33,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:33,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:33,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:33,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747790209] [2023-11-19 07:44:33,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747790209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:33,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:33,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:44:33,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929058216] [2023-11-19 07:44:33,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:33,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:33,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:33,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:33,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:33,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 365 [2023-11-19 07:44:33,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:33,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:33,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 365 [2023-11-19 07:44:33,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:34,512 INFO L124 PetriNetUnfolderBase]: 4236/6701 cut-off events. [2023-11-19 07:44:34,513 INFO L125 PetriNetUnfolderBase]: For 827/827 co-relation queries the response was YES. [2023-11-19 07:44:34,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17552 conditions, 6701 events. 4236/6701 cut-off events. For 827/827 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 42122 event pairs, 1469 based on Foata normal form. 0/5063 useless extension candidates. Maximal degree in co-relation 17547. Up to 4987 conditions per place. [2023-11-19 07:44:34,559 INFO L140 encePairwiseOnDemand]: 361/365 looper letters, 63 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-11-19 07:44:34,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 67 transitions, 358 flow [2023-11-19 07:44:34,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:34,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:44:34,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 438 transitions. [2023-11-19 07:44:34,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-19 07:44:34,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 438 transitions. [2023-11-19 07:44:34,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 438 transitions. [2023-11-19 07:44:34,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:34,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 438 transitions. [2023-11-19 07:44:34,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:34,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:34,571 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:34,571 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 144 flow. Second operand 3 states and 438 transitions. [2023-11-19 07:44:34,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 67 transitions, 358 flow [2023-11-19 07:44:34,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 67 transitions, 357 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:44:34,576 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 156 flow [2023-11-19 07:44:34,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-11-19 07:44:34,579 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -35 predicate places. [2023-11-19 07:44:34,579 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 156 flow [2023-11-19 07:44:34,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:34,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:34,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:34,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:44:34,581 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-19 07:44:34,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:34,581 INFO L85 PathProgramCache]: Analyzing trace with hash 630635011, now seen corresponding path program 1 times [2023-11-19 07:44:34,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:34,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499949801] [2023-11-19 07:44:34,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:34,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:34,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:34,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499949801] [2023-11-19 07:44:34,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499949801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:34,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:34,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:44:34,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12211837] [2023-11-19 07:44:34,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:34,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:34,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:34,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:34,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:34,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 365 [2023-11-19 07:44:34,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:34,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:34,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 365 [2023-11-19 07:44:34,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:36,003 INFO L124 PetriNetUnfolderBase]: 5080/7709 cut-off events. [2023-11-19 07:44:36,003 INFO L125 PetriNetUnfolderBase]: For 1619/1619 co-relation queries the response was YES. [2023-11-19 07:44:36,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21060 conditions, 7709 events. 5080/7709 cut-off events. For 1619/1619 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 45856 event pairs, 1373 based on Foata normal form. 0/6077 useless extension candidates. Maximal degree in co-relation 21054. Up to 7328 conditions per place. [2023-11-19 07:44:36,072 INFO L140 encePairwiseOnDemand]: 361/365 looper letters, 71 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-11-19 07:44:36,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 74 transitions, 414 flow [2023-11-19 07:44:36,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:36,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:44:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-11-19 07:44:36,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4009132420091324 [2023-11-19 07:44:36,076 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-11-19 07:44:36,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-11-19 07:44:36,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:36,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-11-19 07:44:36,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:36,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:36,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:36,085 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 156 flow. Second operand 3 states and 439 transitions. [2023-11-19 07:44:36,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 74 transitions, 414 flow [2023-11-19 07:44:36,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 74 transitions, 404 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:44:36,092 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 169 flow [2023-11-19 07:44:36,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-11-19 07:44:36,097 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -34 predicate places. [2023-11-19 07:44:36,097 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 169 flow [2023-11-19 07:44:36,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:36,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:36,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:36,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:44:36,099 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-19 07:44:36,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:36,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1925152002, now seen corresponding path program 1 times [2023-11-19 07:44:36,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:36,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57159765] [2023-11-19 07:44:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:36,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:36,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:36,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57159765] [2023-11-19 07:44:36,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57159765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:36,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:36,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:44:36,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31862968] [2023-11-19 07:44:36,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:36,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:44:36,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:36,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:44:36,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:44:36,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 365 [2023-11-19 07:44:36,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:36,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:36,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 365 [2023-11-19 07:44:36,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:38,218 INFO L124 PetriNetUnfolderBase]: 4597/7122 cut-off events. [2023-11-19 07:44:38,218 INFO L125 PetriNetUnfolderBase]: For 1469/1469 co-relation queries the response was YES. [2023-11-19 07:44:38,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20159 conditions, 7122 events. 4597/7122 cut-off events. For 1469/1469 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 43750 event pairs, 1555 based on Foata normal form. 12/5430 useless extension candidates. Maximal degree in co-relation 20152. Up to 5452 conditions per place. [2023-11-19 07:44:38,292 INFO L140 encePairwiseOnDemand]: 362/365 looper letters, 63 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2023-11-19 07:44:38,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 68 transitions, 384 flow [2023-11-19 07:44:38,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:44:38,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2023-11-19 07:44:38,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39817351598173517 [2023-11-19 07:44:38,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2023-11-19 07:44:38,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2023-11-19 07:44:38,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:38,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2023-11-19 07:44:38,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:38,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:38,308 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:38,308 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 169 flow. Second operand 3 states and 436 transitions. [2023-11-19 07:44:38,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 68 transitions, 384 flow [2023-11-19 07:44:38,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:44:38,316 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 177 flow [2023-11-19 07:44:38,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2023-11-19 07:44:38,320 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -32 predicate places. [2023-11-19 07:44:38,325 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 177 flow [2023-11-19 07:44:38,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:38,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:38,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:38,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:44:38,327 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-19 07:44:38,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:38,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1925153728, now seen corresponding path program 1 times [2023-11-19 07:44:38,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:38,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172209720] [2023-11-19 07:44:38,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:38,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:38,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:38,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172209720] [2023-11-19 07:44:38,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172209720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:38,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:38,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:44:38,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081155484] [2023-11-19 07:44:38,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:38,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:38,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:38,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:38,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:38,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 365 [2023-11-19 07:44:38,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:38,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:38,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 365 [2023-11-19 07:44:38,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:40,392 INFO L124 PetriNetUnfolderBase]: 5320/8279 cut-off events. [2023-11-19 07:44:40,393 INFO L125 PetriNetUnfolderBase]: For 2247/2247 co-relation queries the response was YES. [2023-11-19 07:44:40,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23741 conditions, 8279 events. 5320/8279 cut-off events. For 2247/2247 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 52241 event pairs, 2028 based on Foata normal form. 0/6534 useless extension candidates. Maximal degree in co-relation 23733. Up to 6086 conditions per place. [2023-11-19 07:44:40,471 INFO L140 encePairwiseOnDemand]: 359/365 looper letters, 52 selfloop transitions, 6 changer transitions 0/60 dead transitions. [2023-11-19 07:44:40,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 60 transitions, 341 flow [2023-11-19 07:44:40,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:40,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:44:40,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2023-11-19 07:44:40,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3872146118721461 [2023-11-19 07:44:40,479 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2023-11-19 07:44:40,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2023-11-19 07:44:40,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:40,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2023-11-19 07:44:40,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:40,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:40,489 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:40,490 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 177 flow. Second operand 3 states and 424 transitions. [2023-11-19 07:44:40,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 60 transitions, 341 flow [2023-11-19 07:44:40,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 335 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:44:40,499 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 209 flow [2023-11-19 07:44:40,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2023-11-19 07:44:40,501 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -32 predicate places. [2023-11-19 07:44:40,502 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 209 flow [2023-11-19 07:44:40,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:40,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:40,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:40,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:44:40,504 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-19 07:44:40,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:40,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1925153727, now seen corresponding path program 1 times [2023-11-19 07:44:40,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:40,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099800596] [2023-11-19 07:44:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:40,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:40,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:40,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099800596] [2023-11-19 07:44:40,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099800596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:40,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:40,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:44:40,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303738406] [2023-11-19 07:44:40,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:40,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:44:40,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:40,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:44:40,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:44:40,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 365 [2023-11-19 07:44:40,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:40,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:40,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 365 [2023-11-19 07:44:40,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:42,820 INFO L124 PetriNetUnfolderBase]: 5195/8094 cut-off events. [2023-11-19 07:44:42,820 INFO L125 PetriNetUnfolderBase]: For 3645/3645 co-relation queries the response was YES. [2023-11-19 07:44:42,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24590 conditions, 8094 events. 5195/8094 cut-off events. For 3645/3645 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 51107 event pairs, 1542 based on Foata normal form. 48/6397 useless extension candidates. Maximal degree in co-relation 24581. Up to 6423 conditions per place. [2023-11-19 07:44:42,887 INFO L140 encePairwiseOnDemand]: 362/365 looper letters, 64 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-11-19 07:44:42,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 69 transitions, 423 flow [2023-11-19 07:44:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:44:42,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:44:42,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 558 transitions. [2023-11-19 07:44:42,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821917808219178 [2023-11-19 07:44:42,893 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 558 transitions. [2023-11-19 07:44:42,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 558 transitions. [2023-11-19 07:44:42,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:42,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 558 transitions. [2023-11-19 07:44:42,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:42,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 365.0) internal successors, (1825), 5 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:42,904 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 365.0) internal successors, (1825), 5 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:42,904 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 209 flow. Second operand 4 states and 558 transitions. [2023-11-19 07:44:42,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 69 transitions, 423 flow [2023-11-19 07:44:42,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 69 transitions, 414 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:44:42,974 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 202 flow [2023-11-19 07:44:42,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-11-19 07:44:42,976 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -32 predicate places. [2023-11-19 07:44:42,976 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 202 flow [2023-11-19 07:44:42,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:42,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:42,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:42,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:44:42,978 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-19 07:44:42,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:42,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1736263796, now seen corresponding path program 1 times [2023-11-19 07:44:42,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:42,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678781871] [2023-11-19 07:44:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:42,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:44,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:44,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678781871] [2023-11-19 07:44:44,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678781871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:44,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:44,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:44:44,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155201840] [2023-11-19 07:44:44,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:44,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:44:44,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:44,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:44:44,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:44:45,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 365 [2023-11-19 07:44:45,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 202 flow. Second operand has 9 states, 9 states have (on average 113.44444444444444) internal successors, (1021), 9 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:45,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:45,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 365 [2023-11-19 07:44:45,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:46,620 INFO L124 PetriNetUnfolderBase]: 4999/7815 cut-off events. [2023-11-19 07:44:46,620 INFO L125 PetriNetUnfolderBase]: For 3479/3479 co-relation queries the response was YES. [2023-11-19 07:44:46,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23381 conditions, 7815 events. 4999/7815 cut-off events. For 3479/3479 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 49145 event pairs, 1395 based on Foata normal form. 15/6198 useless extension candidates. Maximal degree in co-relation 23373. Up to 6037 conditions per place. [2023-11-19 07:44:46,677 INFO L140 encePairwiseOnDemand]: 355/365 looper letters, 102 selfloop transitions, 31 changer transitions 0/135 dead transitions. [2023-11-19 07:44:46,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 135 transitions, 829 flow [2023-11-19 07:44:46,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:44:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:44:46,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1222 transitions. [2023-11-19 07:44:46,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33479452054794523 [2023-11-19 07:44:46,685 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1222 transitions. [2023-11-19 07:44:46,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1222 transitions. [2023-11-19 07:44:46,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:46,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1222 transitions. [2023-11-19 07:44:46,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 122.2) internal successors, (1222), 10 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:46,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 365.0) internal successors, (4015), 11 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:46,702 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 365.0) internal successors, (4015), 11 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:46,702 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 202 flow. Second operand 10 states and 1222 transitions. [2023-11-19 07:44:46,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 135 transitions, 829 flow [2023-11-19 07:44:46,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 135 transitions, 820 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:44:46,724 INFO L231 Difference]: Finished difference. Result has 64 places, 74 transitions, 461 flow [2023-11-19 07:44:46,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=461, PETRI_PLACES=64, PETRI_TRANSITIONS=74} [2023-11-19 07:44:46,725 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -20 predicate places. [2023-11-19 07:44:46,726 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 74 transitions, 461 flow [2023-11-19 07:44:46,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 113.44444444444444) internal successors, (1021), 9 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:46,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:46,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:46,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:44:46,727 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting P2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-19 07:44:46,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:46,728 INFO L85 PathProgramCache]: Analyzing trace with hash 449881998, now seen corresponding path program 1 times [2023-11-19 07:44:46,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:46,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423136892] [2023-11-19 07:44:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:46,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:46,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:46,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423136892] [2023-11-19 07:44:46,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423136892] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:46,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:46,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:44:46,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69989328] [2023-11-19 07:44:46,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:46,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:44:46,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:46,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:44:46,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:44:47,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 365 [2023-11-19 07:44:47,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 74 transitions, 461 flow. Second operand has 5 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:47,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:47,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 365 [2023-11-19 07:44:47,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:48,350 INFO L124 PetriNetUnfolderBase]: 4344/6776 cut-off events. [2023-11-19 07:44:48,350 INFO L125 PetriNetUnfolderBase]: For 5412/5424 co-relation queries the response was YES. [2023-11-19 07:44:48,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22920 conditions, 6776 events. 4344/6776 cut-off events. For 5412/5424 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 41178 event pairs, 1363 based on Foata normal form. 56/5661 useless extension candidates. Maximal degree in co-relation 22907. Up to 2801 conditions per place. [2023-11-19 07:44:48,399 INFO L140 encePairwiseOnDemand]: 349/365 looper letters, 72 selfloop transitions, 24 changer transitions 0/98 dead transitions. [2023-11-19 07:44:48,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 98 transitions, 773 flow [2023-11-19 07:44:48,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:44:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:44:48,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 539 transitions. [2023-11-19 07:44:48,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36917808219178083 [2023-11-19 07:44:48,403 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 539 transitions. [2023-11-19 07:44:48,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 539 transitions. [2023-11-19 07:44:48,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:48,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 539 transitions. [2023-11-19 07:44:48,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:48,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 365.0) internal successors, (1825), 5 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:48,411 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 365.0) internal successors, (1825), 5 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:48,412 INFO L175 Difference]: Start difference. First operand has 64 places, 74 transitions, 461 flow. Second operand 4 states and 539 transitions. [2023-11-19 07:44:48,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 98 transitions, 773 flow [2023-11-19 07:44:48,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 98 transitions, 769 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:44:48,452 INFO L231 Difference]: Finished difference. Result has 68 places, 81 transitions, 607 flow [2023-11-19 07:44:48,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=607, PETRI_PLACES=68, PETRI_TRANSITIONS=81} [2023-11-19 07:44:48,453 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -16 predicate places. [2023-11-19 07:44:48,453 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 81 transitions, 607 flow [2023-11-19 07:44:48,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:48,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:48,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:48,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:44:48,455 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-19 07:44:48,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:48,455 INFO L85 PathProgramCache]: Analyzing trace with hash 516766929, now seen corresponding path program 1 times [2023-11-19 07:44:48,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:48,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578333411] [2023-11-19 07:44:48,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:48,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:48,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:48,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578333411] [2023-11-19 07:44:48,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578333411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:48,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:48,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:44:48,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402089116] [2023-11-19 07:44:48,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:48,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:48,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:48,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:48,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:48,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 365 [2023-11-19 07:44:48,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 81 transitions, 607 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:48,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:48,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 365 [2023-11-19 07:44:48,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand