./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/04_incdec_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b18e81-f962-49fd-a71b-16feeef2ecbd/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b18e81-f962-49fd-a71b-16feeef2ecbd/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_09b18e81-f962-49fd-a71b-16feeef2ecbd/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b18e81-f962-49fd-a71b-16feeef2ecbd/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/04_incdec_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b18e81-f962-49fd-a71b-16feeef2ecbd/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_09b18e81-f962-49fd-a71b-16feeef2ecbd/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 a9295efc0d8bacfc5fb202511f0d3721ae5554ffb4def47cf5dbf45088356869 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:49:02,127 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:49:02,239 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b18e81-f962-49fd-a71b-16feeef2ecbd/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:49:02,246 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:49:02,247 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:49:02,290 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:49:02,291 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:49:02,292 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:49:02,293 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:49:02,298 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:49:02,298 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:49:02,299 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:49:02,299 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:49:02,301 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:49:02,301 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:49:02,302 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:49:02,302 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:49:02,303 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:49:02,303 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:49:02,303 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:49:02,304 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:49:02,305 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:49:02,305 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:49:02,305 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:49:02,306 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:49:02,306 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:49:02,307 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:49:02,308 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:49:02,308 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:49:02,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:49:02,310 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:49:02,310 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:49:02,310 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:49:02,311 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:49:02,311 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:49:02,311 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:49:02,311 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:49:02,312 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:49:02,312 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_09b18e81-f962-49fd-a71b-16feeef2ecbd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b18e81-f962-49fd-a71b-16feeef2ecbd/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9295efc0d8bacfc5fb202511f0d3721ae5554ffb4def47cf5dbf45088356869 [2023-11-19 07:49:02,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:49:02,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:49:02,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:49:02,706 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:49:02,707 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:49:02,708 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b18e81-f962-49fd-a71b-16feeef2ecbd/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2023-11-19 07:49:05,863 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:49:06,161 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:49:06,161 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b18e81-f962-49fd-a71b-16feeef2ecbd/sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2023-11-19 07:49:06,182 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b18e81-f962-49fd-a71b-16feeef2ecbd/bin/uautomizer-verify-uCwYo4JHxu/data/f899082e5/c763fffbe22c4827b4c0c3f7302a1537/FLAG88438da6d [2023-11-19 07:49:06,200 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b18e81-f962-49fd-a71b-16feeef2ecbd/bin/uautomizer-verify-uCwYo4JHxu/data/f899082e5/c763fffbe22c4827b4c0c3f7302a1537 [2023-11-19 07:49:06,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:49:06,206 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:49:06,208 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:49:06,208 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:49:06,220 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:49:06,221 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:49:06" (1/1) ... [2023-11-19 07:49:06,223 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26524631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:06, skipping insertion in model container [2023-11-19 07:49:06,223 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:49:06" (1/1) ... [2023-11-19 07:49:06,311 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:49:06,823 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:49:06,837 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:49:06,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:49:06,947 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:49:06,947 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:49:06,958 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:49:06,958 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:06 WrapperNode [2023-11-19 07:49:06,959 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:49:06,960 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:49:06,961 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:49:06,961 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:49:06,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:06" (1/1) ... [2023-11-19 07:49:06,989 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:06" (1/1) ... [2023-11-19 07:49:07,024 INFO L138 Inliner]: procedures = 174, calls = 49, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 168 [2023-11-19 07:49:07,024 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:49:07,025 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:49:07,026 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:49:07,026 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:49:07,038 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:06" (1/1) ... [2023-11-19 07:49:07,039 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:06" (1/1) ... [2023-11-19 07:49:07,044 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:06" (1/1) ... [2023-11-19 07:49:07,045 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:06" (1/1) ... [2023-11-19 07:49:07,055 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:06" (1/1) ... [2023-11-19 07:49:07,060 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:06" (1/1) ... [2023-11-19 07:49:07,063 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:06" (1/1) ... [2023-11-19 07:49:07,066 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:06" (1/1) ... [2023-11-19 07:49:07,071 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:49:07,073 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:49:07,073 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:49:07,073 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:49:07,074 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:06" (1/1) ... [2023-11-19 07:49:07,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:49:07,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b18e81-f962-49fd-a71b-16feeef2ecbd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:07,129 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b18e81-f962-49fd-a71b-16feeef2ecbd/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:49:07,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b18e81-f962-49fd-a71b-16feeef2ecbd/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:49:07,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:49:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 07:49:07,187 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 07:49:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:49:07,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:49:07,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:49:07,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:49:07,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:49:07,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:49:07,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:49:07,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:49:07,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:49:07,191 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 07:49:07,342 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:49:07,344 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:49:07,877 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:49:08,406 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:49:08,406 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:49:08,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:49:08 BoogieIcfgContainer [2023-11-19 07:49:08,414 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:49:08,418 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:49:08,418 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:49:08,422 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:49:08,423 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:49:06" (1/3) ... [2023-11-19 07:49:08,424 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25da3ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:49:08, skipping insertion in model container [2023-11-19 07:49:08,425 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:06" (2/3) ... [2023-11-19 07:49:08,426 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25da3ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:49:08, skipping insertion in model container [2023-11-19 07:49:08,426 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:49:08" (3/3) ... [2023-11-19 07:49:08,428 INFO L112 eAbstractionObserver]: Analyzing ICFG 04_incdec_cas.i [2023-11-19 07:49:08,452 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:49:08,452 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2023-11-19 07:49:08,454 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:49:08,734 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:49:08,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 148 transitions, 300 flow [2023-11-19 07:49:08,952 INFO L124 PetriNetUnfolderBase]: 19/164 cut-off events. [2023-11-19 07:49:08,955 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:49:08,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 164 events. 19/164 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 586 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 127. Up to 6 conditions per place. [2023-11-19 07:49:08,968 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 148 transitions, 300 flow [2023-11-19 07:49:08,983 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 148 transitions, 300 flow [2023-11-19 07:49:08,988 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:49:09,009 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 148 transitions, 300 flow [2023-11-19 07:49:09,013 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 148 transitions, 300 flow [2023-11-19 07:49:09,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 148 transitions, 300 flow [2023-11-19 07:49:09,085 INFO L124 PetriNetUnfolderBase]: 19/164 cut-off events. [2023-11-19 07:49:09,085 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:49:09,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 164 events. 19/164 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 586 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 127. Up to 6 conditions per place. [2023-11-19 07:49:09,098 INFO L119 LiptonReduction]: Number of co-enabled transitions 4142 [2023-11-19 07:49:15,974 INFO L134 LiptonReduction]: Checked pairs total: 8374 [2023-11-19 07:49:15,974 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-11-19 07:49:15,995 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:49:16,004 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;@6038cd82, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:49:16,005 INFO L358 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2023-11-19 07:49:16,008 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:49:16,008 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-19 07:49:16,008 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:49:16,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:16,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:49:16,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-19 07:49:16,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:16,018 INFO L85 PathProgramCache]: Analyzing trace with hash 28257, now seen corresponding path program 1 times [2023-11-19 07:49:16,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:16,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729744535] [2023-11-19 07:49:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:16,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:16,427 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 07:49:16,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:16,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729744535] [2023-11-19 07:49:16,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729744535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:16,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:16,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:49:16,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503728234] [2023-11-19 07:49:16,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:16,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:16,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:16,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:16,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:16,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 268 [2023-11-19 07:49:16,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 69 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 07:49:16,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:16,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 268 [2023-11-19 07:49:16,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:16,886 INFO L124 PetriNetUnfolderBase]: 143/325 cut-off events. [2023-11-19 07:49:16,887 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:49:16,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 325 events. 143/325 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 1722 event pairs, 123 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 628. Up to 314 conditions per place. [2023-11-19 07:49:16,896 INFO L140 encePairwiseOnDemand]: 255/268 looper letters, 50 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-11-19 07:49:16,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 214 flow [2023-11-19 07:49:16,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:16,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-11-19 07:49:16,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40671641791044777 [2023-11-19 07:49:16,932 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-11-19 07:49:16,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-11-19 07:49:16,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:16,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-11-19 07:49:16,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states 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 07:49:16,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 07:49:16,961 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 07:49:16,964 INFO L175 Difference]: Start difference. First operand has 65 places, 69 transitions, 142 flow. Second operand 3 states and 327 transitions. [2023-11-19 07:49:16,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 214 flow [2023-11-19 07:49:16,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:49:16,973 INFO L231 Difference]: Finished difference. Result has 54 places, 54 transitions, 114 flow [2023-11-19 07:49:16,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=54, PETRI_TRANSITIONS=54} [2023-11-19 07:49:16,982 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -11 predicate places. [2023-11-19 07:49:16,983 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 54 transitions, 114 flow [2023-11-19 07:49:16,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 07:49:16,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:16,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:49:16,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:49:16,985 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-19 07:49:17,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:17,000 INFO L85 PathProgramCache]: Analyzing trace with hash 28258, now seen corresponding path program 1 times [2023-11-19 07:49:17,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:17,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646646137] [2023-11-19 07:49:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:17,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:17,146 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 07:49:17,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:17,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646646137] [2023-11-19 07:49:17,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646646137] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:17,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:17,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:49:17,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999164275] [2023-11-19 07:49:17,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:17,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:17,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:17,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:17,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:17,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 268 [2023-11-19 07:49:17,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 07:49:17,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:17,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 268 [2023-11-19 07:49:17,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:17,445 INFO L124 PetriNetUnfolderBase]: 96/236 cut-off events. [2023-11-19 07:49:17,446 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:49:17,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 469 conditions, 236 events. 96/236 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1226 event pairs, 80 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 462. Up to 212 conditions per place. [2023-11-19 07:49:17,449 INFO L140 encePairwiseOnDemand]: 261/268 looper letters, 47 selfloop transitions, 6 changer transitions 0/56 dead transitions. [2023-11-19 07:49:17,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 56 transitions, 224 flow [2023-11-19 07:49:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:17,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:17,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2023-11-19 07:49:17,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373134328358209 [2023-11-19 07:49:17,454 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2023-11-19 07:49:17,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2023-11-19 07:49:17,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:17,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2023-11-19 07:49:17,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states 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 07:49:17,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 07:49:17,462 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 07:49:17,463 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 114 flow. Second operand 3 states and 300 transitions. [2023-11-19 07:49:17,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 56 transitions, 224 flow [2023-11-19 07:49:17,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:49:17,466 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 143 flow [2023-11-19 07:49:17,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2023-11-19 07:49:17,468 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -8 predicate places. [2023-11-19 07:49:17,469 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 143 flow [2023-11-19 07:49:17,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 07:49:17,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:17,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:49:17,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:49:17,471 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-19 07:49:17,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:17,472 INFO L85 PathProgramCache]: Analyzing trace with hash 842596301, now seen corresponding path program 1 times [2023-11-19 07:49:17,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:17,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419603589] [2023-11-19 07:49:17,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:17,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:17,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:17,733 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 07:49:17,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:17,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419603589] [2023-11-19 07:49:17,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419603589] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:17,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:17,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:49:17,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453091048] [2023-11-19 07:49:17,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:17,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:49:17,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:17,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:49:17,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:49:17,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 268 [2023-11-19 07:49:17,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 07:49:17,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:17,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 268 [2023-11-19 07:49:17,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:18,174 INFO L124 PetriNetUnfolderBase]: 84/206 cut-off events. [2023-11-19 07:49:18,175 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-11-19 07:49:18,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 475 conditions, 206 events. 84/206 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1015 event pairs, 68 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 465. Up to 181 conditions per place. [2023-11-19 07:49:18,179 INFO L140 encePairwiseOnDemand]: 257/268 looper letters, 42 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-11-19 07:49:18,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 227 flow [2023-11-19 07:49:18,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-11-19 07:49:18,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3718905472636816 [2023-11-19 07:49:18,183 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-11-19 07:49:18,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-11-19 07:49:18,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:18,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-11-19 07:49:18,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:18,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 07:49:18,191 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 07:49:18,192 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 143 flow. Second operand 3 states and 299 transitions. [2023-11-19 07:49:18,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 227 flow [2023-11-19 07:49:18,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 50 transitions, 215 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:18,200 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 129 flow [2023-11-19 07:49:18,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2023-11-19 07:49:18,203 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -14 predicate places. [2023-11-19 07:49:18,203 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 129 flow [2023-11-19 07:49:18,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 07:49:18,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:18,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:49:18,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:49:18,213 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-19 07:49:18,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:18,215 INFO L85 PathProgramCache]: Analyzing trace with hash 842596302, now seen corresponding path program 1 times [2023-11-19 07:49:18,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:18,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475415895] [2023-11-19 07:49:18,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:18,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:18,490 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 07:49:18,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:18,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475415895] [2023-11-19 07:49:18,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475415895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:18,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:18,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:49:18,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162195481] [2023-11-19 07:49:18,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:18,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:49:18,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:18,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:49:18,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:49:18,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 268 [2023-11-19 07:49:18,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states 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 07:49:18,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:18,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 268 [2023-11-19 07:49:18,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:18,752 INFO L124 PetriNetUnfolderBase]: 76/186 cut-off events. [2023-11-19 07:49:18,753 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-19 07:49:18,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 186 events. 76/186 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 880 event pairs, 61 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 420. Up to 176 conditions per place. [2023-11-19 07:49:18,755 INFO L140 encePairwiseOnDemand]: 263/268 looper letters, 41 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-19 07:49:18,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 45 transitions, 205 flow [2023-11-19 07:49:18,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:18,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2023-11-19 07:49:18,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843283582089552 [2023-11-19 07:49:18,758 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2023-11-19 07:49:18,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2023-11-19 07:49:18,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:18,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2023-11-19 07:49:18,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states 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 07:49:18,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 07:49:18,765 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 07:49:18,765 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 129 flow. Second operand 3 states and 309 transitions. [2023-11-19 07:49:18,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 45 transitions, 205 flow [2023-11-19 07:49:18,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 195 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:18,768 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 113 flow [2023-11-19 07:49:18,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-11-19 07:49:18,770 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -18 predicate places. [2023-11-19 07:49:18,771 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 113 flow [2023-11-19 07:49:18,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states 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 07:49:18,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:18,772 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:49:18,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:49:18,772 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-19 07:49:18,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:18,773 INFO L85 PathProgramCache]: Analyzing trace with hash 350597472, now seen corresponding path program 1 times [2023-11-19 07:49:18,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:18,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077923881] [2023-11-19 07:49:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:18,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:49:18,805 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:49:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:49:18,852 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:49:18,853 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:49:18,855 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (79 of 80 remaining) [2023-11-19 07:49:18,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 80 remaining) [2023-11-19 07:49:18,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 80 remaining) [2023-11-19 07:49:18,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 80 remaining) [2023-11-19 07:49:18,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 80 remaining) [2023-11-19 07:49:18,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 80 remaining) [2023-11-19 07:49:18,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 80 remaining) [2023-11-19 07:49:18,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (72 of 80 remaining) [2023-11-19 07:49:18,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 80 remaining) [2023-11-19 07:49:18,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 80 remaining) [2023-11-19 07:49:18,865 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 80 remaining) [2023-11-19 07:49:18,865 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 80 remaining) [2023-11-19 07:49:18,865 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37ASSERT_VIOLATIONMEMORY_LEAK (67 of 80 remaining) [2023-11-19 07:49:18,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 80 remaining) [2023-11-19 07:49:18,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 80 remaining) [2023-11-19 07:49:18,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 80 remaining) [2023-11-19 07:49:18,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 80 remaining) [2023-11-19 07:49:18,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 80 remaining) [2023-11-19 07:49:18,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 80 remaining) [2023-11-19 07:49:18,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 80 remaining) [2023-11-19 07:49:18,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 80 remaining) [2023-11-19 07:49:18,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 80 remaining) [2023-11-19 07:49:18,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 80 remaining) [2023-11-19 07:49:18,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 80 remaining) [2023-11-19 07:49:18,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 80 remaining) [2023-11-19 07:49:18,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 80 remaining) [2023-11-19 07:49:18,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 80 remaining) [2023-11-19 07:49:18,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 80 remaining) [2023-11-19 07:49:18,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 80 remaining) [2023-11-19 07:49:18,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 80 remaining) [2023-11-19 07:49:18,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 80 remaining) [2023-11-19 07:49:18,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 80 remaining) [2023-11-19 07:49:18,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 80 remaining) [2023-11-19 07:49:18,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 80 remaining) [2023-11-19 07:49:18,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 80 remaining) [2023-11-19 07:49:18,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 80 remaining) [2023-11-19 07:49:18,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 80 remaining) [2023-11-19 07:49:18,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 80 remaining) [2023-11-19 07:49:18,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 80 remaining) [2023-11-19 07:49:18,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 80 remaining) [2023-11-19 07:49:18,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 80 remaining) [2023-11-19 07:49:18,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (38 of 80 remaining) [2023-11-19 07:49:18,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 80 remaining) [2023-11-19 07:49:18,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 80 remaining) [2023-11-19 07:49:18,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 80 remaining) [2023-11-19 07:49:18,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 80 remaining) [2023-11-19 07:49:18,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 80 remaining) [2023-11-19 07:49:18,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 80 remaining) [2023-11-19 07:49:18,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (31 of 80 remaining) [2023-11-19 07:49:18,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 80 remaining) [2023-11-19 07:49:18,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 80 remaining) [2023-11-19 07:49:18,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 80 remaining) [2023-11-19 07:49:18,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 80 remaining) [2023-11-19 07:49:18,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37ASSERT_VIOLATIONMEMORY_LEAK (26 of 80 remaining) [2023-11-19 07:49:18,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 80 remaining) [2023-11-19 07:49:18,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 80 remaining) [2023-11-19 07:49:18,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 80 remaining) [2023-11-19 07:49:18,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 80 remaining) [2023-11-19 07:49:18,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 80 remaining) [2023-11-19 07:49:18,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 80 remaining) [2023-11-19 07:49:18,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 80 remaining) [2023-11-19 07:49:18,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 80 remaining) [2023-11-19 07:49:18,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 80 remaining) [2023-11-19 07:49:18,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 80 remaining) [2023-11-19 07:49:18,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 80 remaining) [2023-11-19 07:49:18,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 80 remaining) [2023-11-19 07:49:18,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 80 remaining) [2023-11-19 07:49:18,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 80 remaining) [2023-11-19 07:49:18,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 80 remaining) [2023-11-19 07:49:18,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 80 remaining) [2023-11-19 07:49:18,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 80 remaining) [2023-11-19 07:49:18,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 80 remaining) [2023-11-19 07:49:18,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 80 remaining) [2023-11-19 07:49:18,892 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 80 remaining) [2023-11-19 07:49:18,892 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 80 remaining) [2023-11-19 07:49:18,892 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 80 remaining) [2023-11-19 07:49:18,892 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 80 remaining) [2023-11-19 07:49:18,893 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 80 remaining) [2023-11-19 07:49:18,893 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 80 remaining) [2023-11-19 07:49:18,893 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 80 remaining) [2023-11-19 07:49:18,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:49:18,894 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-19 07:49:18,897 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:49:18,897 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:49:19,120 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:49:19,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 258 transitions, 526 flow [2023-11-19 07:49:19,215 INFO L124 PetriNetUnfolderBase]: 37/292 cut-off events. [2023-11-19 07:49:19,215 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:49:19,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 292 events. 37/292 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1346 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 236. Up to 6 conditions per place. [2023-11-19 07:49:19,221 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 258 transitions, 526 flow [2023-11-19 07:49:19,231 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 258 transitions, 526 flow [2023-11-19 07:49:19,231 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:49:19,231 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 228 places, 258 transitions, 526 flow [2023-11-19 07:49:19,232 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 228 places, 258 transitions, 526 flow [2023-11-19 07:49:19,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 258 transitions, 526 flow [2023-11-19 07:49:19,309 INFO L124 PetriNetUnfolderBase]: 37/292 cut-off events. [2023-11-19 07:49:19,310 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:49:19,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 292 events. 37/292 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1346 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 236. Up to 6 conditions per place. [2023-11-19 07:49:19,341 INFO L119 LiptonReduction]: Number of co-enabled transitions 32264 [2023-11-19 07:49:35,312 INFO L134 LiptonReduction]: Checked pairs total: 85189 [2023-11-19 07:49:35,313 INFO L136 LiptonReduction]: Total number of compositions: 221 [2023-11-19 07:49:35,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:49:35,328 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;@6038cd82, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:49:35,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 118 error locations. [2023-11-19 07:49:35,331 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:49:35,331 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-19 07:49:35,331 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:49:35,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:35,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:49:35,332 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-19 07:49:35,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:35,332 INFO L85 PathProgramCache]: Analyzing trace with hash 47056, now seen corresponding path program 1 times [2023-11-19 07:49:35,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:35,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399898718] [2023-11-19 07:49:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:35,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:35,376 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 07:49:35,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:35,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399898718] [2023-11-19 07:49:35,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399898718] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:35,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:35,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:49:35,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400113881] [2023-11-19 07:49:35,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:35,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:35,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:35,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:35,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:35,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 479 [2023-11-19 07:49:35,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 131 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:35,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:35,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 479 [2023-11-19 07:49:35,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:38,715 INFO L124 PetriNetUnfolderBase]: 10881/17456 cut-off events. [2023-11-19 07:49:38,715 INFO L125 PetriNetUnfolderBase]: For 160/160 co-relation queries the response was YES. [2023-11-19 07:49:38,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34418 conditions, 17456 events. 10881/17456 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 2574. Compared 152270 event pairs, 9546 based on Foata normal form. 0/5788 useless extension candidates. Maximal degree in co-relation 6188. Up to 16824 conditions per place. [2023-11-19 07:49:38,881 INFO L140 encePairwiseOnDemand]: 462/479 looper letters, 100 selfloop transitions, 1 changer transitions 0/112 dead transitions. [2023-11-19 07:49:38,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 112 transitions, 436 flow [2023-11-19 07:49:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:38,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:38,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-11-19 07:49:38,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38413361169102295 [2023-11-19 07:49:38,886 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-11-19 07:49:38,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-11-19 07:49:38,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:38,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-11-19 07:49:38,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states 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 07:49:38,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states 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 07:49:38,895 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states 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 07:49:38,896 INFO L175 Difference]: Start difference. First operand has 120 places, 131 transitions, 272 flow. Second operand 3 states and 552 transitions. [2023-11-19 07:49:38,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 112 transitions, 436 flow [2023-11-19 07:49:38,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 112 transitions, 436 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:49:38,906 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 236 flow [2023-11-19 07:49:38,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2023-11-19 07:49:38,914 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -11 predicate places. [2023-11-19 07:49:38,914 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 236 flow [2023-11-19 07:49:38,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:38,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:38,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:49:38,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:49:38,915 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-19 07:49:38,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:38,916 INFO L85 PathProgramCache]: Analyzing trace with hash 47054, now seen corresponding path program 1 times [2023-11-19 07:49:38,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:38,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214587982] [2023-11-19 07:49:38,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:38,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:38,952 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 07:49:38,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:38,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214587982] [2023-11-19 07:49:38,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214587982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:38,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:38,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:49:38,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737937363] [2023-11-19 07:49:38,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:38,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:38,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:38,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:38,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:39,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 479 [2023-11-19 07:49:39,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states 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 07:49:39,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:39,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 479 [2023-11-19 07:49:39,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:41,419 INFO L124 PetriNetUnfolderBase]: 6762/11439 cut-off events. [2023-11-19 07:49:41,419 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2023-11-19 07:49:41,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22525 conditions, 11439 events. 6762/11439 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 1622. Compared 98553 event pairs, 5588 based on Foata normal form. 0/4694 useless extension candidates. Maximal degree in co-relation 22517. Up to 9858 conditions per place. [2023-11-19 07:49:41,518 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 189 selfloop transitions, 10 changer transitions 0/210 dead transitions. [2023-11-19 07:49:41,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 210 transitions, 835 flow [2023-11-19 07:49:41,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:41,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:41,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-11-19 07:49:41,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4210160055671538 [2023-11-19 07:49:41,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-11-19 07:49:41,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-11-19 07:49:41,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:41,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-11-19 07:49:41,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:41,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states 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 07:49:41,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states 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 07:49:41,532 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 236 flow. Second operand 3 states and 605 transitions. [2023-11-19 07:49:41,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 210 transitions, 835 flow [2023-11-19 07:49:41,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 210 transitions, 834 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:49:41,542 INFO L231 Difference]: Finished difference. Result has 112 places, 121 transitions, 313 flow [2023-11-19 07:49:41,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=313, PETRI_PLACES=112, PETRI_TRANSITIONS=121} [2023-11-19 07:49:41,544 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -8 predicate places. [2023-11-19 07:49:41,544 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 121 transitions, 313 flow [2023-11-19 07:49:41,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states 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 07:49:41,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:41,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:49:41,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:49:41,546 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-19 07:49:41,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:41,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1403034752, now seen corresponding path program 1 times [2023-11-19 07:49:41,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:41,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112475031] [2023-11-19 07:49:41,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:41,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:41,701 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 07:49:41,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:41,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112475031] [2023-11-19 07:49:41,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112475031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:41,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:41,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:49:41,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488882578] [2023-11-19 07:49:41,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:41,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:49:41,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:41,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:49:41,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:49:41,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 479 [2023-11-19 07:49:41,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 121 transitions, 313 flow. Second operand has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 07:49:41,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:41,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 479 [2023-11-19 07:49:41,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:44,075 INFO L124 PetriNetUnfolderBase]: 5368/9359 cut-off events. [2023-11-19 07:49:44,076 INFO L125 PetriNetUnfolderBase]: For 3179/3186 co-relation queries the response was YES. [2023-11-19 07:49:44,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21570 conditions, 9359 events. 5368/9359 cut-off events. For 3179/3186 co-relation queries the response was YES. Maximal size of possible extension queue 1375. Compared 81731 event pairs, 4057 based on Foata normal form. 3/4241 useless extension candidates. Maximal degree in co-relation 21559. Up to 7146 conditions per place. [2023-11-19 07:49:44,148 INFO L140 encePairwiseOnDemand]: 418/479 looper letters, 222 selfloop transitions, 65 changer transitions 0/298 dead transitions. [2023-11-19 07:49:44,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 298 transitions, 1336 flow [2023-11-19 07:49:44,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:49:44,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:49:44,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 833 transitions. [2023-11-19 07:49:44,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43475991649269313 [2023-11-19 07:49:44,153 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 833 transitions. [2023-11-19 07:49:44,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 833 transitions. [2023-11-19 07:49:44,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:44,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 833 transitions. [2023-11-19 07:49:44,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 208.25) internal successors, (833), 4 states have internal predecessors, (833), 0 states have call successors, (0), 0 states 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 07:49:44,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states 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 07:49:44,162 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states 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 07:49:44,162 INFO L175 Difference]: Start difference. First operand has 112 places, 121 transitions, 313 flow. Second operand 4 states and 833 transitions. [2023-11-19 07:49:44,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 298 transitions, 1336 flow [2023-11-19 07:49:44,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 298 transitions, 1282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:44,195 INFO L231 Difference]: Finished difference. Result has 116 places, 185 transitions, 889 flow [2023-11-19 07:49:44,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=889, PETRI_PLACES=116, PETRI_TRANSITIONS=185} [2023-11-19 07:49:44,196 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -4 predicate places. [2023-11-19 07:49:44,196 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 185 transitions, 889 flow [2023-11-19 07:49:44,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 07:49:44,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:44,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:49:44,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:49:44,197 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-19 07:49:44,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:44,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1403034753, now seen corresponding path program 1 times [2023-11-19 07:49:44,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:44,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320046488] [2023-11-19 07:49:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:44,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:44,366 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 07:49:44,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:44,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320046488] [2023-11-19 07:49:44,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320046488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:44,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:44,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:49:44,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192373114] [2023-11-19 07:49:44,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:44,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:49:44,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:44,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:49:44,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:49:44,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 479 [2023-11-19 07:49:44,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 185 transitions, 889 flow. Second operand has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states 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 07:49:44,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:44,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 479 [2023-11-19 07:49:44,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:45,649 INFO L124 PetriNetUnfolderBase]: 3956/6935 cut-off events. [2023-11-19 07:49:45,649 INFO L125 PetriNetUnfolderBase]: For 3159/3159 co-relation queries the response was YES. [2023-11-19 07:49:45,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19681 conditions, 6935 events. 3956/6935 cut-off events. For 3159/3159 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 58021 event pairs, 3055 based on Foata normal form. 574/4176 useless extension candidates. Maximal degree in co-relation 19667. Up to 6521 conditions per place. [2023-11-19 07:49:45,711 INFO L140 encePairwiseOnDemand]: 466/479 looper letters, 161 selfloop transitions, 1 changer transitions 0/173 dead transitions. [2023-11-19 07:49:45,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 173 transitions, 1189 flow [2023-11-19 07:49:45,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 536 transitions. [2023-11-19 07:49:45,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3729993041057759 [2023-11-19 07:49:45,719 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 536 transitions. [2023-11-19 07:49:45,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 536 transitions. [2023-11-19 07:49:45,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:45,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 536 transitions. [2023-11-19 07:49:45,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states 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 07:49:45,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states 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 07:49:45,726 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states 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 07:49:45,726 INFO L175 Difference]: Start difference. First operand has 116 places, 185 transitions, 889 flow. Second operand 3 states and 536 transitions. [2023-11-19 07:49:45,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 173 transitions, 1189 flow [2023-11-19 07:49:45,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 173 transitions, 1189 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:49:45,754 INFO L231 Difference]: Finished difference. Result has 106 places, 173 transitions, 867 flow [2023-11-19 07:49:45,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=867, PETRI_PLACES=106, PETRI_TRANSITIONS=173} [2023-11-19 07:49:45,755 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -14 predicate places. [2023-11-19 07:49:45,755 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 173 transitions, 867 flow [2023-11-19 07:49:45,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states 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 07:49:45,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:45,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:49:45,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:49:45,757 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-19 07:49:45,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:45,757 INFO L85 PathProgramCache]: Analyzing trace with hash 544410025, now seen corresponding path program 1 times [2023-11-19 07:49:45,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:45,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129975783] [2023-11-19 07:49:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:45,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:45,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:45,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129975783] [2023-11-19 07:49:45,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129975783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:45,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:45,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:49:45,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304335727] [2023-11-19 07:49:45,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:45,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:45,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:45,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:45,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:45,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 479 [2023-11-19 07:49:45,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 173 transitions, 867 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 07:49:45,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:45,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 479 [2023-11-19 07:49:45,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:47,411 INFO L124 PetriNetUnfolderBase]: 3784/6591 cut-off events. [2023-11-19 07:49:47,411 INFO L125 PetriNetUnfolderBase]: For 3053/3053 co-relation queries the response was YES. [2023-11-19 07:49:47,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18871 conditions, 6591 events. 3784/6591 cut-off events. For 3053/3053 co-relation queries the response was YES. Maximal size of possible extension queue 969. Compared 56751 event pairs, 1630 based on Foata normal form. 0/3509 useless extension candidates. Maximal degree in co-relation 18855. Up to 3973 conditions per place. [2023-11-19 07:49:47,470 INFO L140 encePairwiseOnDemand]: 466/479 looper letters, 205 selfloop transitions, 17 changer transitions 0/232 dead transitions. [2023-11-19 07:49:47,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 232 transitions, 1554 flow [2023-11-19 07:49:47,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:47,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 551 transitions. [2023-11-19 07:49:47,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38343771746694505 [2023-11-19 07:49:47,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 551 transitions. [2023-11-19 07:49:47,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 551 transitions. [2023-11-19 07:49:47,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:47,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 551 transitions. [2023-11-19 07:49:47,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:47,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states 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 07:49:47,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states 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 07:49:47,482 INFO L175 Difference]: Start difference. First operand has 106 places, 173 transitions, 867 flow. Second operand 3 states and 551 transitions. [2023-11-19 07:49:47,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 232 transitions, 1554 flow [2023-11-19 07:49:47,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 232 transitions, 1553 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:49:47,502 INFO L231 Difference]: Finished difference. Result has 109 places, 184 transitions, 1030 flow [2023-11-19 07:49:47,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1030, PETRI_PLACES=109, PETRI_TRANSITIONS=184} [2023-11-19 07:49:47,504 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -11 predicate places. [2023-11-19 07:49:47,504 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 184 transitions, 1030 flow [2023-11-19 07:49:47,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 07:49:47,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:47,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:49:47,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:49:47,505 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-19 07:49:47,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:47,506 INFO L85 PathProgramCache]: Analyzing trace with hash 544410016, now seen corresponding path program 1 times [2023-11-19 07:49:47,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:47,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856901907] [2023-11-19 07:49:47,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:47,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:47,651 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 07:49:47,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:47,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856901907] [2023-11-19 07:49:47,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856901907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:47,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:47,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:49:47,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441547867] [2023-11-19 07:49:47,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:47,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:49:47,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:47,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:49:47,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:49:47,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 479 [2023-11-19 07:49:47,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 184 transitions, 1030 flow. Second operand has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 07:49:47,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:47,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 479 [2023-11-19 07:49:47,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:49,317 INFO L124 PetriNetUnfolderBase]: 3394/6006 cut-off events. [2023-11-19 07:49:49,317 INFO L125 PetriNetUnfolderBase]: For 5094/5100 co-relation queries the response was YES. [2023-11-19 07:49:49,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18103 conditions, 6006 events. 3394/6006 cut-off events. For 5094/5100 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 49835 event pairs, 2467 based on Foata normal form. 2/3407 useless extension candidates. Maximal degree in co-relation 18086. Up to 4140 conditions per place. [2023-11-19 07:49:49,369 INFO L140 encePairwiseOnDemand]: 466/479 looper letters, 220 selfloop transitions, 13 changer transitions 0/244 dead transitions. [2023-11-19 07:49:49,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 244 transitions, 1705 flow [2023-11-19 07:49:49,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:49,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:49,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 569 transitions. [2023-11-19 07:49:49,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3959638135003479 [2023-11-19 07:49:49,373 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 569 transitions. [2023-11-19 07:49:49,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 569 transitions. [2023-11-19 07:49:49,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:49,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 569 transitions. [2023-11-19 07:49:49,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states 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 07:49:49,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states 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 07:49:49,381 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states 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 07:49:49,381 INFO L175 Difference]: Start difference. First operand has 109 places, 184 transitions, 1030 flow. Second operand 3 states and 569 transitions. [2023-11-19 07:49:49,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 244 transitions, 1705 flow [2023-11-19 07:49:49,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 244 transitions, 1669 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:49,405 INFO L231 Difference]: Finished difference. Result has 110 places, 184 transitions, 1043 flow [2023-11-19 07:49:49,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1043, PETRI_PLACES=110, PETRI_TRANSITIONS=184} [2023-11-19 07:49:49,406 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -10 predicate places. [2023-11-19 07:49:49,406 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 184 transitions, 1043 flow [2023-11-19 07:49:49,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 07:49:49,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:49,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:49:49,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:49:49,407 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-19 07:49:49,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:49,407 INFO L85 PathProgramCache]: Analyzing trace with hash 544410021, now seen corresponding path program 1 times [2023-11-19 07:49:49,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:49,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329287215] [2023-11-19 07:49:49,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:49,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:49,503 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 07:49:49,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:49,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329287215] [2023-11-19 07:49:49,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329287215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:49,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:49,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:49:49,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374184769] [2023-11-19 07:49:49,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:49,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:49,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:49,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:49,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:49,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 479 [2023-11-19 07:49:49,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 184 transitions, 1043 flow. Second operand has 3 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 07:49:49,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:49,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 479 [2023-11-19 07:49:49,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:50,570 INFO L124 PetriNetUnfolderBase]: 3184/5520 cut-off events. [2023-11-19 07:49:50,570 INFO L125 PetriNetUnfolderBase]: For 5174/5176 co-relation queries the response was YES. [2023-11-19 07:49:50,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17497 conditions, 5520 events. 3184/5520 cut-off events. For 5174/5176 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 45742 event pairs, 1477 based on Foata normal form. 68/3297 useless extension candidates. Maximal degree in co-relation 17478. Up to 3392 conditions per place. [2023-11-19 07:49:50,624 INFO L140 encePairwiseOnDemand]: 473/479 looper letters, 188 selfloop transitions, 15 changer transitions 0/213 dead transitions. [2023-11-19 07:49:50,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 213 transitions, 1544 flow [2023-11-19 07:49:50,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-11-19 07:49:50,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38900487125956856 [2023-11-19 07:49:50,630 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-11-19 07:49:50,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-11-19 07:49:50,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:50,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-11-19 07:49:50,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states 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 07:49:50,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states 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 07:49:50,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states 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 07:49:50,640 INFO L175 Difference]: Start difference. First operand has 110 places, 184 transitions, 1043 flow. Second operand 3 states and 559 transitions. [2023-11-19 07:49:50,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 213 transitions, 1544 flow [2023-11-19 07:49:50,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 213 transitions, 1518 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:50,673 INFO L231 Difference]: Finished difference. Result has 107 places, 179 transitions, 1025 flow [2023-11-19 07:49:50,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1025, PETRI_PLACES=107, PETRI_TRANSITIONS=179} [2023-11-19 07:49:50,675 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -13 predicate places. [2023-11-19 07:49:50,675 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 179 transitions, 1025 flow [2023-11-19 07:49:50,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 07:49:50,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:50,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:49:50,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:49:50,676 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-19 07:49:50,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:50,677 INFO L85 PathProgramCache]: Analyzing trace with hash 544410017, now seen corresponding path program 1 times [2023-11-19 07:49:50,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:50,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69309111] [2023-11-19 07:49:50,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:50,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:50,872 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 07:49:50,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:50,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69309111] [2023-11-19 07:49:50,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69309111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:50,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:50,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:49:50,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239275237] [2023-11-19 07:49:50,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:50,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:49:50,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:50,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:49:50,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:49:50,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 479 [2023-11-19 07:49:50,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 179 transitions, 1025 flow. Second operand has 4 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 07:49:50,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:50,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 479 [2023-11-19 07:49:50,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:52,187 INFO L124 PetriNetUnfolderBase]: 3010/5401 cut-off events. [2023-11-19 07:49:52,188 INFO L125 PetriNetUnfolderBase]: For 4005/4007 co-relation queries the response was YES. [2023-11-19 07:49:52,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16813 conditions, 5401 events. 3010/5401 cut-off events. For 4005/4007 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 44216 event pairs, 995 based on Foata normal form. 0/3052 useless extension candidates. Maximal degree in co-relation 16795. Up to 4413 conditions per place. [2023-11-19 07:49:52,238 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 217 selfloop transitions, 13 changer transitions 0/240 dead transitions. [2023-11-19 07:49:52,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 240 transitions, 1837 flow [2023-11-19 07:49:52,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:52,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2023-11-19 07:49:52,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3848295059151009 [2023-11-19 07:49:52,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2023-11-19 07:49:52,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2023-11-19 07:49:52,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:52,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2023-11-19 07:49:52,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:52,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states 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 07:49:52,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states 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 07:49:52,254 INFO L175 Difference]: Start difference. First operand has 107 places, 179 transitions, 1025 flow. Second operand 3 states and 553 transitions. [2023-11-19 07:49:52,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 240 transitions, 1837 flow [2023-11-19 07:49:52,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 240 transitions, 1789 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:52,297 INFO L231 Difference]: Finished difference. Result has 108 places, 190 transitions, 1121 flow [2023-11-19 07:49:52,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1121, PETRI_PLACES=108, PETRI_TRANSITIONS=190} [2023-11-19 07:49:52,298 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -12 predicate places. [2023-11-19 07:49:52,298 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 190 transitions, 1121 flow [2023-11-19 07:49:52,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 07:49:52,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:52,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:49:52,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:49:52,300 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-19 07:49:52,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:52,301 INFO L85 PathProgramCache]: Analyzing trace with hash 544407661, now seen corresponding path program 1 times [2023-11-19 07:49:52,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:52,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799006174] [2023-11-19 07:49:52,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:52,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:52,393 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 07:49:52,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:52,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799006174] [2023-11-19 07:49:52,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799006174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:52,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:52,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:49:52,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739528654] [2023-11-19 07:49:52,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:52,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:52,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:52,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:52,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:52,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 479 [2023-11-19 07:49:52,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 190 transitions, 1121 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 07:49:52,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:52,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 479 [2023-11-19 07:49:52,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand