./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.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_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/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_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/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_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/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 b29c7049a333b10d890b8afae901738020ed1f084c2a7d471b316f0abdba3430 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:03:12,963 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:03:13,088 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 08:03:13,098 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:03:13,099 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:03:13,139 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:03:13,141 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:03:13,142 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:03:13,143 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:03:13,148 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:03:13,150 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:03:13,150 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:03:13,151 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:03:13,153 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:03:13,153 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:03:13,154 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:03:13,154 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:03:13,155 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:03:13,155 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 08:03:13,156 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 08:03:13,156 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 08:03:13,157 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:03:13,158 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 08:03:13,158 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:03:13,159 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:03:13,159 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:03:13,160 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:03:13,161 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:03:13,161 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:03:13,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:13,163 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:03:13,164 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:03:13,164 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:03:13,164 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:03:13,165 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:03:13,165 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:03:13,181 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:03:13,182 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:03:13,182 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_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b29c7049a333b10d890b8afae901738020ed1f084c2a7d471b316f0abdba3430 [2023-11-19 08:03:13,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:03:13,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:03:13,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:03:13,595 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:03:13,596 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:03:13,597 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i [2023-11-19 08:03:16,667 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:03:17,040 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:03:17,043 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i [2023-11-19 08:03:17,072 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/data/d0957c953/288e5b24a1ae47a1af7bd8fe5ffd7fdd/FLAG650710386 [2023-11-19 08:03:17,092 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/data/d0957c953/288e5b24a1ae47a1af7bd8fe5ffd7fdd [2023-11-19 08:03:17,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:03:17,098 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:03:17,102 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:17,102 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:03:17,108 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:03:17,109 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:17" (1/1) ... [2023-11-19 08:03:17,110 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f5eb094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:17, skipping insertion in model container [2023-11-19 08:03:17,110 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:17" (1/1) ... [2023-11-19 08:03:17,189 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:03:17,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:17,853 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:03:17,907 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:18,017 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:03:18,017 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:18 WrapperNode [2023-11-19 08:03:18,017 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:18,019 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:18,019 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:03:18,019 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:03:18,027 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:18" (1/1) ... [2023-11-19 08:03:18,049 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:18" (1/1) ... [2023-11-19 08:03:18,080 INFO L138 Inliner]: procedures = 368, calls = 28, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 119 [2023-11-19 08:03:18,081 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:18,082 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:03:18,082 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:03:18,082 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:03:18,091 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:18" (1/1) ... [2023-11-19 08:03:18,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:18" (1/1) ... [2023-11-19 08:03:18,101 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:18" (1/1) ... [2023-11-19 08:03:18,111 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:18" (1/1) ... [2023-11-19 08:03:18,123 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:18" (1/1) ... [2023-11-19 08:03:18,138 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:18" (1/1) ... [2023-11-19 08:03:18,141 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:18" (1/1) ... [2023-11-19 08:03:18,153 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:18" (1/1) ... [2023-11-19 08:03:18,158 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:03:18,159 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:03:18,159 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:03:18,159 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:03:18,182 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:18" (1/1) ... [2023-11-19 08:03:18,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:18,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:18,235 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:03:18,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:03:18,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:03:18,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 08:03:18,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:03:18,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:03:18,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:03:18,311 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 08:03:18,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 08:03:18,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:03:18,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 08:03:18,312 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 08:03:18,312 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 08:03:18,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:03:18,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:03:18,315 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:03:18,505 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:03:18,508 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:03:18,989 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:03:19,002 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:03:19,002 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 08:03:19,007 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:19 BoogieIcfgContainer [2023-11-19 08:03:19,008 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:03:19,010 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:03:19,010 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:03:19,014 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:03:19,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:03:17" (1/3) ... [2023-11-19 08:03:19,015 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57de908e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:19, skipping insertion in model container [2023-11-19 08:03:19,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:18" (2/3) ... [2023-11-19 08:03:19,016 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57de908e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:19, skipping insertion in model container [2023-11-19 08:03:19,016 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:19" (3/3) ... [2023-11-19 08:03:19,018 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_17-arrayloop_nr.i [2023-11-19 08:03:19,039 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:03:19,039 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-19 08:03:19,039 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:03:19,154 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:03:19,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 177 transitions, 358 flow [2023-11-19 08:03:19,314 INFO L124 PetriNetUnfolderBase]: 6/176 cut-off events. [2023-11-19 08:03:19,316 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:03:19,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 176 events. 6/176 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 432 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2023-11-19 08:03:19,324 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 177 transitions, 358 flow [2023-11-19 08:03:19,334 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 176 transitions, 355 flow [2023-11-19 08:03:19,342 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:03:19,353 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 176 transitions, 355 flow [2023-11-19 08:03:19,356 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 176 transitions, 355 flow [2023-11-19 08:03:19,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 176 transitions, 355 flow [2023-11-19 08:03:19,409 INFO L124 PetriNetUnfolderBase]: 6/176 cut-off events. [2023-11-19 08:03:19,410 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:03:19,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 176 events. 6/176 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 430 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2023-11-19 08:03:19,419 INFO L119 LiptonReduction]: Number of co-enabled transitions 7844 [2023-11-19 08:03:27,849 INFO L134 LiptonReduction]: Checked pairs total: 24193 [2023-11-19 08:03:27,850 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-11-19 08:03:27,867 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:03:27,875 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;@1c26be7e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:03:27,875 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-19 08:03:27,878 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:03:27,879 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-19 08:03:27,879 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:03:27,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:27,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:03:27,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 08:03:27,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:27,886 INFO L85 PathProgramCache]: Analyzing trace with hash 19722, now seen corresponding path program 1 times [2023-11-19 08:03:27,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:27,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614997552] [2023-11-19 08:03:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:27,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:28,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:28,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614997552] [2023-11-19 08:03:28,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614997552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:28,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:28,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:03:28,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973174539] [2023-11-19 08:03:28,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:28,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:28,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:28,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:28,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:28,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 331 [2023-11-19 08:03:28,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:28,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:28,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 331 [2023-11-19 08:03:28,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:29,077 INFO L124 PetriNetUnfolderBase]: 895/2147 cut-off events. [2023-11-19 08:03:29,077 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:03:29,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3949 conditions, 2147 events. 895/2147 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 13685 event pairs, 450 based on Foata normal form. 0/1105 useless extension candidates. Maximal degree in co-relation 3922. Up to 997 conditions per place. [2023-11-19 08:03:29,104 INFO L140 encePairwiseOnDemand]: 319/331 looper letters, 92 selfloop transitions, 4 changer transitions 0/109 dead transitions. [2023-11-19 08:03:29,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 109 transitions, 413 flow [2023-11-19 08:03:29,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:29,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 600 transitions. [2023-11-19 08:03:29,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6042296072507553 [2023-11-19 08:03:29,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 600 transitions. [2023-11-19 08:03:29,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 600 transitions. [2023-11-19 08:03:29,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:29,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 600 transitions. [2023-11-19 08:03:29,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:29,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:29,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:29,158 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 143 flow. Second operand 3 states and 600 transitions. [2023-11-19 08:03:29,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 109 transitions, 413 flow [2023-11-19 08:03:29,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 109 transitions, 412 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:29,169 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 162 flow [2023-11-19 08:03:29,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2023-11-19 08:03:29,177 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-11-19 08:03:29,177 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 162 flow [2023-11-19 08:03:29,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:29,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:29,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:03:29,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:03:29,180 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 08:03:29,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:29,181 INFO L85 PathProgramCache]: Analyzing trace with hash 19751, now seen corresponding path program 1 times [2023-11-19 08:03:29,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:29,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087096911] [2023-11-19 08:03:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:29,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:29,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:29,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087096911] [2023-11-19 08:03:29,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087096911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:29,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:29,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:03:29,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306702034] [2023-11-19 08:03:29,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:29,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:29,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:29,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:29,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:29,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 331 [2023-11-19 08:03:29,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:29,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:29,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 331 [2023-11-19 08:03:29,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:30,272 INFO L124 PetriNetUnfolderBase]: 895/2150 cut-off events. [2023-11-19 08:03:30,272 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2023-11-19 08:03:30,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 2150 events. 895/2150 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 13699 event pairs, 828 based on Foata normal form. 0/1128 useless extension candidates. Maximal degree in co-relation 4021. Up to 1795 conditions per place. [2023-11-19 08:03:30,292 INFO L140 encePairwiseOnDemand]: 328/331 looper letters, 54 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-11-19 08:03:30,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 276 flow [2023-11-19 08:03:30,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:30,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:30,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-11-19 08:03:30,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367573011077543 [2023-11-19 08:03:30,297 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-11-19 08:03:30,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-11-19 08:03:30,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:30,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-11-19 08:03:30,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:30,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:30,306 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:30,306 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 162 flow. Second operand 3 states and 533 transitions. [2023-11-19 08:03:30,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 276 flow [2023-11-19 08:03:30,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:30,310 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 166 flow [2023-11-19 08:03:30,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2023-11-19 08:03:30,312 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 0 predicate places. [2023-11-19 08:03:30,312 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 166 flow [2023-11-19 08:03:30,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:30,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:30,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:03:30,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:03:30,314 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 08:03:30,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:30,315 INFO L85 PathProgramCache]: Analyzing trace with hash 19752, now seen corresponding path program 1 times [2023-11-19 08:03:30,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:30,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458260095] [2023-11-19 08:03:30,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:30,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:30,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:30,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458260095] [2023-11-19 08:03:30,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458260095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:30,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:30,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:03:30,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911386914] [2023-11-19 08:03:30,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:30,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:30,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:30,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:30,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:30,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 331 [2023-11-19 08:03:30,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:30,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:30,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 331 [2023-11-19 08:03:30,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:30,949 INFO L124 PetriNetUnfolderBase]: 779/1899 cut-off events. [2023-11-19 08:03:30,949 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-11-19 08:03:30,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3551 conditions, 1899 events. 779/1899 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 11870 event pairs, 649 based on Foata normal form. 2/1057 useless extension candidates. Maximal degree in co-relation 3537. Up to 1412 conditions per place. [2023-11-19 08:03:30,968 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 68 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-11-19 08:03:30,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 336 flow [2023-11-19 08:03:30,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:30,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 576 transitions. [2023-11-19 08:03:30,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5800604229607251 [2023-11-19 08:03:30,972 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 576 transitions. [2023-11-19 08:03:30,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 576 transitions. [2023-11-19 08:03:30,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:30,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 576 transitions. [2023-11-19 08:03:30,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:30,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:30,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:30,981 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 166 flow. Second operand 3 states and 576 transitions. [2023-11-19 08:03:30,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 336 flow [2023-11-19 08:03:30,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 83 transitions, 332 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:30,986 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 164 flow [2023-11-19 08:03:30,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2023-11-19 08:03:30,989 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2023-11-19 08:03:30,989 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 164 flow [2023-11-19 08:03:30,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:30,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:30,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 08:03:30,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:03:30,991 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 08:03:30,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:30,992 INFO L85 PathProgramCache]: Analyzing trace with hash 612843, now seen corresponding path program 1 times [2023-11-19 08:03:30,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:30,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693395112] [2023-11-19 08:03:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:30,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:31,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:31,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693395112] [2023-11-19 08:03:31,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693395112] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:31,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454842154] [2023-11-19 08:03:31,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:31,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:31,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:31,394 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:31,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:03:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:31,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 08:03:31,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:31,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:03:31,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 08:03:31,655 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-19 08:03:31,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-19 08:03:31,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:03:31,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 08:03:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:31,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:31,873 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:03:31,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2023-11-19 08:03:31,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:32,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454842154] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:32,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:03:32,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 08:03:32,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712644199] [2023-11-19 08:03:32,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:32,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:03:32,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:32,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:03:32,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:03:34,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 331 [2023-11-19 08:03:34,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 164 flow. Second operand has 8 states, 8 states have (on average 147.125) internal successors, (1177), 8 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:34,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:34,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 331 [2023-11-19 08:03:34,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:35,599 INFO L124 PetriNetUnfolderBase]: 817/1990 cut-off events. [2023-11-19 08:03:35,600 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-11-19 08:03:35,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3814 conditions, 1990 events. 817/1990 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 12797 event pairs, 37 based on Foata normal form. 3/1127 useless extension candidates. Maximal degree in co-relation 3797. Up to 807 conditions per place. [2023-11-19 08:03:35,616 INFO L140 encePairwiseOnDemand]: 321/331 looper letters, 90 selfloop transitions, 11 changer transitions 0/114 dead transitions. [2023-11-19 08:03:35,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 114 transitions, 490 flow [2023-11-19 08:03:35,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:03:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:03:35,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 982 transitions. [2023-11-19 08:03:35,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4944612286002014 [2023-11-19 08:03:35,621 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 982 transitions. [2023-11-19 08:03:35,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 982 transitions. [2023-11-19 08:03:35,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:35,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 982 transitions. [2023-11-19 08:03:35,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.66666666666666) internal successors, (982), 6 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:35,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 331.0) internal successors, (2317), 7 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:35,633 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 331.0) internal successors, (2317), 7 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:35,633 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 164 flow. Second operand 6 states and 982 transitions. [2023-11-19 08:03:35,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 114 transitions, 490 flow [2023-11-19 08:03:35,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 114 transitions, 486 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:03:35,641 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 231 flow [2023-11-19 08:03:35,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=231, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2023-11-19 08:03:35,643 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2023-11-19 08:03:35,644 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 231 flow [2023-11-19 08:03:35,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 147.125) internal successors, (1177), 8 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:35,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:35,649 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-11-19 08:03:35,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:35,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:35,863 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 08:03:35,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:35,863 INFO L85 PathProgramCache]: Analyzing trace with hash 18998666, now seen corresponding path program 1 times [2023-11-19 08:03:35,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:35,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76737403] [2023-11-19 08:03:35,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:35,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:35,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:35,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76737403] [2023-11-19 08:03:35,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76737403] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:35,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033215382] [2023-11-19 08:03:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:35,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:35,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:35,947 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:35,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:03:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:36,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:03:36,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:36,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:36,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033215382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:36,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:03:36,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 08:03:36,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974607459] [2023-11-19 08:03:36,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:36,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:03:36,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:36,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:03:36,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:03:36,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 331 [2023-11-19 08:03:36,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 231 flow. Second operand has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:36,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:36,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 331 [2023-11-19 08:03:36,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:37,649 INFO L124 PetriNetUnfolderBase]: 2166/5322 cut-off events. [2023-11-19 08:03:37,649 INFO L125 PetriNetUnfolderBase]: For 627/627 co-relation queries the response was YES. [2023-11-19 08:03:37,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10437 conditions, 5322 events. 2166/5322 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 33028 event pairs, 88 based on Foata normal form. 94/3243 useless extension candidates. Maximal degree in co-relation 10401. Up to 705 conditions per place. [2023-11-19 08:03:37,693 INFO L140 encePairwiseOnDemand]: 321/331 looper letters, 246 selfloop transitions, 16 changer transitions 0/275 dead transitions. [2023-11-19 08:03:37,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 275 transitions, 1234 flow [2023-11-19 08:03:37,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:03:37,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 08:03:37,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1575 transitions. [2023-11-19 08:03:37,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5947885196374623 [2023-11-19 08:03:37,700 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1575 transitions. [2023-11-19 08:03:37,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1575 transitions. [2023-11-19 08:03:37,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:37,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1575 transitions. [2023-11-19 08:03:37,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 196.875) internal successors, (1575), 8 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:37,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 331.0) internal successors, (2979), 9 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:37,717 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 331.0) internal successors, (2979), 9 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:37,717 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 231 flow. Second operand 8 states and 1575 transitions. [2023-11-19 08:03:37,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 275 transitions, 1234 flow [2023-11-19 08:03:37,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 275 transitions, 1226 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:37,733 INFO L231 Difference]: Finished difference. Result has 88 places, 76 transitions, 361 flow [2023-11-19 08:03:37,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=361, PETRI_PLACES=88, PETRI_TRANSITIONS=76} [2023-11-19 08:03:37,734 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 17 predicate places. [2023-11-19 08:03:37,735 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 76 transitions, 361 flow [2023-11-19 08:03:37,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:37,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:37,736 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-19 08:03:37,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:37,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:37,958 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 08:03:37,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:37,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1077894695, now seen corresponding path program 2 times [2023-11-19 08:03:37,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:37,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058374102] [2023-11-19 08:03:37,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:37,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:38,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:38,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058374102] [2023-11-19 08:03:38,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058374102] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:38,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889721974] [2023-11-19 08:03:38,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:03:38,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:38,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:38,851 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:38,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcaa67e-c2ed-4cee-b9e6-52038b5143b2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:03:39,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:03:39,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:03:39,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-19 08:03:39,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:39,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:03:39,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 08:03:39,145 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-19 08:03:39,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-19 08:03:39,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:03:39,284 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-19 08:03:39,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 26 [2023-11-19 08:03:39,301 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 08:03:39,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 08:03:39,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:03:39,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 13 [2023-11-19 08:03:39,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:03:39,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 13 [2023-11-19 08:03:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:39,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:39,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:03:39,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2023-11-19 08:03:40,009 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:03:40,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 102 [2023-11-19 08:03:40,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:03:40,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 117 [2023-11-19 08:03:43,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:03:43,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 132 [2023-11-19 08:03:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:44,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889721974] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:44,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:03:44,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-19 08:03:44,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219988030] [2023-11-19 08:03:44,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:44,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 08:03:44,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:44,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 08:03:44,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=206, Unknown=1, NotChecked=0, Total=272 [2023-11-19 08:03:46,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 08:03:48,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 08:03:51,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 08:03:53,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 08:03:55,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 08:03:57,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 08:04:00,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 08:04:04,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 08:04:06,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 08:04:07,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]