./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 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_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx --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 c4f9d381010c40c0aeec814019363f065d1b11569cf33ee927950bcd4ef29f20 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:21:04,636 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:21:04,756 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:21:04,762 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:21:04,763 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:21:04,801 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:21:04,803 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:21:04,804 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:21:04,805 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:21:04,810 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:21:04,811 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:21:04,811 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:21:04,812 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:21:04,814 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:21:04,814 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:21:04,815 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:21:04,815 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:21:04,816 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:21:04,816 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:21:04,817 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:21:04,817 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:21:04,818 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:21:04,818 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:21:04,819 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:21:04,819 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:21:04,820 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:21:04,821 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:21:04,821 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:21:04,822 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:21:04,822 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:21:04,823 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:21:04,824 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:21:04,824 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:21:04,824 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:21:04,825 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:21:04,825 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:21:04,825 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:21:04,825 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:21:04,826 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:21:04,826 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_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c4f9d381010c40c0aeec814019363f065d1b11569cf33ee927950bcd4ef29f20 [2023-11-21 22:21:05,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:21:05,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:21:05,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:21:05,136 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:21:05,136 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:21:05,137 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2023-11-21 22:21:08,350 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:21:08,768 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:21:08,769 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2023-11-21 22:21:08,796 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/data/4f6398004/65be8935c4e24b9b99feeff3b54bbec3/FLAGf1e3193a3 [2023-11-21 22:21:08,813 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/data/4f6398004/65be8935c4e24b9b99feeff3b54bbec3 [2023-11-21 22:21:08,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:21:08,821 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:21:08,824 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:21:08,824 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:21:08,830 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:21:08,831 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:21:08" (1/1) ... [2023-11-21 22:21:08,832 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@231f668a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:08, skipping insertion in model container [2023-11-21 22:21:08,832 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:21:08" (1/1) ... [2023-11-21 22:21:08,904 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:21:09,728 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:21:09,745 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:21:09,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:21:09,949 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:21:09,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:09 WrapperNode [2023-11-21 22:21:09,950 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:21:09,951 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:21:09,951 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:21:09,952 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:21:09,960 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:09" (1/1) ... [2023-11-21 22:21:09,999 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:09" (1/1) ... [2023-11-21 22:21:10,042 INFO L138 Inliner]: procedures = 371, calls = 32, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 133 [2023-11-21 22:21:10,042 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:21:10,043 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:21:10,043 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:21:10,043 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:21:10,053 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:09" (1/1) ... [2023-11-21 22:21:10,053 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:09" (1/1) ... [2023-11-21 22:21:10,059 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:09" (1/1) ... [2023-11-21 22:21:10,059 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:09" (1/1) ... [2023-11-21 22:21:10,072 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:09" (1/1) ... [2023-11-21 22:21:10,076 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:09" (1/1) ... [2023-11-21 22:21:10,078 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:09" (1/1) ... [2023-11-21 22:21:10,081 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:09" (1/1) ... [2023-11-21 22:21:10,085 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:21:10,086 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:21:10,086 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:21:10,087 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:21:10,088 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:09" (1/1) ... [2023-11-21 22:21:10,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:21:10,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:21:10,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:21:10,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:21:10,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:21:10,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 22:21:10,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:21:10,170 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-21 22:21:10,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:21:10,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:21:10,171 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-21 22:21:10,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:21:10,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:21:10,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 22:21:10,171 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-21 22:21:10,172 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-21 22:21:10,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:21:10,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:21:10,174 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 22:21:10,344 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:21:10,346 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:21:10,908 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:21:11,154 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:21:11,154 INFO L308 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-21 22:21:11,156 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:21:11 BoogieIcfgContainer [2023-11-21 22:21:11,156 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:21:11,161 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:21:11,161 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:21:11,164 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:21:11,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:21:08" (1/3) ... [2023-11-21 22:21:11,166 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655cf738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:21:11, skipping insertion in model container [2023-11-21 22:21:11,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:09" (2/3) ... [2023-11-21 22:21:11,168 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655cf738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:21:11, skipping insertion in model container [2023-11-21 22:21:11,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:21:11" (3/3) ... [2023-11-21 22:21:11,169 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_11-arraylist_nr.i [2023-11-21 22:21:11,189 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:21:11,190 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-21 22:21:11,191 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 22:21:11,334 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:21:11,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 76 transitions, 156 flow [2023-11-21 22:21:11,442 INFO L124 PetriNetUnfolderBase]: 2/75 cut-off events. [2023-11-21 22:21:11,442 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:21:11,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 75 events. 2/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 288 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2023-11-21 22:21:11,446 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 76 transitions, 156 flow [2023-11-21 22:21:11,451 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 75 transitions, 153 flow [2023-11-21 22:21:11,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:21:11,478 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;@12550b5e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:21:11,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-21 22:21:11,484 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:21:11,484 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2023-11-21 22:21:11,484 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:21:11,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:21:11,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-21 22:21:11,486 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:21:11,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:11,491 INFO L85 PathProgramCache]: Analyzing trace with hash 12824950, now seen corresponding path program 1 times [2023-11-21 22:21:11,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:11,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665772054] [2023-11-21 22:21:11,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:11,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:21:11,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:11,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665772054] [2023-11-21 22:21:11,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665772054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:21:11,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:21:11,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:21:11,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83085701] [2023-11-21 22:21:11,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:21:11,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:21:11,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:11,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:21:11,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:21:11,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 76 [2023-11-21 22:21:11,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:11,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:21:11,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 76 [2023-11-21 22:21:11,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:21:12,016 INFO L124 PetriNetUnfolderBase]: 65/271 cut-off events. [2023-11-21 22:21:12,016 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-21 22:21:12,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 271 events. 65/271 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1341 event pairs, 63 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 376. Up to 155 conditions per place. [2023-11-21 22:21:12,025 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 27 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-11-21 22:21:12,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 76 transitions, 213 flow [2023-11-21 22:21:12,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:21:12,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:21:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 174 transitions. [2023-11-21 22:21:12,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7631578947368421 [2023-11-21 22:21:12,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 174 transitions. [2023-11-21 22:21:12,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 174 transitions. [2023-11-21 22:21:12,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:21:12,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 174 transitions. [2023-11-21 22:21:12,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:12,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:12,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:12,064 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 153 flow. Second operand 3 states and 174 transitions. [2023-11-21 22:21:12,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 76 transitions, 213 flow [2023-11-21 22:21:12,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 76 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:21:12,078 INFO L231 Difference]: Finished difference. Result has 79 places, 76 transitions, 164 flow [2023-11-21 22:21:12,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=79, PETRI_TRANSITIONS=76} [2023-11-21 22:21:12,084 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 2 predicate places. [2023-11-21 22:21:12,084 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 76 transitions, 164 flow [2023-11-21 22:21:12,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:12,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:21:12,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:21:12,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:21:12,086 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:21:12,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:12,086 INFO L85 PathProgramCache]: Analyzing trace with hash 397486342, now seen corresponding path program 1 times [2023-11-21 22:21:12,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:12,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431009326] [2023-11-21 22:21:12,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:12,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:21:12,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:12,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431009326] [2023-11-21 22:21:12,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431009326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:12,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490578653] [2023-11-21 22:21:12,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:12,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:12,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:21:12,244 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:21:12,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:21:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:12,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:21:12,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:21:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:21:12,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:21:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:21:12,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490578653] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:21:12,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:21:12,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-21 22:21:12,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607377367] [2023-11-21 22:21:12,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:21:12,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:21:12,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:12,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:21:12,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:21:12,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 76 [2023-11-21 22:21:12,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 164 flow. Second operand has 7 states, 7 states have (on average 49.285714285714285) internal successors, (345), 7 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:12,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:21:12,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 76 [2023-11-21 22:21:12,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:21:12,626 INFO L124 PetriNetUnfolderBase]: 65/274 cut-off events. [2023-11-21 22:21:12,626 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:21:12,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 274 events. 65/274 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1345 event pairs, 63 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 435. Up to 155 conditions per place. [2023-11-21 22:21:12,632 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 27 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2023-11-21 22:21:12,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 79 transitions, 240 flow [2023-11-21 22:21:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:21:12,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 22:21:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 323 transitions. [2023-11-21 22:21:12,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2023-11-21 22:21:12,641 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 323 transitions. [2023-11-21 22:21:12,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 323 transitions. [2023-11-21 22:21:12,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:21:12,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 323 transitions. [2023-11-21 22:21:12,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 53.833333333333336) internal successors, (323), 6 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:12,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:12,650 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:12,653 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 164 flow. Second operand 6 states and 323 transitions. [2023-11-21 22:21:12,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 79 transitions, 240 flow [2023-11-21 22:21:12,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 79 transitions, 236 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-21 22:21:12,657 INFO L231 Difference]: Finished difference. Result has 86 places, 79 transitions, 196 flow [2023-11-21 22:21:12,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=86, PETRI_TRANSITIONS=79} [2023-11-21 22:21:12,659 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 9 predicate places. [2023-11-21 22:21:12,660 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 79 transitions, 196 flow [2023-11-21 22:21:12,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 49.285714285714285) internal successors, (345), 7 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:12,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:21:12,667 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-21 22:21:12,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 22:21:12,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:12,884 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:21:12,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:12,885 INFO L85 PathProgramCache]: Analyzing trace with hash 204281206, now seen corresponding path program 2 times [2023-11-21 22:21:12,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:12,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412026088] [2023-11-21 22:21:12,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:12,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 22:21:13,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:13,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412026088] [2023-11-21 22:21:13,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412026088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:21:13,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:21:13,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:21:13,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705500631] [2023-11-21 22:21:13,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:21:13,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:21:13,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:13,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:21:13,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:21:13,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 76 [2023-11-21 22:21:13,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 79 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:13,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:21:13,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 76 [2023-11-21 22:21:13,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:21:13,211 INFO L124 PetriNetUnfolderBase]: 65/270 cut-off events. [2023-11-21 22:21:13,212 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-21 22:21:13,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 270 events. 65/270 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1310 event pairs, 63 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 424. Up to 157 conditions per place. [2023-11-21 22:21:13,217 INFO L140 encePairwiseOnDemand]: 68/76 looper letters, 30 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-11-21 22:21:13,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 75 transitions, 256 flow [2023-11-21 22:21:13,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:21:13,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:21:13,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2023-11-21 22:21:13,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7017543859649122 [2023-11-21 22:21:13,219 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 160 transitions. [2023-11-21 22:21:13,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 160 transitions. [2023-11-21 22:21:13,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:21:13,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 160 transitions. [2023-11-21 22:21:13,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:13,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:13,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:13,222 INFO L175 Difference]: Start difference. First operand has 86 places, 79 transitions, 196 flow. Second operand 3 states and 160 transitions. [2023-11-21 22:21:13,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 75 transitions, 256 flow [2023-11-21 22:21:13,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 75 transitions, 242 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-21 22:21:13,228 INFO L231 Difference]: Finished difference. Result has 83 places, 75 transitions, 182 flow [2023-11-21 22:21:13,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=83, PETRI_TRANSITIONS=75} [2023-11-21 22:21:13,230 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 6 predicate places. [2023-11-21 22:21:13,230 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 75 transitions, 182 flow [2023-11-21 22:21:13,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:13,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:21:13,231 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-21 22:21:13,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:21:13,232 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:21:13,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:13,232 INFO L85 PathProgramCache]: Analyzing trace with hash 204281207, now seen corresponding path program 1 times [2023-11-21 22:21:13,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:13,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654467719] [2023-11-21 22:21:13,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:13,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:13,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:21:13,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:13,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654467719] [2023-11-21 22:21:13,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654467719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:13,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919535454] [2023-11-21 22:21:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:13,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:13,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:21:13,362 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:21:13,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:21:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:13,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 22:21:13,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:21:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:21:13,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:21:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:21:13,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919535454] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:21:13,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:21:13,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-21 22:21:13,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172872998] [2023-11-21 22:21:13,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:21:13,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 22:21:13,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:13,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 22:21:13,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:21:13,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 76 [2023-11-21 22:21:13,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 182 flow. Second operand has 13 states, 13 states have (on average 49.15384615384615) internal successors, (639), 13 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:13,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:21:13,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 76 [2023-11-21 22:21:13,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:21:13,747 INFO L124 PetriNetUnfolderBase]: 65/276 cut-off events. [2023-11-21 22:21:13,747 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-21 22:21:13,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 276 events. 65/276 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1314 event pairs, 63 based on Foata normal form. 6/222 useless extension candidates. Maximal degree in co-relation 434. Up to 155 conditions per place. [2023-11-21 22:21:13,750 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 27 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2023-11-21 22:21:13,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 81 transitions, 294 flow [2023-11-21 22:21:13,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:21:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-21 22:21:13,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 620 transitions. [2023-11-21 22:21:13,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6798245614035088 [2023-11-21 22:21:13,754 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 620 transitions. [2023-11-21 22:21:13,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 620 transitions. [2023-11-21 22:21:13,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:21:13,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 620 transitions. [2023-11-21 22:21:13,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 51.666666666666664) internal successors, (620), 12 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:13,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 76.0) internal successors, (988), 13 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:13,762 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 76.0) internal successors, (988), 13 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:13,763 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 182 flow. Second operand 12 states and 620 transitions. [2023-11-21 22:21:13,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 81 transitions, 294 flow [2023-11-21 22:21:13,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 81 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:21:13,769 INFO L231 Difference]: Finished difference. Result has 98 places, 81 transitions, 258 flow [2023-11-21 22:21:13,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=258, PETRI_PLACES=98, PETRI_TRANSITIONS=81} [2023-11-21 22:21:13,771 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 21 predicate places. [2023-11-21 22:21:13,772 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 81 transitions, 258 flow [2023-11-21 22:21:13,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 49.15384615384615) internal successors, (639), 13 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:13,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:21:13,777 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-11-21 22:21:13,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:21:13,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:13,992 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:21:13,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:13,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1126077577, now seen corresponding path program 2 times [2023-11-21 22:21:13,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:13,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979044375] [2023-11-21 22:21:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:13,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:14,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:14,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979044375] [2023-11-21 22:21:14,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979044375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:21:14,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:21:14,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:21:14,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120082590] [2023-11-21 22:21:14,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:21:14,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:21:14,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:14,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:21:14,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:21:14,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 76 [2023-11-21 22:21:14,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 81 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:14,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:21:14,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 76 [2023-11-21 22:21:14,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:21:14,384 INFO L124 PetriNetUnfolderBase]: 65/272 cut-off events. [2023-11-21 22:21:14,385 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-21 22:21:14,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 272 events. 65/272 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1294 event pairs, 63 based on Foata normal form. 2/215 useless extension candidates. Maximal degree in co-relation 424. Up to 163 conditions per place. [2023-11-21 22:21:14,389 INFO L140 encePairwiseOnDemand]: 68/76 looper letters, 34 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2023-11-21 22:21:14,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 77 transitions, 326 flow [2023-11-21 22:21:14,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:21:14,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:21:14,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2023-11-21 22:21:14,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7192982456140351 [2023-11-21 22:21:14,391 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 164 transitions. [2023-11-21 22:21:14,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 164 transitions. [2023-11-21 22:21:14,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:21:14,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 164 transitions. [2023-11-21 22:21:14,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:14,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:14,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:14,394 INFO L175 Difference]: Start difference. First operand has 98 places, 81 transitions, 258 flow. Second operand 3 states and 164 transitions. [2023-11-21 22:21:14,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 77 transitions, 326 flow [2023-11-21 22:21:14,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 77 transitions, 278 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-21 22:21:14,405 INFO L231 Difference]: Finished difference. Result has 91 places, 77 transitions, 210 flow [2023-11-21 22:21:14,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=91, PETRI_TRANSITIONS=77} [2023-11-21 22:21:14,408 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 14 predicate places. [2023-11-21 22:21:14,408 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 77 transitions, 210 flow [2023-11-21 22:21:14,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:14,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:21:14,409 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-11-21 22:21:14,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:21:14,409 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:21:14,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:14,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1126077575, now seen corresponding path program 1 times [2023-11-21 22:21:14,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:14,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589642852] [2023-11-21 22:21:14,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:14,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:14,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:14,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589642852] [2023-11-21 22:21:14,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589642852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:21:14,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:21:14,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:21:14,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600039876] [2023-11-21 22:21:14,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:21:14,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:21:14,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:14,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:21:14,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:21:14,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 76 [2023-11-21 22:21:14,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 77 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:14,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:21:14,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 76 [2023-11-21 22:21:14,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:21:14,651 INFO L124 PetriNetUnfolderBase]: 65/292 cut-off events. [2023-11-21 22:21:14,652 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-21 22:21:14,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 292 events. 65/292 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1324 event pairs, 63 based on Foata normal form. 1/229 useless extension candidates. Maximal degree in co-relation 459. Up to 165 conditions per place. [2023-11-21 22:21:14,655 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 43 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-11-21 22:21:14,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 84 transitions, 322 flow [2023-11-21 22:21:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:21:14,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:21:14,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2023-11-21 22:21:14,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7894736842105263 [2023-11-21 22:21:14,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 180 transitions. [2023-11-21 22:21:14,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 180 transitions. [2023-11-21 22:21:14,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:21:14,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 180 transitions. [2023-11-21 22:21:14,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:14,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:14,659 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:14,660 INFO L175 Difference]: Start difference. First operand has 91 places, 77 transitions, 210 flow. Second operand 3 states and 180 transitions. [2023-11-21 22:21:14,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 84 transitions, 322 flow [2023-11-21 22:21:14,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 84 transitions, 306 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:21:14,664 INFO L231 Difference]: Finished difference. Result has 92 places, 78 transitions, 214 flow [2023-11-21 22:21:14,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=92, PETRI_TRANSITIONS=78} [2023-11-21 22:21:14,666 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2023-11-21 22:21:14,666 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 78 transitions, 214 flow [2023-11-21 22:21:14,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:14,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:21:14,667 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-21 22:21:14,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:21:14,667 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:21:14,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:14,668 INFO L85 PathProgramCache]: Analyzing trace with hash 171217837, now seen corresponding path program 1 times [2023-11-21 22:21:14,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:14,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266149617] [2023-11-21 22:21:14,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:14,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:14,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:14,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266149617] [2023-11-21 22:21:14,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266149617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:21:14,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:21:14,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:21:14,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846880066] [2023-11-21 22:21:14,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:21:14,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:21:14,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:14,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:21:14,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:21:15,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 76 [2023-11-21 22:21:15,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 78 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:15,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:21:15,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 76 [2023-11-21 22:21:15,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:21:15,216 INFO L124 PetriNetUnfolderBase]: 78/344 cut-off events. [2023-11-21 22:21:15,216 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-11-21 22:21:15,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 344 events. 78/344 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1652 event pairs, 55 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 547. Up to 156 conditions per place. [2023-11-21 22:21:15,220 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 54 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2023-11-21 22:21:15,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 89 transitions, 350 flow [2023-11-21 22:21:15,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:21:15,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:21:15,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 214 transitions. [2023-11-21 22:21:15,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7039473684210527 [2023-11-21 22:21:15,223 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 214 transitions. [2023-11-21 22:21:15,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 214 transitions. [2023-11-21 22:21:15,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:21:15,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 214 transitions. [2023-11-21 22:21:15,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:15,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:15,226 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:15,227 INFO L175 Difference]: Start difference. First operand has 92 places, 78 transitions, 214 flow. Second operand 4 states and 214 transitions. [2023-11-21 22:21:15,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 89 transitions, 350 flow [2023-11-21 22:21:15,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 89 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:21:15,232 INFO L231 Difference]: Finished difference. Result has 93 places, 76 transitions, 223 flow [2023-11-21 22:21:15,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=93, PETRI_TRANSITIONS=76} [2023-11-21 22:21:15,233 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 16 predicate places. [2023-11-21 22:21:15,233 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 76 transitions, 223 flow [2023-11-21 22:21:15,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:15,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:21:15,234 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-21 22:21:15,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:21:15,235 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:21:15,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:15,235 INFO L85 PathProgramCache]: Analyzing trace with hash 171217838, now seen corresponding path program 1 times [2023-11-21 22:21:15,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:15,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717329059] [2023-11-21 22:21:15,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:15,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:15,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:15,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717329059] [2023-11-21 22:21:15,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717329059] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:21:15,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:21:15,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:21:15,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510193903] [2023-11-21 22:21:15,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:21:15,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:21:15,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:15,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:21:15,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:21:15,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 76 [2023-11-21 22:21:15,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 76 transitions, 223 flow. Second operand has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:15,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:21:15,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 76 [2023-11-21 22:21:15,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:21:16,218 INFO L124 PetriNetUnfolderBase]: 78/342 cut-off events. [2023-11-21 22:21:16,219 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-21 22:21:16,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 342 events. 78/342 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1652 event pairs, 60 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 575. Up to 147 conditions per place. [2023-11-21 22:21:16,223 INFO L140 encePairwiseOnDemand]: 66/76 looper letters, 50 selfloop transitions, 8 changer transitions 0/90 dead transitions. [2023-11-21 22:21:16,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 90 transitions, 367 flow [2023-11-21 22:21:16,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:21:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:21:16,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 255 transitions. [2023-11-21 22:21:16,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6710526315789473 [2023-11-21 22:21:16,226 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 255 transitions. [2023-11-21 22:21:16,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 255 transitions. [2023-11-21 22:21:16,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:21:16,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 255 transitions. [2023-11-21 22:21:16,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:16,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:16,230 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:16,230 INFO L175 Difference]: Start difference. First operand has 93 places, 76 transitions, 223 flow. Second operand 5 states and 255 transitions. [2023-11-21 22:21:16,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 90 transitions, 367 flow [2023-11-21 22:21:16,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 90 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:21:16,235 INFO L231 Difference]: Finished difference. Result has 98 places, 80 transitions, 267 flow [2023-11-21 22:21:16,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=98, PETRI_TRANSITIONS=80} [2023-11-21 22:21:16,236 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 21 predicate places. [2023-11-21 22:21:16,237 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 80 transitions, 267 flow [2023-11-21 22:21:16,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:16,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:21:16,238 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:21:16,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 22:21:16,238 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:21:16,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:16,239 INFO L85 PathProgramCache]: Analyzing trace with hash -234317450, now seen corresponding path program 1 times [2023-11-21 22:21:16,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:16,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382898258] [2023-11-21 22:21:16,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:16,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:16,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:16,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382898258] [2023-11-21 22:21:16,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382898258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:21:16,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:21:16,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 22:21:16,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695305725] [2023-11-21 22:21:16,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:21:16,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 22:21:16,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:16,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 22:21:16,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:21:17,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 76 [2023-11-21 22:21:17,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 80 transitions, 267 flow. Second operand has 8 states, 8 states have (on average 37.375) internal successors, (299), 8 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) [2023-11-21 22:21:17,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:21:17,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 76 [2023-11-21 22:21:17,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:21:17,437 INFO L124 PetriNetUnfolderBase]: 83/327 cut-off events. [2023-11-21 22:21:17,437 INFO L125 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2023-11-21 22:21:17,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665 conditions, 327 events. 83/327 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1478 event pairs, 81 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 607. Up to 207 conditions per place. [2023-11-21 22:21:17,441 INFO L140 encePairwiseOnDemand]: 67/76 looper letters, 38 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2023-11-21 22:21:17,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 78 transitions, 363 flow [2023-11-21 22:21:17,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:21:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-21 22:21:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 324 transitions. [2023-11-21 22:21:17,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5328947368421053 [2023-11-21 22:21:17,444 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 324 transitions. [2023-11-21 22:21:17,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 324 transitions. [2023-11-21 22:21:17,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:21:17,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 324 transitions. [2023-11-21 22:21:17,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 40.5) internal successors, (324), 8 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:17,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 76.0) internal successors, (684), 9 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:17,450 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 76.0) internal successors, (684), 9 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:17,451 INFO L175 Difference]: Start difference. First operand has 98 places, 80 transitions, 267 flow. Second operand 8 states and 324 transitions. [2023-11-21 22:21:17,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 78 transitions, 363 flow [2023-11-21 22:21:17,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 78 transitions, 355 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 22:21:17,456 INFO L231 Difference]: Finished difference. Result has 100 places, 78 transitions, 279 flow [2023-11-21 22:21:17,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=279, PETRI_PLACES=100, PETRI_TRANSITIONS=78} [2023-11-21 22:21:17,458 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 23 predicate places. [2023-11-21 22:21:17,458 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 78 transitions, 279 flow [2023-11-21 22:21:17,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 37.375) internal successors, (299), 8 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) [2023-11-21 22:21:17,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:21:17,460 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:21:17,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:21:17,460 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:21:17,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:17,461 INFO L85 PathProgramCache]: Analyzing trace with hash -234317449, now seen corresponding path program 1 times [2023-11-21 22:21:17,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:17,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671023082] [2023-11-21 22:21:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:17,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:18,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:18,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671023082] [2023-11-21 22:21:18,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671023082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:21:18,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:21:18,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:21:18,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913472158] [2023-11-21 22:21:18,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:21:18,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:21:18,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:18,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:21:18,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:21:18,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 76 [2023-11-21 22:21:18,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 78 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 37.57142857142857) internal successors, (263), 7 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:18,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:21:18,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 76 [2023-11-21 22:21:18,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:21:18,641 INFO L124 PetriNetUnfolderBase]: 83/323 cut-off events. [2023-11-21 22:21:18,641 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-11-21 22:21:18,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 323 events. 83/323 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1460 event pairs, 81 based on Foata normal form. 2/282 useless extension candidates. Maximal degree in co-relation 603. Up to 207 conditions per place. [2023-11-21 22:21:18,645 INFO L140 encePairwiseOnDemand]: 67/76 looper letters, 38 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2023-11-21 22:21:18,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 76 transitions, 375 flow [2023-11-21 22:21:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:21:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-21 22:21:18,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 324 transitions. [2023-11-21 22:21:18,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5328947368421053 [2023-11-21 22:21:18,648 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 324 transitions. [2023-11-21 22:21:18,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 324 transitions. [2023-11-21 22:21:18,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:21:18,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 324 transitions. [2023-11-21 22:21:18,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 40.5) internal successors, (324), 8 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:18,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 76.0) internal successors, (684), 9 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:18,654 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 76.0) internal successors, (684), 9 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:18,654 INFO L175 Difference]: Start difference. First operand has 100 places, 78 transitions, 279 flow. Second operand 8 states and 324 transitions. [2023-11-21 22:21:18,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 76 transitions, 375 flow [2023-11-21 22:21:18,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 76 transitions, 351 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-21 22:21:18,659 INFO L231 Difference]: Finished difference. Result has 98 places, 76 transitions, 275 flow [2023-11-21 22:21:18,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=275, PETRI_PLACES=98, PETRI_TRANSITIONS=76} [2023-11-21 22:21:18,660 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 21 predicate places. [2023-11-21 22:21:18,660 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 76 transitions, 275 flow [2023-11-21 22:21:18,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.57142857142857) internal successors, (263), 7 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:18,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:21:18,661 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:21:18,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 22:21:18,662 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:21:18,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:18,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1840754856, now seen corresponding path program 1 times [2023-11-21 22:21:18,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:18,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774995546] [2023-11-21 22:21:18,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:18,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:18,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:18,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774995546] [2023-11-21 22:21:18,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774995546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:21:18,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:21:18,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:21:18,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77669765] [2023-11-21 22:21:18,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:21:18,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:21:18,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:18,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:21:18,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:21:19,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 76 [2023-11-21 22:21:19,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 76 transitions, 275 flow. Second operand has 5 states, 5 states have (on average 43.4) internal successors, (217), 5 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:19,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:21:19,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 76 [2023-11-21 22:21:19,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:21:19,158 INFO L124 PetriNetUnfolderBase]: 68/298 cut-off events. [2023-11-21 22:21:19,158 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2023-11-21 22:21:19,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 298 events. 68/298 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1358 event pairs, 66 based on Foata normal form. 2/246 useless extension candidates. Maximal degree in co-relation 538. Up to 175 conditions per place. [2023-11-21 22:21:19,161 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 35 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-11-21 22:21:19,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 75 transitions, 365 flow [2023-11-21 22:21:19,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:21:19,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:21:19,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 236 transitions. [2023-11-21 22:21:19,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6210526315789474 [2023-11-21 22:21:19,164 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 236 transitions. [2023-11-21 22:21:19,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 236 transitions. [2023-11-21 22:21:19,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:21:19,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 236 transitions. [2023-11-21 22:21:19,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 47.2) internal successors, (236), 5 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:19,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:19,167 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:19,167 INFO L175 Difference]: Start difference. First operand has 98 places, 76 transitions, 275 flow. Second operand 5 states and 236 transitions. [2023-11-21 22:21:19,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 75 transitions, 365 flow [2023-11-21 22:21:19,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 75 transitions, 341 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-21 22:21:19,172 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 271 flow [2023-11-21 22:21:19,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-11-21 22:21:19,173 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 17 predicate places. [2023-11-21 22:21:19,173 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 271 flow [2023-11-21 22:21:19,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.4) internal successors, (217), 5 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:19,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:21:19,174 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:21:19,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 22:21:19,174 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:21:19,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:19,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1840754855, now seen corresponding path program 1 times [2023-11-21 22:21:19,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:19,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517715813] [2023-11-21 22:21:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:19,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:19,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:19,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517715813] [2023-11-21 22:21:19,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517715813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:21:19,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:21:19,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:21:19,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111222646] [2023-11-21 22:21:19,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:21:19,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:21:19,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:19,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:21:19,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:21:19,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 76 [2023-11-21 22:21:19,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 271 flow. Second operand has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:19,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:21:19,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 76 [2023-11-21 22:21:19,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:21:19,732 INFO L124 PetriNetUnfolderBase]: 68/296 cut-off events. [2023-11-21 22:21:19,732 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-11-21 22:21:19,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587 conditions, 296 events. 68/296 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1345 event pairs, 66 based on Foata normal form. 2/244 useless extension candidates. Maximal degree in co-relation 530. Up to 175 conditions per place. [2023-11-21 22:21:19,735 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 33 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2023-11-21 22:21:19,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 74 transitions, 357 flow [2023-11-21 22:21:19,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:21:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:21:19,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 264 transitions. [2023-11-21 22:21:19,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6947368421052632 [2023-11-21 22:21:19,737 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 264 transitions. [2023-11-21 22:21:19,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 264 transitions. [2023-11-21 22:21:19,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:21:19,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 264 transitions. [2023-11-21 22:21:19,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 52.8) internal successors, (264), 5 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:19,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:19,740 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:19,741 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 271 flow. Second operand 5 states and 264 transitions. [2023-11-21 22:21:19,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 74 transitions, 357 flow [2023-11-21 22:21:19,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 74 transitions, 335 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-21 22:21:19,745 INFO L231 Difference]: Finished difference. Result has 93 places, 74 transitions, 269 flow [2023-11-21 22:21:19,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=269, PETRI_PLACES=93, PETRI_TRANSITIONS=74} [2023-11-21 22:21:19,746 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 16 predicate places. [2023-11-21 22:21:19,746 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 74 transitions, 269 flow [2023-11-21 22:21:19,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:19,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:21:19,747 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:21:19,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 22:21:19,747 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:21:19,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:19,748 INFO L85 PathProgramCache]: Analyzing trace with hash 561125120, now seen corresponding path program 1 times [2023-11-21 22:21:19,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:19,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753382109] [2023-11-21 22:21:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:19,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:19,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:19,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753382109] [2023-11-21 22:21:19,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753382109] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:19,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685773243] [2023-11-21 22:21:19,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:19,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:19,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:21:19,844 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:21:19,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:21:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:20,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:21:20,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:21:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:20,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:21:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:20,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685773243] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:21:20,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:21:20,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-21 22:21:20,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496463803] [2023-11-21 22:21:20,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:21:20,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:21:20,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:20,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:21:20,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:21:20,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 76 [2023-11-21 22:21:20,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 74 transitions, 269 flow. Second operand has 7 states, 7 states have (on average 52.0) internal successors, (364), 7 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:20,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:21:20,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 76 [2023-11-21 22:21:20,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:21:20,286 INFO L124 PetriNetUnfolderBase]: 68/321 cut-off events. [2023-11-21 22:21:20,286 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2023-11-21 22:21:20,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 321 events. 68/321 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1301 event pairs, 66 based on Foata normal form. 3/270 useless extension candidates. Maximal degree in co-relation 598. Up to 171 conditions per place. [2023-11-21 22:21:20,289 INFO L140 encePairwiseOnDemand]: 72/76 looper letters, 55 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2023-11-21 22:21:20,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 91 transitions, 475 flow [2023-11-21 22:21:20,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:21:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 22:21:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 341 transitions. [2023-11-21 22:21:20,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7478070175438597 [2023-11-21 22:21:20,292 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 341 transitions. [2023-11-21 22:21:20,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 341 transitions. [2023-11-21 22:21:20,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:21:20,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 341 transitions. [2023-11-21 22:21:20,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.833333333333336) internal successors, (341), 6 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:20,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:20,295 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:20,295 INFO L175 Difference]: Start difference. First operand has 93 places, 74 transitions, 269 flow. Second operand 6 states and 341 transitions. [2023-11-21 22:21:20,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 91 transitions, 475 flow [2023-11-21 22:21:20,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 91 transitions, 425 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-21 22:21:20,300 INFO L231 Difference]: Finished difference. Result has 98 places, 77 transitions, 289 flow [2023-11-21 22:21:20,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=289, PETRI_PLACES=98, PETRI_TRANSITIONS=77} [2023-11-21 22:21:20,301 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 21 predicate places. [2023-11-21 22:21:20,302 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 77 transitions, 289 flow [2023-11-21 22:21:20,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 52.0) internal successors, (364), 7 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:20,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:21:20,302 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:21:20,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:21:20,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-21 22:21:20,523 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:21:20,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:20,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1924630155, now seen corresponding path program 1 times [2023-11-21 22:21:20,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:20,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717966035] [2023-11-21 22:21:20,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:20,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:21,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:21,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717966035] [2023-11-21 22:21:21,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717966035] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:21,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622953240] [2023-11-21 22:21:21,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:21,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:21,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:21:21,182 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:21:21,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:21:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:21,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-21 22:21:21,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:21:21,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:21:21,570 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 [2023-11-21 22:21:21,595 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-21 22:21:21,595 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 [2023-11-21 22:21:21,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:21:21,650 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 [2023-11-21 22:21:21,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:21:21,715 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 [2023-11-21 22:21:21,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:21:21,823 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 [2023-11-21 22:21:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:21,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:21:22,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:21:22,129 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 43 treesize of output 61 [2023-11-21 22:21:22,326 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-21 22:21:22,327 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 13 treesize of output 12 [2023-11-21 22:21:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:22,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622953240] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:21:22,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:21:22,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2023-11-21 22:21:22,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994297980] [2023-11-21 22:21:22,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:21:22,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-21 22:21:22,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:22,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-21 22:21:22,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:21:25,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 76 [2023-11-21 22:21:25,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 77 transitions, 289 flow. Second operand has 19 states, 19 states have (on average 43.05263157894737) internal successors, (818), 19 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:25,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:21:25,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 76 [2023-11-21 22:21:25,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:21:26,418 INFO L124 PetriNetUnfolderBase]: 78/353 cut-off events. [2023-11-21 22:21:26,418 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-21 22:21:26,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 353 events. 78/353 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1524 event pairs, 60 based on Foata normal form. 3/298 useless extension candidates. Maximal degree in co-relation 646. Up to 141 conditions per place. [2023-11-21 22:21:26,422 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 66 selfloop transitions, 8 changer transitions 0/100 dead transitions. [2023-11-21 22:21:26,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 505 flow [2023-11-21 22:21:26,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:21:26,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 22:21:26,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 357 transitions. [2023-11-21 22:21:26,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6710526315789473 [2023-11-21 22:21:26,425 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 357 transitions. [2023-11-21 22:21:26,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 357 transitions. [2023-11-21 22:21:26,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:21:26,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 357 transitions. [2023-11-21 22:21:26,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:26,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 76.0) internal successors, (608), 8 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:26,429 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 76.0) internal successors, (608), 8 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:26,429 INFO L175 Difference]: Start difference. First operand has 98 places, 77 transitions, 289 flow. Second operand 7 states and 357 transitions. [2023-11-21 22:21:26,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 505 flow [2023-11-21 22:21:26,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 100 transitions, 495 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-21 22:21:26,434 INFO L231 Difference]: Finished difference. Result has 106 places, 77 transitions, 315 flow [2023-11-21 22:21:26,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=315, PETRI_PLACES=106, PETRI_TRANSITIONS=77} [2023-11-21 22:21:26,435 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 29 predicate places. [2023-11-21 22:21:26,436 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 77 transitions, 315 flow [2023-11-21 22:21:26,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 43.05263157894737) internal successors, (818), 19 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:26,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:21:26,436 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2023-11-21 22:21:26,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:21:26,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-21 22:21:26,653 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:21:26,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:26,654 INFO L85 PathProgramCache]: Analyzing trace with hash 877587733, now seen corresponding path program 2 times [2023-11-21 22:21:26,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:26,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795330087] [2023-11-21 22:21:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:26,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:27,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:27,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795330087] [2023-11-21 22:21:27,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795330087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:27,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777274081] [2023-11-21 22:21:27,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:21:27,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:27,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:21:27,010 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:21:27,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:21:27,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:21:27,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:21:27,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 22:21:27,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:21:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:27,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:21:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:27,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777274081] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:21:27,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:21:27,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-21 22:21:27,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958758400] [2023-11-21 22:21:27,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:21:27,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 22:21:27,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:27,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 22:21:27,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:21:27,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 76 [2023-11-21 22:21:27,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 77 transitions, 315 flow. Second operand has 13 states, 13 states have (on average 53.38461538461539) internal successors, (694), 13 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:27,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:21:27,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 76 [2023-11-21 22:21:27,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:21:27,837 INFO L124 PetriNetUnfolderBase]: 68/381 cut-off events. [2023-11-21 22:21:27,838 INFO L125 PetriNetUnfolderBase]: For 317/317 co-relation queries the response was YES. [2023-11-21 22:21:27,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 869 conditions, 381 events. 68/381 cut-off events. For 317/317 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1306 event pairs, 66 based on Foata normal form. 6/333 useless extension candidates. Maximal degree in co-relation 803. Up to 171 conditions per place. [2023-11-21 22:21:27,842 INFO L140 encePairwiseOnDemand]: 72/76 looper letters, 91 selfloop transitions, 12 changer transitions 0/132 dead transitions. [2023-11-21 22:21:27,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 132 transitions, 781 flow [2023-11-21 22:21:27,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:21:27,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-21 22:21:27,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 674 transitions. [2023-11-21 22:21:27,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7390350877192983 [2023-11-21 22:21:27,846 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 674 transitions. [2023-11-21 22:21:27,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 674 transitions. [2023-11-21 22:21:27,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:21:27,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 674 transitions. [2023-11-21 22:21:27,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 56.166666666666664) internal successors, (674), 12 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:27,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 76.0) internal successors, (988), 13 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:27,852 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 76.0) internal successors, (988), 13 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:27,852 INFO L175 Difference]: Start difference. First operand has 106 places, 77 transitions, 315 flow. Second operand 12 states and 674 transitions. [2023-11-21 22:21:27,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 132 transitions, 781 flow [2023-11-21 22:21:27,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 132 transitions, 758 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-21 22:21:27,860 INFO L231 Difference]: Finished difference. Result has 119 places, 84 transitions, 417 flow [2023-11-21 22:21:27,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=417, PETRI_PLACES=119, PETRI_TRANSITIONS=84} [2023-11-21 22:21:27,862 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 42 predicate places. [2023-11-21 22:21:27,862 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 84 transitions, 417 flow [2023-11-21 22:21:27,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 53.38461538461539) internal successors, (694), 13 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:27,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:21:27,863 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2023-11-21 22:21:27,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:21:28,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-21 22:21:28,078 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:21:28,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:28,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1548230218, now seen corresponding path program 2 times [2023-11-21 22:21:28,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:28,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538390120] [2023-11-21 22:21:28,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:28,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:31,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:31,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538390120] [2023-11-21 22:21:31,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538390120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:31,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876568898] [2023-11-21 22:21:31,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:21:31,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:31,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:21:31,030 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:21:31,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:21:31,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:21:31,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:21:31,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-21 22:21:31,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:21:31,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:21:31,562 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 [2023-11-21 22:21:31,579 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-21 22:21:31,580 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 [2023-11-21 22:21:31,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:21:31,624 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 [2023-11-21 22:21:31,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:21:31,689 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 [2023-11-21 22:21:31,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:21:31,794 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 [2023-11-21 22:21:31,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:21:31,854 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 [2023-11-21 22:21:32,018 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 22:21:32,018 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 [2023-11-21 22:21:32,030 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 [2023-11-21 22:21:32,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-21 22:21:32,179 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-21 22:21:32,180 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 [2023-11-21 22:21:32,197 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 22:21:32,198 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 [2023-11-21 22:21:32,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 12 [2023-11-21 22:21:32,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 12 [2023-11-21 22:21:32,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:21:32,422 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 [2023-11-21 22:21:32,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:21:32,489 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 [2023-11-21 22:21:32,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:21:32,596 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 [2023-11-21 22:21:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:32,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:21:32,948 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:21:32,949 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 43 treesize of output 61 [2023-11-21 22:21:33,139 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-21 22:21:33,140 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 13 treesize of output 12 [2023-11-21 22:21:33,529 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:21:33,530 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 43 treesize of output 61 [2023-11-21 22:21:33,700 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-21 22:21:33,700 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 13 treesize of output 12 [2023-11-21 22:21:34,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:21:34,126 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 43 treesize of output 61 [2023-11-21 22:21:34,299 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-21 22:21:34,299 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 13 treesize of output 12 [2023-11-21 22:21:34,762 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:21:34,763 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 43 treesize of output 61 [2023-11-21 22:21:34,922 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-21 22:21:34,923 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 13 treesize of output 12 [2023-11-21 22:21:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:21:35,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876568898] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:21:35,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:21:35,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 11] total 42 [2023-11-21 22:21:35,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543906321] [2023-11-21 22:21:35,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:21:35,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-21 22:21:35,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:35,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-21 22:21:35,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2023-11-21 22:21:46,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 76 [2023-11-21 22:21:46,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 84 transitions, 417 flow. Second operand has 44 states, 44 states have (on average 34.20454545454545) internal successors, (1505), 44 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:46,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:21:46,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 76 [2023-11-21 22:21:46,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:21:49,099 INFO L124 PetriNetUnfolderBase]: 95/440 cut-off events. [2023-11-21 22:21:49,099 INFO L125 PetriNetUnfolderBase]: For 318/318 co-relation queries the response was YES. [2023-11-21 22:21:49,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1031 conditions, 440 events. 95/440 cut-off events. For 318/318 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1608 event pairs, 73 based on Foata normal form. 6/403 useless extension candidates. Maximal degree in co-relation 959. Up to 169 conditions per place. [2023-11-21 22:21:49,105 INFO L140 encePairwiseOnDemand]: 66/76 looper letters, 133 selfloop transitions, 19 changer transitions 0/172 dead transitions. [2023-11-21 22:21:49,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 172 transitions, 1008 flow [2023-11-21 22:21:49,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 22:21:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-21 22:21:49,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 675 transitions. [2023-11-21 22:21:49,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224458204334366 [2023-11-21 22:21:49,111 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 675 transitions. [2023-11-21 22:21:49,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 675 transitions. [2023-11-21 22:21:49,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:21:49,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 675 transitions. [2023-11-21 22:21:49,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 39.705882352941174) internal successors, (675), 17 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:49,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 76.0) internal successors, (1368), 18 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:49,120 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 76.0) internal successors, (1368), 18 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:49,121 INFO L175 Difference]: Start difference. First operand has 119 places, 84 transitions, 417 flow. Second operand 17 states and 675 transitions. [2023-11-21 22:21:49,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 172 transitions, 1008 flow [2023-11-21 22:21:49,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 172 transitions, 1002 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 22:21:49,131 INFO L231 Difference]: Finished difference. Result has 144 places, 90 transitions, 533 flow [2023-11-21 22:21:49,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=533, PETRI_PLACES=144, PETRI_TRANSITIONS=90} [2023-11-21 22:21:49,132 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2023-11-21 22:21:49,132 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 90 transitions, 533 flow [2023-11-21 22:21:49,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 34.20454545454545) internal successors, (1505), 44 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:49,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:21:49,134 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1] [2023-11-21 22:21:49,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:21:49,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_827d7cf6-cba8-4ba1-99dc-f7df8c0c5c04/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-21 22:21:49,358 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:21:49,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:49,359 INFO L85 PathProgramCache]: Analyzing trace with hash -849891073, now seen corresponding path program 3 times [2023-11-21 22:21:49,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:49,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290801807] [2023-11-21 22:21:49,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:49,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat