./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 e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/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_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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-e7bb482 [2023-11-06 22:55:02,781 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:55:02,880 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:55:02,888 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:55:02,889 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:55:02,918 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:55:02,919 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:55:02,920 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:55:02,920 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:55:02,921 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:55:02,922 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:55:02,922 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:55:02,923 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:55:02,924 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:55:02,924 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:55:02,925 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:55:02,926 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:55:02,926 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:55:02,927 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:55:02,927 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:55:02,928 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:55:02,929 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:55:02,929 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:55:02,930 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:55:02,930 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:55:02,931 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:55:02,931 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:55:02,932 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:55:02,932 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:55:02,933 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:55:02,933 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:55:02,933 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:55:02,934 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:55:02,934 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:55:02,934 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:55:02,934 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:55:02,935 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:55:02,935 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:55:02,935 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_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c4f9d381010c40c0aeec814019363f065d1b11569cf33ee927950bcd4ef29f20 [2023-11-06 22:55:03,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:55:03,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:55:03,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:55:03,240 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:55:03,241 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:55:03,245 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2023-11-06 22:55:06,640 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:55:07,081 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:55:07,082 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2023-11-06 22:55:07,111 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/data/5822bb893/77a59be96cc7459eb8b493c709d22a30/FLAGf486969a7 [2023-11-06 22:55:07,131 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/data/5822bb893/77a59be96cc7459eb8b493c709d22a30 [2023-11-06 22:55:07,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:55:07,147 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:55:07,151 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:55:07,151 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:55:07,159 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:55:07,160 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:07" (1/1) ... [2023-11-06 22:55:07,161 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ee2ba10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:07, skipping insertion in model container [2023-11-06 22:55:07,161 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:07" (1/1) ... [2023-11-06 22:55:07,252 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:55:08,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:55:08,131 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:55:08,268 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:55:08,446 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:55:08,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:08 WrapperNode [2023-11-06 22:55:08,447 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:55:08,449 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:55:08,449 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:55:08,449 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:55:08,458 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:08" (1/1) ... [2023-11-06 22:55:08,514 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:08" (1/1) ... [2023-11-06 22:55:08,570 INFO L138 Inliner]: procedures = 370, calls = 30, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 127 [2023-11-06 22:55:08,575 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:55:08,575 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:55:08,576 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:55:08,576 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:55:08,588 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:08" (1/1) ... [2023-11-06 22:55:08,588 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:08" (1/1) ... [2023-11-06 22:55:08,594 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:08" (1/1) ... [2023-11-06 22:55:08,594 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:08" (1/1) ... [2023-11-06 22:55:08,615 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:08" (1/1) ... [2023-11-06 22:55:08,630 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:08" (1/1) ... [2023-11-06 22:55:08,633 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:08" (1/1) ... [2023-11-06 22:55:08,647 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:08" (1/1) ... [2023-11-06 22:55:08,652 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:55:08,653 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:55:08,654 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:55:08,654 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:55:08,655 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:08" (1/1) ... [2023-11-06 22:55:08,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:55:08,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:08,694 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:55:08,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:55:08,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:55:08,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 22:55:08,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:55:08,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:55:08,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:55:08,752 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:55:08,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:55:08,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:55:08,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 22:55:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 22:55:08,753 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 22:55:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:55:08,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:55:08,757 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:55:08,985 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:55:08,988 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:55:09,574 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:55:09,586 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:55:09,586 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:55:09,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:09 BoogieIcfgContainer [2023-11-06 22:55:09,590 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:55:09,592 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:55:09,593 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:55:09,597 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:55:09,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:55:07" (1/3) ... [2023-11-06 22:55:09,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@db1108b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:09, skipping insertion in model container [2023-11-06 22:55:09,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:08" (2/3) ... [2023-11-06 22:55:09,599 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@db1108b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:09, skipping insertion in model container [2023-11-06 22:55:09,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:09" (3/3) ... [2023-11-06 22:55:09,601 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_11-arraylist_nr.i [2023-11-06 22:55:09,621 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:55:09,621 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-06 22:55:09,622 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:55:09,744 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:55:09,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 194 transitions, 392 flow [2023-11-06 22:55:09,918 INFO L124 PetriNetUnfolderBase]: 6/193 cut-off events. [2023-11-06 22:55:09,919 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:55:09,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 193 events. 6/193 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 413 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-11-06 22:55:09,935 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 194 transitions, 392 flow [2023-11-06 22:55:09,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 193 transitions, 389 flow [2023-11-06 22:55:09,953 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:55:09,966 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 193 transitions, 389 flow [2023-11-06 22:55:09,970 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 193 transitions, 389 flow [2023-11-06 22:55:09,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 193 transitions, 389 flow [2023-11-06 22:55:10,046 INFO L124 PetriNetUnfolderBase]: 6/193 cut-off events. [2023-11-06 22:55:10,047 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:55:10,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 193 events. 6/193 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 413 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-11-06 22:55:10,052 INFO L119 LiptonReduction]: Number of co-enabled transitions 3192 [2023-11-06 22:55:37,449 WARN L293 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 176 DAG size of output: 166 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-06 22:55:44,988 INFO L134 LiptonReduction]: Checked pairs total: 10845 [2023-11-06 22:55:44,989 INFO L136 LiptonReduction]: Total number of compositions: 224 [2023-11-06 22:55:45,007 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:55:45,014 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;@4e35601d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:55:45,014 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-06 22:55:45,021 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:55:45,021 INFO L124 PetriNetUnfolderBase]: 2/5 cut-off events. [2023-11-06 22:55:45,022 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:55:45,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:45,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:55:45,024 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 22:55:45,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:45,030 INFO L85 PathProgramCache]: Analyzing trace with hash 705918, now seen corresponding path program 1 times [2023-11-06 22:55:45,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:45,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973983105] [2023-11-06 22:55:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:45,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:45,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:45,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973983105] [2023-11-06 22:55:45,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973983105] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:55:45,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:55:45,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:55:45,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35709513] [2023-11-06 22:55:45,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:55:45,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:55:45,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:45,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:55:45,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:55:45,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 418 [2023-11-06 22:55:45,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:45,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:45,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 418 [2023-11-06 22:55:45,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:45,833 INFO L124 PetriNetUnfolderBase]: 130/334 cut-off events. [2023-11-06 22:55:45,834 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:55:45,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 334 events. 130/334 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1609 event pairs, 128 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 603. Up to 291 conditions per place. [2023-11-06 22:55:45,840 INFO L140 encePairwiseOnDemand]: 397/418 looper letters, 33 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-11-06 22:55:45,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 163 flow [2023-11-06 22:55:45,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:55:45,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:55:45,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 603 transitions. [2023-11-06 22:55:45,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48086124401913877 [2023-11-06 22:55:45,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 603 transitions. [2023-11-06 22:55:45,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 603 transitions. [2023-11-06 22:55:45,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:45,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 603 transitions. [2023-11-06 22:55:45,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:45,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:45,892 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:45,894 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 127 flow. Second operand 3 states and 603 transitions. [2023-11-06 22:55:45,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 163 flow [2023-11-06 22:55:45,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 162 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:55:45,901 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 102 flow [2023-11-06 22:55:45,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-06 22:55:45,911 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -16 predicate places. [2023-11-06 22:55:45,912 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 102 flow [2023-11-06 22:55:45,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:45,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:45,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:55:45,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:55:45,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 22:55:45,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:45,915 INFO L85 PathProgramCache]: Analyzing trace with hash 21832542, now seen corresponding path program 1 times [2023-11-06 22:55:45,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:45,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51994625] [2023-11-06 22:55:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:45,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:46,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:46,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51994625] [2023-11-06 22:55:46,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51994625] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:46,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55035829] [2023-11-06 22:55:46,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:46,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:46,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:46,124 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:46,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:55:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:46,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:55:46,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:55:46,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:55:46,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55035829] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:55:46,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:55:46,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-11-06 22:55:46,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96625903] [2023-11-06 22:55:46,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:55:46,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:55:46,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:46,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:55:46,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:55:46,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 418 [2023-11-06 22:55:46,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:46,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:46,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 418 [2023-11-06 22:55:46,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:46,536 INFO L124 PetriNetUnfolderBase]: 130/337 cut-off events. [2023-11-06 22:55:46,537 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:55:46,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 337 events. 130/337 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1618 event pairs, 128 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 631. Up to 292 conditions per place. [2023-11-06 22:55:46,542 INFO L140 encePairwiseOnDemand]: 413/418 looper letters, 36 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-11-06 22:55:46,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 184 flow [2023-11-06 22:55:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:55:46,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:55:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 589 transitions. [2023-11-06 22:55:46,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2023-11-06 22:55:46,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 589 transitions. [2023-11-06 22:55:46,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 589 transitions. [2023-11-06 22:55:46,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:46,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 589 transitions. [2023-11-06 22:55:46,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:46,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:46,560 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:46,560 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 102 flow. Second operand 3 states and 589 transitions. [2023-11-06 22:55:46,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 184 flow [2023-11-06 22:55:46,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 48 transitions, 180 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:55:46,564 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 114 flow [2023-11-06 22:55:46,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-06 22:55:46,566 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -14 predicate places. [2023-11-06 22:55:46,566 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 114 flow [2023-11-06 22:55:46,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:46,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:46,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:55:46,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:46,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 22:55:46,776 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 22:55:46,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:46,777 INFO L85 PathProgramCache]: Analyzing trace with hash 21832577, now seen corresponding path program 1 times [2023-11-06 22:55:46,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:46,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468543767] [2023-11-06 22:55:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:46,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:46,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:46,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468543767] [2023-11-06 22:55:46,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468543767] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:46,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877944015] [2023-11-06 22:55:46,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:46,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:46,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:46,958 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:46,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:55:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:47,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:55:47,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:47,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:47,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877944015] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:47,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:47,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:55:47,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772349157] [2023-11-06 22:55:47,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:47,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:55:47,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:47,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:55:47,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:55:47,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 418 [2023-11-06 22:55:47,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 114 flow. Second operand has 7 states, 7 states have (on average 183.28571428571428) internal successors, (1283), 7 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:47,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:47,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 418 [2023-11-06 22:55:47,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:47,568 INFO L124 PetriNetUnfolderBase]: 130/340 cut-off events. [2023-11-06 22:55:47,568 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:55:47,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 340 events. 130/340 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1626 event pairs, 128 based on Foata normal form. 3/225 useless extension candidates. Maximal degree in co-relation 631. Up to 294 conditions per place. [2023-11-06 22:55:47,576 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 34 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-11-06 22:55:47,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 204 flow [2023-11-06 22:55:47,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:55:47,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:55:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1133 transitions. [2023-11-06 22:55:47,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4517543859649123 [2023-11-06 22:55:47,583 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1133 transitions. [2023-11-06 22:55:47,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1133 transitions. [2023-11-06 22:55:47,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:47,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1133 transitions. [2023-11-06 22:55:47,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 188.83333333333334) internal successors, (1133), 6 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:47,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 418.0) internal successors, (2926), 7 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:47,601 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 418.0) internal successors, (2926), 7 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:47,601 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 114 flow. Second operand 6 states and 1133 transitions. [2023-11-06 22:55:47,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 204 flow [2023-11-06 22:55:47,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 49 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:55:47,607 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 148 flow [2023-11-06 22:55:47,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2023-11-06 22:55:47,609 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -7 predicate places. [2023-11-06 22:55:47,609 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 148 flow [2023-11-06 22:55:47,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 183.28571428571428) internal successors, (1283), 7 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:47,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:47,612 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-06 22:55:47,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:47,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:47,819 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 22:55:47,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:47,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1822637473, now seen corresponding path program 2 times [2023-11-06 22:55:47,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:47,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192335318] [2023-11-06 22:55:47,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:47,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:48,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:48,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192335318] [2023-11-06 22:55:48,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192335318] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:48,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238640246] [2023-11-06 22:55:48,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:55:48,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:48,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:48,064 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:48,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:55:48,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:55:48,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:48,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:55:48,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:48,290 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-06 22:55:48,292 INFO L351 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 [2023-11-06 22:55:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:55:48,299 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:55:48,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238640246] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:55:48,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:55:48,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-11-06 22:55:48,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696127456] [2023-11-06 22:55:48,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:55:48,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:55:48,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:48,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:55:48,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:55:48,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-11-06 22:55:48,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:48,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:48,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-11-06 22:55:48,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:48,689 INFO L124 PetriNetUnfolderBase]: 131/346 cut-off events. [2023-11-06 22:55:48,689 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:55:48,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 346 events. 131/346 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1632 event pairs, 97 based on Foata normal form. 17/241 useless extension candidates. Maximal degree in co-relation 644. Up to 229 conditions per place. [2023-11-06 22:55:48,697 INFO L140 encePairwiseOnDemand]: 413/418 looper letters, 53 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-11-06 22:55:48,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 286 flow [2023-11-06 22:55:48,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:55:48,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:55:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-11-06 22:55:48,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4824561403508772 [2023-11-06 22:55:48,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-11-06 22:55:48,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-11-06 22:55:48,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:48,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-11-06 22:55:48,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:48,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:48,721 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:48,721 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 148 flow. Second operand 3 states and 605 transitions. [2023-11-06 22:55:48,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 286 flow [2023-11-06 22:55:48,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 272 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 22:55:48,726 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 138 flow [2023-11-06 22:55:48,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2023-11-06 22:55:48,729 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -7 predicate places. [2023-11-06 22:55:48,729 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 138 flow [2023-11-06 22:55:48,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:48,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:48,730 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-06 22:55:48,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:48,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:48,938 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 22:55:48,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:48,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1822637469, now seen corresponding path program 1 times [2023-11-06 22:55:48,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:48,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564779117] [2023-11-06 22:55:48,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:48,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:49,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:49,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564779117] [2023-11-06 22:55:49,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564779117] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:49,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436989187] [2023-11-06 22:55:49,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:49,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:49,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:49,056 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:49,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:55:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:49,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:55:49,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:49,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:49,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436989187] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:49,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:49,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-06 22:55:49,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673514085] [2023-11-06 22:55:49,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:49,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:55:49,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:49,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:55:49,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:55:49,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 418 [2023-11-06 22:55:49,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 138 flow. Second operand has 12 states, 12 states have (on average 183.08333333333334) internal successors, (2197), 12 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:49,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:49,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 418 [2023-11-06 22:55:49,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:49,779 INFO L124 PetriNetUnfolderBase]: 130/338 cut-off events. [2023-11-06 22:55:49,780 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-06 22:55:49,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 338 events. 130/338 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1547 event pairs, 128 based on Foata normal form. 6/229 useless extension candidates. Maximal degree in co-relation 662. Up to 292 conditions per place. [2023-11-06 22:55:49,784 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 33 selfloop transitions, 11 changer transitions 0/53 dead transitions. [2023-11-06 22:55:49,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 53 transitions, 262 flow [2023-11-06 22:55:49,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:55:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:55:49,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2233 transitions. [2023-11-06 22:55:49,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451754385964912 [2023-11-06 22:55:49,797 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2233 transitions. [2023-11-06 22:55:49,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2233 transitions. [2023-11-06 22:55:49,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:49,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2233 transitions. [2023-11-06 22:55:49,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.08333333333334) internal successors, (2233), 12 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:49,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 418.0) internal successors, (5434), 13 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:49,823 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 418.0) internal successors, (5434), 13 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:49,823 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 138 flow. Second operand 12 states and 2233 transitions. [2023-11-06 22:55:49,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 53 transitions, 262 flow [2023-11-06 22:55:49,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 53 transitions, 258 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:55:49,828 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 218 flow [2023-11-06 22:55:49,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=218, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2023-11-06 22:55:49,829 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 8 predicate places. [2023-11-06 22:55:49,830 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 218 flow [2023-11-06 22:55:49,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.08333333333334) internal successors, (2197), 12 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:49,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:49,832 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-06 22:55:49,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:50,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:50,038 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 22:55:50,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:50,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1460629917, now seen corresponding path program 2 times [2023-11-06 22:55:50,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:50,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703378442] [2023-11-06 22:55:50,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:50,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:55:50,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:50,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703378442] [2023-11-06 22:55:50,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703378442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:55:50,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:55:50,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:55:50,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806686260] [2023-11-06 22:55:50,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:55:50,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:55:50,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:50,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:55:50,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:55:50,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 418 [2023-11-06 22:55:50,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 53 transitions, 218 flow. Second operand has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:50,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:50,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 418 [2023-11-06 22:55:50,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:51,261 INFO L124 PetriNetUnfolderBase]: 147/387 cut-off events. [2023-11-06 22:55:51,261 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-06 22:55:51,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 387 events. 147/387 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1778 event pairs, 113 based on Foata normal form. 1/262 useless extension candidates. Maximal degree in co-relation 736. Up to 266 conditions per place. [2023-11-06 22:55:51,266 INFO L140 encePairwiseOnDemand]: 413/418 looper letters, 58 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-11-06 22:55:51,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 374 flow [2023-11-06 22:55:51,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:55:51,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:55:51,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 721 transitions. [2023-11-06 22:55:51,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312200956937799 [2023-11-06 22:55:51,271 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 721 transitions. [2023-11-06 22:55:51,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 721 transitions. [2023-11-06 22:55:51,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:51,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 721 transitions. [2023-11-06 22:55:51,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 180.25) internal successors, (721), 4 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:51,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 418.0) internal successors, (2090), 5 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:51,284 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 418.0) internal successors, (2090), 5 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:51,284 INFO L175 Difference]: Start difference. First operand has 72 places, 53 transitions, 218 flow. Second operand 4 states and 721 transitions. [2023-11-06 22:55:51,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 374 flow [2023-11-06 22:55:51,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 324 flow, removed 20 selfloop flow, removed 5 redundant places. [2023-11-06 22:55:51,296 INFO L231 Difference]: Finished difference. Result has 71 places, 53 transitions, 180 flow [2023-11-06 22:55:51,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=71, PETRI_TRANSITIONS=53} [2023-11-06 22:55:51,299 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 7 predicate places. [2023-11-06 22:55:51,300 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 53 transitions, 180 flow [2023-11-06 22:55:51,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:51,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:51,301 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-11-06 22:55:51,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:55:51,301 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 22:55:51,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:51,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1965111355, now seen corresponding path program 1 times [2023-11-06 22:55:51,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:51,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154033736] [2023-11-06 22:55:51,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:51,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:55:51,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:51,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154033736] [2023-11-06 22:55:51,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154033736] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:51,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269237892] [2023-11-06 22:55:51,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:51,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:51,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:51,460 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:51,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:55:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:51,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:55:51,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:55:51,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:55:51,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269237892] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:51,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:51,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:55:51,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393262459] [2023-11-06 22:55:51,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:51,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:55:51,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:51,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:55:51,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:55:51,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 418 [2023-11-06 22:55:51,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 53 transitions, 180 flow. Second operand has 7 states, 7 states have (on average 183.42857142857142) internal successors, (1284), 7 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:51,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:51,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 418 [2023-11-06 22:55:51,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:52,238 INFO L124 PetriNetUnfolderBase]: 131/343 cut-off events. [2023-11-06 22:55:52,238 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-11-06 22:55:52,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 343 events. 131/343 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1539 event pairs, 128 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 687. Up to 299 conditions per place. [2023-11-06 22:55:52,242 INFO L140 encePairwiseOnDemand]: 412/418 looper letters, 44 selfloop transitions, 6 changer transitions 0/59 dead transitions. [2023-11-06 22:55:52,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 59 transitions, 304 flow [2023-11-06 22:55:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:55:52,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:55:52,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1141 transitions. [2023-11-06 22:55:52,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45494417862838915 [2023-11-06 22:55:52,249 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1141 transitions. [2023-11-06 22:55:52,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1141 transitions. [2023-11-06 22:55:52,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:52,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1141 transitions. [2023-11-06 22:55:52,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 190.16666666666666) internal successors, (1141), 6 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:52,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 418.0) internal successors, (2926), 7 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:52,262 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 418.0) internal successors, (2926), 7 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:52,262 INFO L175 Difference]: Start difference. First operand has 71 places, 53 transitions, 180 flow. Second operand 6 states and 1141 transitions. [2023-11-06 22:55:52,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 59 transitions, 304 flow [2023-11-06 22:55:52,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 59 transitions, 296 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:55:52,266 INFO L231 Difference]: Finished difference. Result has 77 places, 57 transitions, 232 flow [2023-11-06 22:55:52,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=77, PETRI_TRANSITIONS=57} [2023-11-06 22:55:52,267 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 13 predicate places. [2023-11-06 22:55:52,268 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 57 transitions, 232 flow [2023-11-06 22:55:52,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 183.42857142857142) internal successors, (1284), 7 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:52,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:52,269 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-11-06 22:55:52,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 22:55:52,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:52,475 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 22:55:52,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:52,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1965111324, now seen corresponding path program 1 times [2023-11-06 22:55:52,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:52,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122648930] [2023-11-06 22:55:52,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:52,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:55:53,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:53,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122648930] [2023-11-06 22:55:53,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122648930] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:53,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627303144] [2023-11-06 22:55:53,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:53,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:53,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:53,436 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:53,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:55:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:53,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:55:53,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:53,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:55:53,859 INFO L351 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 [2023-11-06 22:55:53,887 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-06 22:55:53,887 INFO L351 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 [2023-11-06 22:55:53,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:55:53,958 INFO L351 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 [2023-11-06 22:55:53,975 INFO L322 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-06 22:55:53,975 INFO L351 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 23 treesize of output 16 [2023-11-06 22:55:53,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:55:54,013 INFO L322 Elim1Store]: treesize reduction 55, result has 1.8 percent of original size [2023-11-06 22:55:54,014 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2023-11-06 22:55:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:55:54,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:55:56,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627303144] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:56,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:56,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-11-06 22:55:56,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021904572] [2023-11-06 22:55:56,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:56,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:55:56,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:56,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:55:56,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:56:01,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:56:03,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:56:04,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 418 [2023-11-06 22:56:04,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 57 transitions, 232 flow. Second operand has 11 states, 11 states have (on average 167.36363636363637) internal successors, (1841), 11 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:04,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:04,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 418 [2023-11-06 22:56:04,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:06,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:56:07,573 INFO L124 PetriNetUnfolderBase]: 147/390 cut-off events. [2023-11-06 22:56:07,574 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2023-11-06 22:56:07,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 824 conditions, 390 events. 147/390 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1789 event pairs, 113 based on Foata normal form. 3/268 useless extension candidates. Maximal degree in co-relation 767. Up to 266 conditions per place. [2023-11-06 22:56:07,578 INFO L140 encePairwiseOnDemand]: 413/418 looper letters, 58 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2023-11-06 22:56:07,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 72 transitions, 388 flow [2023-11-06 22:56:07,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:56:07,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:56:07,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1220 transitions. [2023-11-06 22:56:07,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169514695830485 [2023-11-06 22:56:07,586 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1220 transitions. [2023-11-06 22:56:07,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1220 transitions. [2023-11-06 22:56:07,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:07,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1220 transitions. [2023-11-06 22:56:07,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 174.28571428571428) internal successors, (1220), 7 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:07,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 418.0) internal successors, (3344), 8 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:07,601 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 418.0) internal successors, (3344), 8 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:07,601 INFO L175 Difference]: Start difference. First operand has 77 places, 57 transitions, 232 flow. Second operand 7 states and 1220 transitions. [2023-11-06 22:56:07,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 72 transitions, 388 flow [2023-11-06 22:56:07,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 72 transitions, 369 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-06 22:56:07,606 INFO L231 Difference]: Finished difference. Result has 80 places, 56 transitions, 221 flow [2023-11-06 22:56:07,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=221, PETRI_PLACES=80, PETRI_TRANSITIONS=56} [2023-11-06 22:56:07,609 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 16 predicate places. [2023-11-06 22:56:07,610 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 56 transitions, 221 flow [2023-11-06 22:56:07,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 167.36363636363637) internal successors, (1841), 11 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:07,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:07,611 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 1, 1, 1] [2023-11-06 22:56:07,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:07,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:07,818 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 22:56:07,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:07,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2069252957, now seen corresponding path program 2 times [2023-11-06 22:56:07,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:07,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830467921] [2023-11-06 22:56:07,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:07,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:56:10,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:10,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830467921] [2023-11-06 22:56:10,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830467921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:10,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449593796] [2023-11-06 22:56:10,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:56:10,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:10,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:10,756 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:10,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a67b2f2-6ffe-46e8-817c-404c77ebce21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:56:11,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:56:11,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:11,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-06 22:56:11,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:11,367 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-06 22:56:11,368 INFO L351 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 [2023-11-06 22:56:11,377 INFO L351 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 [2023-11-06 22:56:11,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:56:11,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:56:11,438 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-06 22:56:11,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:56:11,457 INFO L351 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 [2023-11-06 22:56:11,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:56:11,539 INFO L322 Elim1Store]: treesize reduction 34, result has 29.2 percent of original size [2023-11-06 22:56:11,540 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 35 [2023-11-06 22:56:11,568 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 22:56:11,569 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 13 [2023-11-06 22:56:11,627 INFO L322 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-06 22:56:11,627 INFO L351 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 18 treesize of output 13 [2023-11-06 22:56:11,642 INFO L351 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 [2023-11-06 22:56:11,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:56:11,786 INFO L322 Elim1Store]: treesize reduction 42, result has 25.0 percent of original size [2023-11-06 22:56:11,787 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 57 [2023-11-06 22:56:11,802 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 22:56:11,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:56:11,818 INFO L351 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 32 treesize of output 25 [2023-11-06 22:56:11,832 INFO L322 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2023-11-06 22:56:11,833 INFO L351 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 23 treesize of output 1 [2023-11-06 22:56:11,897 INFO L322 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-11-06 22:56:11,898 INFO L351 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 21 treesize of output 21 [2023-11-06 22:56:11,904 INFO L351 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 [2023-11-06 22:56:11,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:56:11,954 INFO L322 Elim1Store]: treesize reduction 40, result has 25.9 percent of original size [2023-11-06 22:56:11,954 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 46 [2023-11-06 22:56:11,964 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-06 22:56:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:56:12,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:16,490 INFO L322 Elim1Store]: treesize reduction 5, result has 99.1 percent of original size [2023-11-06 22:56:16,496 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 4973961 treesize of output 4955806