./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 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/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_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c4f9d381010c40c0aeec814019363f065d1b11569cf33ee927950bcd4ef29f20 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:34:05,371 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:34:05,511 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:34:05,519 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:34:05,521 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:34:05,567 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:34:05,568 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:34:05,569 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:34:05,570 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:34:05,575 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:34:05,576 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:34:05,576 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:34:05,577 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:34:05,579 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:34:05,579 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:34:05,579 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:34:05,580 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:34:05,580 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:34:05,581 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:34:05,581 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:34:05,582 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:34:05,582 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:34:05,583 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:34:05,583 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:34:05,583 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:34:05,584 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:34:05,585 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:34:05,585 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:34:05,586 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:34:05,586 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:34:05,587 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:34:05,588 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:34:05,588 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:34:05,588 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:34:05,588 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:34:05,588 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:34:05,589 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:34:05,589 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:34:05,589 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_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c4f9d381010c40c0aeec814019363f065d1b11569cf33ee927950bcd4ef29f20 [2023-11-19 07:34:05,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:34:05,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:34:05,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:34:05,943 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:34:05,944 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:34:05,946 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2023-11-19 07:34:09,134 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:34:09,457 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:34:09,470 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2023-11-19 07:34:09,498 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/data/a633469bb/04ee909efd864f24a2002064444580b8/FLAGb15e76479 [2023-11-19 07:34:09,514 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/data/a633469bb/04ee909efd864f24a2002064444580b8 [2023-11-19 07:34:09,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:34:09,519 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:34:09,520 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:34:09,521 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:34:09,527 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:34:09,527 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:09" (1/1) ... [2023-11-19 07:34:09,529 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d0b7525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:09, skipping insertion in model container [2023-11-19 07:34:09,529 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:09" (1/1) ... [2023-11-19 07:34:09,590 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:34:10,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:34:10,384 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:34:10,444 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:34:10,540 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:34:10,540 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:10 WrapperNode [2023-11-19 07:34:10,540 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:34:10,542 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:34:10,542 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:34:10,542 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:34:10,552 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:10" (1/1) ... [2023-11-19 07:34:10,587 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:10" (1/1) ... [2023-11-19 07:34:10,622 INFO L138 Inliner]: procedures = 370, calls = 30, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 127 [2023-11-19 07:34:10,622 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:34:10,623 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:34:10,623 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:34:10,624 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:34:10,634 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:10" (1/1) ... [2023-11-19 07:34:10,635 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:10" (1/1) ... [2023-11-19 07:34:10,640 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:10" (1/1) ... [2023-11-19 07:34:10,640 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:10" (1/1) ... [2023-11-19 07:34:10,652 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:10" (1/1) ... [2023-11-19 07:34:10,656 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:10" (1/1) ... [2023-11-19 07:34:10,659 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:10" (1/1) ... [2023-11-19 07:34:10,661 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:10" (1/1) ... [2023-11-19 07:34:10,666 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:34:10,667 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:34:10,667 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:34:10,667 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:34:10,681 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:10" (1/1) ... [2023-11-19 07:34:10,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:34:10,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:10,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:34:10,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:34:10,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:34:10,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 07:34:10,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:34:10,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:34:10,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:34:10,775 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:34:10,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:34:10,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:34:10,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 07:34:10,776 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 07:34:10,776 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 07:34:10,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:34:10,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:34:10,778 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:34:11,011 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:34:11,013 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:34:11,454 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:34:11,468 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:34:11,468 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:34:11,473 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:11 BoogieIcfgContainer [2023-11-19 07:34:11,473 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:34:11,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:34:11,481 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:34:11,484 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:34:11,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:34:09" (1/3) ... [2023-11-19 07:34:11,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1684082 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:11, skipping insertion in model container [2023-11-19 07:34:11,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:10" (2/3) ... [2023-11-19 07:34:11,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1684082 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:11, skipping insertion in model container [2023-11-19 07:34:11,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:11" (3/3) ... [2023-11-19 07:34:11,489 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_11-arraylist_nr.i [2023-11-19 07:34:11,508 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:34:11,508 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-19 07:34:11,508 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:34:11,718 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:34:11,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 194 transitions, 392 flow [2023-11-19 07:34:11,877 INFO L124 PetriNetUnfolderBase]: 6/193 cut-off events. [2023-11-19 07:34:11,878 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:34:11,886 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. [2023-11-19 07:34:11,886 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 194 transitions, 392 flow [2023-11-19 07:34:11,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 193 transitions, 389 flow [2023-11-19 07:34:11,901 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:34:11,911 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 193 transitions, 389 flow [2023-11-19 07:34:11,914 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 193 transitions, 389 flow [2023-11-19 07:34:11,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 193 transitions, 389 flow [2023-11-19 07:34:11,960 INFO L124 PetriNetUnfolderBase]: 6/193 cut-off events. [2023-11-19 07:34:11,960 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:34:11,961 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. [2023-11-19 07:34:11,965 INFO L119 LiptonReduction]: Number of co-enabled transitions 3192 [2023-11-19 07:34:37,117 WARN L293 SmtUtils]: Spent 7.45s on a formula simplification. DAG size of input: 179 DAG size of output: 169 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-19 07:34:45,651 INFO L134 LiptonReduction]: Checked pairs total: 10845 [2023-11-19 07:34:45,651 INFO L136 LiptonReduction]: Total number of compositions: 224 [2023-11-19 07:34:45,685 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:34:45,693 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;@68d39365, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:34:45,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-19 07:34:45,700 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:34:45,700 INFO L124 PetriNetUnfolderBase]: 2/5 cut-off events. [2023-11-19 07:34:45,700 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:34:45,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:45,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:34:45,702 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)] === [2023-11-19 07:34:45,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:45,707 INFO L85 PathProgramCache]: Analyzing trace with hash 705918, now seen corresponding path program 1 times [2023-11-19 07:34:45,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:45,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409681691] [2023-11-19 07:34:45,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:45,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:46,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:46,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409681691] [2023-11-19 07:34:46,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409681691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:46,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:46,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:34:46,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026532688] [2023-11-19 07:34:46,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:46,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:46,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:46,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:46,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:46,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 418 [2023-11-19 07:34:46,104 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) [2023-11-19 07:34:46,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:46,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 418 [2023-11-19 07:34:46,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:46,363 INFO L124 PetriNetUnfolderBase]: 130/334 cut-off events. [2023-11-19 07:34:46,363 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:34:46,364 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. [2023-11-19 07:34:46,368 INFO L140 encePairwiseOnDemand]: 397/418 looper letters, 33 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-11-19 07:34:46,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 163 flow [2023-11-19 07:34:46,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:34:46,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:34:46,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 603 transitions. [2023-11-19 07:34:46,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48086124401913877 [2023-11-19 07:34:46,391 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 603 transitions. [2023-11-19 07:34:46,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 603 transitions. [2023-11-19 07:34:46,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:46,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 603 transitions. [2023-11-19 07:34:46,402 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) [2023-11-19 07:34:46,410 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) [2023-11-19 07:34:46,412 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) [2023-11-19 07:34:46,415 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 127 flow. Second operand 3 states and 603 transitions. [2023-11-19 07:34:46,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 163 flow [2023-11-19 07:34:46,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 162 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:34:46,421 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 102 flow [2023-11-19 07:34:46,423 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} [2023-11-19 07:34:46,427 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -16 predicate places. [2023-11-19 07:34:46,428 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 102 flow [2023-11-19 07:34:46,428 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) [2023-11-19 07:34:46,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:46,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:34:46,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:34:46,430 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)] === [2023-11-19 07:34:46,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:46,430 INFO L85 PathProgramCache]: Analyzing trace with hash 21832542, now seen corresponding path program 1 times [2023-11-19 07:34:46,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:46,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021986537] [2023-11-19 07:34:46,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:46,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:46,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:46,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021986537] [2023-11-19 07:34:46,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021986537] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:46,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975731781] [2023-11-19 07:34:46,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:46,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:46,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:46,531 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:46,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:34:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:46,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:34:46,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:34:46,686 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:46,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975731781] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:46,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:34:46,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-11-19 07:34:46,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774661914] [2023-11-19 07:34:46,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:46,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:46,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:46,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:46,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:34:46,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 418 [2023-11-19 07:34:46,751 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) [2023-11-19 07:34:46,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:46,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 418 [2023-11-19 07:34:46,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:47,007 INFO L124 PetriNetUnfolderBase]: 130/337 cut-off events. [2023-11-19 07:34:47,007 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:34:47,008 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. [2023-11-19 07:34:47,011 INFO L140 encePairwiseOnDemand]: 413/418 looper letters, 36 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-11-19 07:34:47,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 184 flow [2023-11-19 07:34:47,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:34:47,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:34:47,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 589 transitions. [2023-11-19 07:34:47,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2023-11-19 07:34:47,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 589 transitions. [2023-11-19 07:34:47,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 589 transitions. [2023-11-19 07:34:47,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:47,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 589 transitions. [2023-11-19 07:34:47,026 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) [2023-11-19 07:34:47,029 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) [2023-11-19 07:34:47,031 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) [2023-11-19 07:34:47,031 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 102 flow. Second operand 3 states and 589 transitions. [2023-11-19 07:34:47,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 184 flow [2023-11-19 07:34:47,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 48 transitions, 180 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:34:47,035 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 114 flow [2023-11-19 07:34:47,036 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} [2023-11-19 07:34:47,038 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -14 predicate places. [2023-11-19 07:34:47,038 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 114 flow [2023-11-19 07:34:47,039 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) [2023-11-19 07:34:47,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:47,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:34:47,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:47,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:47,261 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)] === [2023-11-19 07:34:47,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:47,261 INFO L85 PathProgramCache]: Analyzing trace with hash 21832577, now seen corresponding path program 1 times [2023-11-19 07:34:47,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:47,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872168046] [2023-11-19 07:34:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:47,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:47,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:47,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872168046] [2023-11-19 07:34:47,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872168046] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:47,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377352065] [2023-11-19 07:34:47,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:47,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:47,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:47,449 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:47,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:34:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:47,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:34:47,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:47,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:47,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377352065] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:34:47,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:34:47,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 07:34:47,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601751999] [2023-11-19 07:34:47,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:47,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:34:47,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:47,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:34:47,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:34:47,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 418 [2023-11-19 07:34:47,677 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) [2023-11-19 07:34:47,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:47,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 418 [2023-11-19 07:34:47,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:48,014 INFO L124 PetriNetUnfolderBase]: 130/340 cut-off events. [2023-11-19 07:34:48,014 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:34:48,015 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. [2023-11-19 07:34:48,018 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 34 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-11-19 07:34:48,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 204 flow [2023-11-19 07:34:48,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:34:48,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:34:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1133 transitions. [2023-11-19 07:34:48,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4517543859649123 [2023-11-19 07:34:48,024 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1133 transitions. [2023-11-19 07:34:48,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1133 transitions. [2023-11-19 07:34:48,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:48,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1133 transitions. [2023-11-19 07:34:48,030 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) [2023-11-19 07:34:48,037 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) [2023-11-19 07:34:48,039 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) [2023-11-19 07:34:48,040 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 114 flow. Second operand 6 states and 1133 transitions. [2023-11-19 07:34:48,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 204 flow [2023-11-19 07:34:48,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 49 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:34:48,043 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 148 flow [2023-11-19 07:34:48,043 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} [2023-11-19 07:34:48,044 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -7 predicate places. [2023-11-19 07:34:48,044 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 148 flow [2023-11-19 07:34:48,046 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) [2023-11-19 07:34:48,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:48,046 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-19 07:34:48,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:48,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:48,269 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)] === [2023-11-19 07:34:48,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:48,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1822637473, now seen corresponding path program 2 times [2023-11-19 07:34:48,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:48,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698250593] [2023-11-19 07:34:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:48,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:48,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:48,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698250593] [2023-11-19 07:34:48,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698250593] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:48,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643116006] [2023-11-19 07:34:48,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:34:48,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:48,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:48,438 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:48,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:34:48,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:34:48,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:34:48,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:34:48,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:48,681 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-19 07:34:48,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-19 07:34:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:34:48,694 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:48,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643116006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:48,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:34:48,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-11-19 07:34:48,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725346223] [2023-11-19 07:34:48,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:48,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:48,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:48,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:48,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:34:48,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-11-19 07:34:48,835 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) [2023-11-19 07:34:48,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:48,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-11-19 07:34:48,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:49,052 INFO L124 PetriNetUnfolderBase]: 131/346 cut-off events. [2023-11-19 07:34:49,058 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:34:49,060 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. [2023-11-19 07:34:49,063 INFO L140 encePairwiseOnDemand]: 413/418 looper letters, 53 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-11-19 07:34:49,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 286 flow [2023-11-19 07:34:49,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:34:49,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:34:49,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-11-19 07:34:49,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4824561403508772 [2023-11-19 07:34:49,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-11-19 07:34:49,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-11-19 07:34:49,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:49,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-11-19 07:34:49,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:49,085 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) [2023-11-19 07:34:49,086 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) [2023-11-19 07:34:49,086 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 148 flow. Second operand 3 states and 605 transitions. [2023-11-19 07:34:49,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 286 flow [2023-11-19 07:34:49,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 272 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 07:34:49,091 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 138 flow [2023-11-19 07:34:49,091 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} [2023-11-19 07:34:49,093 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -7 predicate places. [2023-11-19 07:34:49,094 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 138 flow [2023-11-19 07:34:49,095 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) [2023-11-19 07:34:49,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:49,095 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-19 07:34:49,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:49,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:49,308 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)] === [2023-11-19 07:34:49,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:49,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1822637469, now seen corresponding path program 1 times [2023-11-19 07:34:49,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:49,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162582560] [2023-11-19 07:34:49,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:49,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:49,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:49,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162582560] [2023-11-19 07:34:49,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162582560] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:49,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851176687] [2023-11-19 07:34:49,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:49,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:49,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:49,475 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:49,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:34:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:49,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:34:49,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:49,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:49,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851176687] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:34:49,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:34:49,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-19 07:34:49,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273712380] [2023-11-19 07:34:49,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:49,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:34:49,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:49,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:34:49,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:34:49,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 418 [2023-11-19 07:34:49,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 138 flow. Second operand has 13 states, 13 states have (on average 183.15384615384616) internal successors, (2381), 13 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:49,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:49,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 418 [2023-11-19 07:34:49,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:50,285 INFO L124 PetriNetUnfolderBase]: 130/338 cut-off events. [2023-11-19 07:34:50,286 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-19 07:34:50,287 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. [2023-11-19 07:34:50,290 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 33 selfloop transitions, 11 changer transitions 0/53 dead transitions. [2023-11-19 07:34:50,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 53 transitions, 262 flow [2023-11-19 07:34:50,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:34:50,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:34:50,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2233 transitions. [2023-11-19 07:34:50,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451754385964912 [2023-11-19 07:34:50,299 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2233 transitions. [2023-11-19 07:34:50,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2233 transitions. [2023-11-19 07:34:50,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:50,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2233 transitions. [2023-11-19 07:34:50,309 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) [2023-11-19 07:34:50,321 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) [2023-11-19 07:34:50,324 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) [2023-11-19 07:34:50,324 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 138 flow. Second operand 12 states and 2233 transitions. [2023-11-19 07:34:50,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 53 transitions, 262 flow [2023-11-19 07:34:50,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 53 transitions, 258 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:34:50,333 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 218 flow [2023-11-19 07:34:50,333 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} [2023-11-19 07:34:50,335 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 8 predicate places. [2023-11-19 07:34:50,336 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 218 flow [2023-11-19 07:34:50,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 183.15384615384616) internal successors, (2381), 13 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:50,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:50,338 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-19 07:34:50,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:50,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:50,556 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)] === [2023-11-19 07:34:50,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:50,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1460629917, now seen corresponding path program 2 times [2023-11-19 07:34:50,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:50,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3417685] [2023-11-19 07:34:50,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:50,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 07:34:50,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:50,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3417685] [2023-11-19 07:34:50,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3417685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:50,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:50,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:34:50,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853613969] [2023-11-19 07:34:50,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:50,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:34:50,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:50,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:34:50,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:34:51,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 418 [2023-11-19 07:34:51,349 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) [2023-11-19 07:34:51,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:51,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 418 [2023-11-19 07:34:51,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:51,646 INFO L124 PetriNetUnfolderBase]: 147/387 cut-off events. [2023-11-19 07:34:51,646 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-19 07:34:51,648 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. [2023-11-19 07:34:51,651 INFO L140 encePairwiseOnDemand]: 413/418 looper letters, 58 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-11-19 07:34:51,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 374 flow [2023-11-19 07:34:51,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:34:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:34:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 721 transitions. [2023-11-19 07:34:51,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312200956937799 [2023-11-19 07:34:51,656 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 721 transitions. [2023-11-19 07:34:51,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 721 transitions. [2023-11-19 07:34:51,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:51,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 721 transitions. [2023-11-19 07:34:51,659 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) [2023-11-19 07:34:51,664 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) [2023-11-19 07:34:51,665 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) [2023-11-19 07:34:51,665 INFO L175 Difference]: Start difference. First operand has 72 places, 53 transitions, 218 flow. Second operand 4 states and 721 transitions. [2023-11-19 07:34:51,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 374 flow [2023-11-19 07:34:51,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 324 flow, removed 20 selfloop flow, removed 5 redundant places. [2023-11-19 07:34:51,670 INFO L231 Difference]: Finished difference. Result has 71 places, 53 transitions, 180 flow [2023-11-19 07:34:51,671 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} [2023-11-19 07:34:51,672 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 7 predicate places. [2023-11-19 07:34:51,672 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 53 transitions, 180 flow [2023-11-19 07:34:51,673 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) [2023-11-19 07:34:51,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:51,673 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-11-19 07:34:51,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:34:51,673 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)] === [2023-11-19 07:34:51,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:51,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1965111355, now seen corresponding path program 1 times [2023-11-19 07:34:51,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:51,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231036437] [2023-11-19 07:34:51,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:51,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 07:34:51,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:51,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231036437] [2023-11-19 07:34:51,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231036437] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:51,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318370814] [2023-11-19 07:34:51,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:51,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:51,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:51,789 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:51,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:34:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:51,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:34:51,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 07:34:51,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 07:34:51,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318370814] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:34:51,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:34:51,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 07:34:51,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152885426] [2023-11-19 07:34:51,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:51,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:34:51,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:51,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:34:51,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:34:52,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 418 [2023-11-19 07:34:52,035 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) [2023-11-19 07:34:52,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:52,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 418 [2023-11-19 07:34:52,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:52,474 INFO L124 PetriNetUnfolderBase]: 131/343 cut-off events. [2023-11-19 07:34:52,474 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-11-19 07:34:52,475 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. [2023-11-19 07:34:52,477 INFO L140 encePairwiseOnDemand]: 412/418 looper letters, 44 selfloop transitions, 6 changer transitions 0/59 dead transitions. [2023-11-19 07:34:52,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 59 transitions, 304 flow [2023-11-19 07:34:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:34:52,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:34:52,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1141 transitions. [2023-11-19 07:34:52,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45494417862838915 [2023-11-19 07:34:52,483 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1141 transitions. [2023-11-19 07:34:52,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1141 transitions. [2023-11-19 07:34:52,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:52,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1141 transitions. [2023-11-19 07:34:52,488 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) [2023-11-19 07:34:52,493 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) [2023-11-19 07:34:52,494 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) [2023-11-19 07:34:52,495 INFO L175 Difference]: Start difference. First operand has 71 places, 53 transitions, 180 flow. Second operand 6 states and 1141 transitions. [2023-11-19 07:34:52,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 59 transitions, 304 flow [2023-11-19 07:34:52,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 59 transitions, 296 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:34:52,498 INFO L231 Difference]: Finished difference. Result has 77 places, 57 transitions, 232 flow [2023-11-19 07:34:52,499 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} [2023-11-19 07:34:52,499 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 13 predicate places. [2023-11-19 07:34:52,500 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 57 transitions, 232 flow [2023-11-19 07:34:52,501 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) [2023-11-19 07:34:52,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:52,501 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-11-19 07:34:52,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:52,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:34:52,716 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)] === [2023-11-19 07:34:52,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:52,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1965111324, now seen corresponding path program 1 times [2023-11-19 07:34:52,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:52,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3824246] [2023-11-19 07:34:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:52,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 07:34:53,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:53,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3824246] [2023-11-19 07:34:53,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3824246] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:53,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591651902] [2023-11-19 07:34:53,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:53,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:53,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:53,322 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:53,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9ad773-5dec-4de3-be16-b93016b8c903/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:34:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:53,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-19 07:34:53,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:53,671 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-19 07:34:53,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-19 07:34:53,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 07:34:53,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:53,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 07:34:53,775 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-19 07:34:53,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 16 [2023-11-19 07:34:53,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:53,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:53,799 INFO L378 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 [2023-11-19 07:34:53,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:53,828 INFO L349 Elim1Store]: treesize reduction 55, result has 1.8 percent of original size [2023-11-19 07:34:53,829 INFO L378 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 [2023-11-19 07:34:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 07:34:53,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 07:34:55,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591651902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:34:55,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:34:55,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-11-19 07:34:55,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19631329] [2023-11-19 07:34:55,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:55,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:34:55,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:55,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:34:55,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:35:00,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]