./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/clever.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 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_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/clever.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ --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 f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:35:57,563 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:35:57,651 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-23 22:35:57,657 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:35:57,658 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:35:57,683 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:35:57,684 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:35:57,685 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:35:57,685 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:35:57,686 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:35:57,687 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:35:57,687 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:35:57,688 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:35:57,689 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:35:57,689 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:35:57,690 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:35:57,691 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:35:57,691 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:35:57,692 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 22:35:57,692 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 22:35:57,693 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 22:35:57,694 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:35:57,694 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 22:35:57,695 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:35:57,695 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:35:57,696 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:35:57,697 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:35:57,697 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:35:57,698 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:35:57,698 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:35:57,699 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:35:57,699 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:35:57,703 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:35:57,704 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:35:57,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:35:57,705 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:35:57,705 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:35:57,706 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:35:57,720 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:35:57,720 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_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d [2023-11-23 22:35:58,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:35:58,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:35:58,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:35:58,076 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:35:58,077 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:35:58,078 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/weaver/clever.wvr.c [2023-11-23 22:36:01,278 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:36:01,564 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:36:01,565 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/sv-benchmarks/c/weaver/clever.wvr.c [2023-11-23 22:36:01,578 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/data/ef62ee7b0/85c6fadfa5cc49728972e87d078799b3/FLAGc4caa891c [2023-11-23 22:36:01,601 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/data/ef62ee7b0/85c6fadfa5cc49728972e87d078799b3 [2023-11-23 22:36:01,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:36:01,611 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:36:01,615 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:36:01,615 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:36:01,621 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:36:01,627 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:36:01" (1/1) ... [2023-11-23 22:36:01,643 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@141bc8fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:01, skipping insertion in model container [2023-11-23 22:36:01,643 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:36:01" (1/1) ... [2023-11-23 22:36:01,672 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:36:01,860 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:36:01,879 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:36:01,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:36:01,918 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:36:01,919 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:01 WrapperNode [2023-11-23 22:36:01,919 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:36:01,920 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:36:01,920 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:36:01,921 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:36:01,929 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:01" (1/1) ... [2023-11-23 22:36:01,939 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:01" (1/1) ... [2023-11-23 22:36:01,972 INFO L138 Inliner]: procedures = 19, calls = 22, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 86 [2023-11-23 22:36:01,973 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:36:01,974 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:36:01,974 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:36:01,974 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:36:01,985 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:01" (1/1) ... [2023-11-23 22:36:01,986 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:01" (1/1) ... [2023-11-23 22:36:01,989 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:01" (1/1) ... [2023-11-23 22:36:01,989 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:01" (1/1) ... [2023-11-23 22:36:01,996 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:01" (1/1) ... [2023-11-23 22:36:02,000 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:01" (1/1) ... [2023-11-23 22:36:02,004 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:01" (1/1) ... [2023-11-23 22:36:02,005 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:01" (1/1) ... [2023-11-23 22:36:02,008 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:36:02,009 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:36:02,009 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:36:02,010 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:36:02,010 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:01" (1/1) ... [2023-11-23 22:36:02,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:36:02,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:36:02,051 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:36:02,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:36:02,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:36:02,116 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 22:36:02,116 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 22:36:02,116 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 22:36:02,116 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 22:36:02,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 22:36:02,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:36:02,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 22:36:02,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:36:02,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:36:02,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 22:36:02,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:36:02,119 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:36:02,276 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:36:02,278 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:36:02,570 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:36:02,895 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:36:02,895 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 22:36:02,896 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:36:02 BoogieIcfgContainer [2023-11-23 22:36:02,896 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:36:02,899 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:36:02,899 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:36:02,903 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:36:02,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:36:01" (1/3) ... [2023-11-23 22:36:02,904 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35cca50a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:36:02, skipping insertion in model container [2023-11-23 22:36:02,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:01" (2/3) ... [2023-11-23 22:36:02,905 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35cca50a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:36:02, skipping insertion in model container [2023-11-23 22:36:02,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:36:02" (3/3) ... [2023-11-23 22:36:02,907 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2023-11-23 22:36:02,928 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:36:02,929 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-23 22:36:02,929 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:36:02,987 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-23 22:36:03,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 35 transitions, 84 flow [2023-11-23 22:36:03,099 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2023-11-23 22:36:03,101 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-23 22:36:03,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 3/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 43 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2023-11-23 22:36:03,113 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 35 transitions, 84 flow [2023-11-23 22:36:03,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 32 transitions, 76 flow [2023-11-23 22:36:03,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:36:03,149 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;@23373046, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:36:03,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-23 22:36:03,153 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:36:03,153 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-23 22:36:03,153 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:36:03,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:36:03,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-23 22:36:03,156 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 22:36:03,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:03,163 INFO L85 PathProgramCache]: Analyzing trace with hash 11151, now seen corresponding path program 1 times [2023-11-23 22:36:03,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:03,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612146014] [2023-11-23 22:36:03,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:03,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:03,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:03,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:03,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612146014] [2023-11-23 22:36:03,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612146014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:36:03,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:36:03,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:36:03,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495908827] [2023-11-23 22:36:03,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:36:03,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:36:03,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:03,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:36:03,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:36:03,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 35 [2023-11-23 22:36:03,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2023-11-23 22:36:03,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:36:03,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 35 [2023-11-23 22:36:03,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:36:03,795 INFO L124 PetriNetUnfolderBase]: 95/177 cut-off events. [2023-11-23 22:36:03,795 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-23 22:36:03,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 177 events. 95/177 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 542 event pairs, 41 based on Foata normal form. 1/108 useless extension candidates. Maximal degree in co-relation 289. Up to 142 conditions per place. [2023-11-23 22:36:03,800 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 15 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-11-23 22:36:03,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 100 flow [2023-11-23 22:36:03,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:36:03,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:36:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2023-11-23 22:36:03,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2023-11-23 22:36:03,816 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 64 transitions. [2023-11-23 22:36:03,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 64 transitions. [2023-11-23 22:36:03,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:36:03,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 64 transitions. [2023-11-23 22:36:03,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-11-23 22:36:03,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-23 22:36:03,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-23 22:36:03,829 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 64 transitions. [2023-11-23 22:36:03,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 100 flow [2023-11-23 22:36:03,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 92 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-23 22:36:03,835 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 62 flow [2023-11-23 22:36:03,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2023-11-23 22:36:03,842 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -6 predicate places. [2023-11-23 22:36:03,842 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 62 flow [2023-11-23 22:36:03,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2023-11-23 22:36:03,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:36:03,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-23 22:36:03,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:36:03,844 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 22:36:03,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:03,845 INFO L85 PathProgramCache]: Analyzing trace with hash 11152, now seen corresponding path program 1 times [2023-11-23 22:36:03,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:03,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281028978] [2023-11-23 22:36:03,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:03,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:04,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:04,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281028978] [2023-11-23 22:36:04,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281028978] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:36:04,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:36:04,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:36:04,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620216735] [2023-11-23 22:36:04,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:36:04,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:36:04,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:04,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:36:04,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:36:04,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 35 [2023-11-23 22:36:04,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2023-11-23 22:36:04,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:36:04,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 35 [2023-11-23 22:36:04,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:36:04,224 INFO L124 PetriNetUnfolderBase]: 61/126 cut-off events. [2023-11-23 22:36:04,225 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-23 22:36:04,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 126 events. 61/126 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 350 event pairs, 24 based on Foata normal form. 13/88 useless extension candidates. Maximal degree in co-relation 224. Up to 95 conditions per place. [2023-11-23 22:36:04,229 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 13 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-11-23 22:36:04,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 26 transitions, 86 flow [2023-11-23 22:36:04,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:36:04,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:36:04,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2023-11-23 22:36:04,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2023-11-23 22:36:04,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 67 transitions. [2023-11-23 22:36:04,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 67 transitions. [2023-11-23 22:36:04,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:36:04,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 67 transitions. [2023-11-23 22:36:04,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2023-11-23 22:36:04,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-23 22:36:04,241 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-23 22:36:04,242 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 62 flow. Second operand 3 states and 67 transitions. [2023-11-23 22:36:04,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 26 transitions, 86 flow [2023-11-23 22:36:04,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 85 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:36:04,247 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 59 flow [2023-11-23 22:36:04,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2023-11-23 22:36:04,248 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -7 predicate places. [2023-11-23 22:36:04,248 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 59 flow [2023-11-23 22:36:04,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2023-11-23 22:36:04,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:36:04,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 22:36:04,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:36:04,250 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 22:36:04,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:04,252 INFO L85 PathProgramCache]: Analyzing trace with hash 332495519, now seen corresponding path program 1 times [2023-11-23 22:36:04,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:04,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607694032] [2023-11-23 22:36:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:04,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:04,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:04,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607694032] [2023-11-23 22:36:04,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607694032] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:36:04,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:36:04,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:36:04,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121958128] [2023-11-23 22:36:04,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:36:04,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:36:04,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:04,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:36:04,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:36:04,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 35 [2023-11-23 22:36:04,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-11-23 22:36:04,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:36:04,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 35 [2023-11-23 22:36:04,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:36:04,414 INFO L124 PetriNetUnfolderBase]: 71/133 cut-off events. [2023-11-23 22:36:04,414 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 22:36:04,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 133 events. 71/133 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 370 event pairs, 29 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 248. Up to 112 conditions per place. [2023-11-23 22:36:04,416 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 15 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-11-23 22:36:04,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 87 flow [2023-11-23 22:36:04,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:36:04,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:36:04,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2023-11-23 22:36:04,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2023-11-23 22:36:04,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 63 transitions. [2023-11-23 22:36:04,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 63 transitions. [2023-11-23 22:36:04,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:36:04,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 63 transitions. [2023-11-23 22:36:04,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-23 22:36:04,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-23 22:36:04,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-23 22:36:04,421 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 59 flow. Second operand 3 states and 63 transitions. [2023-11-23 22:36:04,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 87 flow [2023-11-23 22:36:04,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 86 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:36:04,423 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 56 flow [2023-11-23 22:36:04,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-11-23 22:36:04,424 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -8 predicate places. [2023-11-23 22:36:04,425 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 56 flow [2023-11-23 22:36:04,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-11-23 22:36:04,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:36:04,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 22:36:04,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:36:04,426 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 22:36:04,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:04,426 INFO L85 PathProgramCache]: Analyzing trace with hash 332495520, now seen corresponding path program 1 times [2023-11-23 22:36:04,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:04,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653218127] [2023-11-23 22:36:04,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:04,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:04,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:04,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653218127] [2023-11-23 22:36:04,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653218127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:36:04,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:36:04,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:36:04,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218955254] [2023-11-23 22:36:04,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:36:04,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:36:04,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:04,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:36:04,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:36:04,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 35 [2023-11-23 22:36:04,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2023-11-23 22:36:04,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:36:04,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 35 [2023-11-23 22:36:04,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:36:04,560 INFO L124 PetriNetUnfolderBase]: 61/116 cut-off events. [2023-11-23 22:36:04,560 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-23 22:36:04,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 116 events. 61/116 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 308 event pairs, 24 based on Foata normal form. 7/82 useless extension candidates. Maximal degree in co-relation 214. Up to 95 conditions per place. [2023-11-23 22:36:04,562 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 13 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-11-23 22:36:04,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 22 transitions, 80 flow [2023-11-23 22:36:04,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:36:04,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:36:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2023-11-23 22:36:04,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2023-11-23 22:36:04,564 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 67 transitions. [2023-11-23 22:36:04,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 67 transitions. [2023-11-23 22:36:04,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:36:04,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 67 transitions. [2023-11-23 22:36:04,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2023-11-23 22:36:04,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-23 22:36:04,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-23 22:36:04,567 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 56 flow. Second operand 3 states and 67 transitions. [2023-11-23 22:36:04,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 22 transitions, 80 flow [2023-11-23 22:36:04,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 22 transitions, 79 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:36:04,568 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 53 flow [2023-11-23 22:36:04,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-11-23 22:36:04,569 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -9 predicate places. [2023-11-23 22:36:04,570 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 53 flow [2023-11-23 22:36:04,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2023-11-23 22:36:04,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:36:04,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:36:04,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:36:04,571 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 22:36:04,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:04,572 INFO L85 PathProgramCache]: Analyzing trace with hash 828415284, now seen corresponding path program 1 times [2023-11-23 22:36:04,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:04,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751841173] [2023-11-23 22:36:04,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:04,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:04,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:04,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751841173] [2023-11-23 22:36:04,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751841173] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:36:04,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:36:04,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:36:04,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204933173] [2023-11-23 22:36:04,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:36:04,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:36:04,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:04,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:36:04,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:36:04,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-23 22:36:04,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2023-11-23 22:36:04,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:36:04,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-23 22:36:04,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:36:04,842 INFO L124 PetriNetUnfolderBase]: 106/189 cut-off events. [2023-11-23 22:36:04,843 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-23 22:36:04,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 189 events. 106/189 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 613 event pairs, 19 based on Foata normal form. 1/123 useless extension candidates. Maximal degree in co-relation 361. Up to 110 conditions per place. [2023-11-23 22:36:04,851 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 21 selfloop transitions, 3 changer transitions 1/33 dead transitions. [2023-11-23 22:36:04,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 33 transitions, 128 flow [2023-11-23 22:36:04,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:36:04,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:36:04,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2023-11-23 22:36:04,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7904761904761904 [2023-11-23 22:36:04,856 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 83 transitions. [2023-11-23 22:36:04,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 83 transitions. [2023-11-23 22:36:04,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:36:04,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 83 transitions. [2023-11-23 22:36:04,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2023-11-23 22:36:04,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-23 22:36:04,865 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-23 22:36:04,865 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 53 flow. Second operand 3 states and 83 transitions. [2023-11-23 22:36:04,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 33 transitions, 128 flow [2023-11-23 22:36:04,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:36:04,867 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 71 flow [2023-11-23 22:36:04,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-11-23 22:36:04,871 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -7 predicate places. [2023-11-23 22:36:04,871 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 71 flow [2023-11-23 22:36:04,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2023-11-23 22:36:04,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:36:04,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:36:04,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:36:04,872 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 22:36:04,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:04,874 INFO L85 PathProgramCache]: Analyzing trace with hash -401151936, now seen corresponding path program 1 times [2023-11-23 22:36:04,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:04,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357157559] [2023-11-23 22:36:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:04,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:04,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:04,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357157559] [2023-11-23 22:36:04,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357157559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:36:04,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:36:04,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:36:04,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997900033] [2023-11-23 22:36:04,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:36:04,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:36:04,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:04,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:36:04,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:36:04,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-23 22:36:04,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2023-11-23 22:36:04,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:36:04,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-23 22:36:04,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:36:05,102 INFO L124 PetriNetUnfolderBase]: 145/264 cut-off events. [2023-11-23 22:36:05,102 INFO L125 PetriNetUnfolderBase]: For 56/62 co-relation queries the response was YES. [2023-11-23 22:36:05,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 264 events. 145/264 cut-off events. For 56/62 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 954 event pairs, 12 based on Foata normal form. 9/243 useless extension candidates. Maximal degree in co-relation 594. Up to 96 conditions per place. [2023-11-23 22:36:05,105 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 37 selfloop transitions, 7 changer transitions 2/54 dead transitions. [2023-11-23 22:36:05,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 54 transitions, 250 flow [2023-11-23 22:36:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:36:05,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:36:05,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2023-11-23 22:36:05,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7771428571428571 [2023-11-23 22:36:05,109 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 136 transitions. [2023-11-23 22:36:05,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 136 transitions. [2023-11-23 22:36:05,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:36:05,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 136 transitions. [2023-11-23 22:36:05,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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) [2023-11-23 22:36:05,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 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) [2023-11-23 22:36:05,113 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 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) [2023-11-23 22:36:05,114 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 71 flow. Second operand 5 states and 136 transitions. [2023-11-23 22:36:05,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 54 transitions, 250 flow [2023-11-23 22:36:05,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 54 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:36:05,117 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 119 flow [2023-11-23 22:36:05,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-11-23 22:36:05,120 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2023-11-23 22:36:05,121 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 119 flow [2023-11-23 22:36:05,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2023-11-23 22:36:05,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:36:05,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:36:05,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 22:36:05,122 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 22:36:05,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:05,122 INFO L85 PathProgramCache]: Analyzing trace with hash -293513818, now seen corresponding path program 2 times [2023-11-23 22:36:05,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:05,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119446955] [2023-11-23 22:36:05,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:05,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:05,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:05,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119446955] [2023-11-23 22:36:05,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119446955] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:36:05,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:36:05,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:36:05,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704911737] [2023-11-23 22:36:05,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:36:05,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:36:05,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:05,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:36:05,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:36:05,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-23 22:36:05,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2023-11-23 22:36:05,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:36:05,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-23 22:36:05,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:36:05,344 INFO L124 PetriNetUnfolderBase]: 146/259 cut-off events. [2023-11-23 22:36:05,345 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2023-11-23 22:36:05,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 772 conditions, 259 events. 146/259 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 884 event pairs, 14 based on Foata normal form. 4/258 useless extension candidates. Maximal degree in co-relation 757. Up to 103 conditions per place. [2023-11-23 22:36:05,349 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 31 selfloop transitions, 11 changer transitions 5/55 dead transitions. [2023-11-23 22:36:05,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 313 flow [2023-11-23 22:36:05,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:36:05,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:36:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2023-11-23 22:36:05,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7542857142857143 [2023-11-23 22:36:05,352 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 132 transitions. [2023-11-23 22:36:05,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 132 transitions. [2023-11-23 22:36:05,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:36:05,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 132 transitions. [2023-11-23 22:36:05,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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) [2023-11-23 22:36:05,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 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) [2023-11-23 22:36:05,355 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 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) [2023-11-23 22:36:05,355 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 119 flow. Second operand 5 states and 132 transitions. [2023-11-23 22:36:05,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 313 flow [2023-11-23 22:36:05,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 313 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 22:36:05,360 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 184 flow [2023-11-23 22:36:05,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2023-11-23 22:36:05,363 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2023-11-23 22:36:05,364 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 184 flow [2023-11-23 22:36:05,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2023-11-23 22:36:05,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:36:05,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:36:05,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 22:36:05,365 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 22:36:05,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:05,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1357748550, now seen corresponding path program 1 times [2023-11-23 22:36:05,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:05,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021968036] [2023-11-23 22:36:05,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:05,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:36:05,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:05,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021968036] [2023-11-23 22:36:05,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021968036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:36:05,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107808661] [2023-11-23 22:36:05,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:05,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:05,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:36:05,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:36:05,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:36:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:05,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:36:05,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:36:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:36:05,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:36:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:36:05,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107808661] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:36:05,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:36:05,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-23 22:36:05,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733138762] [2023-11-23 22:36:05,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:36:05,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:36:05,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:05,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:36:05,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:36:05,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-23 22:36:05,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:36:05,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:36:05,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-23 22:36:05,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:36:05,927 INFO L124 PetriNetUnfolderBase]: 127/237 cut-off events. [2023-11-23 22:36:05,927 INFO L125 PetriNetUnfolderBase]: For 333/333 co-relation queries the response was YES. [2023-11-23 22:36:05,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 859 conditions, 237 events. 127/237 cut-off events. For 333/333 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 777 event pairs, 2 based on Foata normal form. 18/252 useless extension candidates. Maximal degree in co-relation 839. Up to 91 conditions per place. [2023-11-23 22:36:05,932 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 41 selfloop transitions, 9 changer transitions 3/61 dead transitions. [2023-11-23 22:36:05,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 423 flow [2023-11-23 22:36:05,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:36:05,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:36:05,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2023-11-23 22:36:05,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7714285714285715 [2023-11-23 22:36:05,934 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 135 transitions. [2023-11-23 22:36:05,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 135 transitions. [2023-11-23 22:36:05,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:36:05,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 135 transitions. [2023-11-23 22:36:05,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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) [2023-11-23 22:36:05,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 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) [2023-11-23 22:36:05,936 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 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) [2023-11-23 22:36:05,936 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 184 flow. Second operand 5 states and 135 transitions. [2023-11-23 22:36:05,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 423 flow [2023-11-23 22:36:05,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 417 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-23 22:36:05,946 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 256 flow [2023-11-23 22:36:05,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=256, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2023-11-23 22:36:05,949 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 12 predicate places. [2023-11-23 22:36:05,949 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 256 flow [2023-11-23 22:36:05,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:36:05,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:36:05,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:36:05,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:36:06,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:06,172 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 22:36:06,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:06,173 INFO L85 PathProgramCache]: Analyzing trace with hash -595033951, now seen corresponding path program 1 times [2023-11-23 22:36:06,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:06,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032394667] [2023-11-23 22:36:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:06,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:06,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:06,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032394667] [2023-11-23 22:36:06,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032394667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:36:06,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064962739] [2023-11-23 22:36:06,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:06,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:06,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:36:06,652 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:36:06,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:36:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:06,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:36:06,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:36:07,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:07,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:36:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:07,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064962739] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:36:07,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:36:07,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-23 22:36:07,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022620863] [2023-11-23 22:36:07,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:36:07,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 22:36:07,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:07,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 22:36:07,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:36:07,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-23 22:36:07,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 256 flow. Second operand has 13 states, 13 states have (on average 21.76923076923077) internal successors, (283), 13 states have internal predecessors, (283), 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) [2023-11-23 22:36:07,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:36:07,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-23 22:36:07,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:36:07,759 INFO L124 PetriNetUnfolderBase]: 261/475 cut-off events. [2023-11-23 22:36:07,759 INFO L125 PetriNetUnfolderBase]: For 786/787 co-relation queries the response was YES. [2023-11-23 22:36:07,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1865 conditions, 475 events. 261/475 cut-off events. For 786/787 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1908 event pairs, 10 based on Foata normal form. 2/474 useless extension candidates. Maximal degree in co-relation 1841. Up to 188 conditions per place. [2023-11-23 22:36:07,766 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 74 selfloop transitions, 23 changer transitions 7/112 dead transitions. [2023-11-23 22:36:07,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 112 transitions, 917 flow [2023-11-23 22:36:07,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 22:36:07,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-23 22:36:07,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2023-11-23 22:36:07,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2023-11-23 22:36:07,769 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 245 transitions. [2023-11-23 22:36:07,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 245 transitions. [2023-11-23 22:36:07,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:36:07,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 245 transitions. [2023-11-23 22:36:07,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 27.22222222222222) internal successors, (245), 9 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:36:07,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 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) [2023-11-23 22:36:07,772 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 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) [2023-11-23 22:36:07,772 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 256 flow. Second operand 9 states and 245 transitions. [2023-11-23 22:36:07,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 112 transitions, 917 flow [2023-11-23 22:36:07,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 112 transitions, 907 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-23 22:36:07,781 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 499 flow [2023-11-23 22:36:07,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=499, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2023-11-23 22:36:07,782 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2023-11-23 22:36:07,782 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 499 flow [2023-11-23 22:36:07,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.76923076923077) internal successors, (283), 13 states have internal predecessors, (283), 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) [2023-11-23 22:36:07,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:36:07,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:36:07,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:36:07,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:07,997 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 22:36:07,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:07,997 INFO L85 PathProgramCache]: Analyzing trace with hash 672409142, now seen corresponding path program 2 times [2023-11-23 22:36:07,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:07,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707933197] [2023-11-23 22:36:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:07,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:36:08,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:08,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707933197] [2023-11-23 22:36:08,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707933197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:36:08,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:36:08,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:36:08,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691703957] [2023-11-23 22:36:08,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:36:08,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:36:08,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:08,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:36:08,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:36:08,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-23 22:36:08,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 499 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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) [2023-11-23 22:36:08,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:36:08,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-23 22:36:08,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:36:08,233 INFO L124 PetriNetUnfolderBase]: 247/456 cut-off events. [2023-11-23 22:36:08,233 INFO L125 PetriNetUnfolderBase]: For 1277/1304 co-relation queries the response was YES. [2023-11-23 22:36:08,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1994 conditions, 456 events. 247/456 cut-off events. For 1277/1304 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1836 event pairs, 33 based on Foata normal form. 7/459 useless extension candidates. Maximal degree in co-relation 1965. Up to 185 conditions per place. [2023-11-23 22:36:08,241 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 57 selfloop transitions, 13 changer transitions 5/83 dead transitions. [2023-11-23 22:36:08,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 83 transitions, 805 flow [2023-11-23 22:36:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:36:08,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:36:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2023-11-23 22:36:08,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7371428571428571 [2023-11-23 22:36:08,243 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 129 transitions. [2023-11-23 22:36:08,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 129 transitions. [2023-11-23 22:36:08,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:36:08,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 129 transitions. [2023-11-23 22:36:08,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 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) [2023-11-23 22:36:08,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 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) [2023-11-23 22:36:08,246 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 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) [2023-11-23 22:36:08,246 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 499 flow. Second operand 5 states and 129 transitions. [2023-11-23 22:36:08,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 83 transitions, 805 flow [2023-11-23 22:36:08,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 83 transitions, 756 flow, removed 23 selfloop flow, removed 1 redundant places. [2023-11-23 22:36:08,258 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 532 flow [2023-11-23 22:36:08,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=532, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2023-11-23 22:36:08,260 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 29 predicate places. [2023-11-23 22:36:08,260 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 532 flow [2023-11-23 22:36:08,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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) [2023-11-23 22:36:08,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:36:08,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:36:08,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 22:36:08,263 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 22:36:08,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:08,264 INFO L85 PathProgramCache]: Analyzing trace with hash 947768309, now seen corresponding path program 2 times [2023-11-23 22:36:08,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:08,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702476363] [2023-11-23 22:36:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:08,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:08,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:08,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702476363] [2023-11-23 22:36:08,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702476363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:36:08,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308529138] [2023-11-23 22:36:08,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:36:08,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:08,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:36:08,708 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:36:08,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:36:08,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:36:08,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:36:08,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:36:08,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:36:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:09,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:36:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:11,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308529138] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:36:11,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:36:11,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-23 22:36:11,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141332359] [2023-11-23 22:36:11,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:36:11,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 22:36:11,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:11,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 22:36:11,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=102, Unknown=1, NotChecked=0, Total=156 [2023-11-23 22:36:11,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-23 22:36:11,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 532 flow. Second operand has 13 states, 13 states have (on average 21.692307692307693) internal successors, (282), 13 states have internal predecessors, (282), 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) [2023-11-23 22:36:11,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:36:11,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-23 22:36:11,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:36:12,538 INFO L124 PetriNetUnfolderBase]: 729/1337 cut-off events. [2023-11-23 22:36:12,539 INFO L125 PetriNetUnfolderBase]: For 4761/4767 co-relation queries the response was YES. [2023-11-23 22:36:12,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5955 conditions, 1337 events. 729/1337 cut-off events. For 4761/4767 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7114 event pairs, 52 based on Foata normal form. 9/1344 useless extension candidates. Maximal degree in co-relation 5922. Up to 333 conditions per place. [2023-11-23 22:36:12,560 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 146 selfloop transitions, 96 changer transitions 12/262 dead transitions. [2023-11-23 22:36:12,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 262 transitions, 2633 flow [2023-11-23 22:36:12,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 22:36:12,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-23 22:36:12,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 470 transitions. [2023-11-23 22:36:12,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7899159663865546 [2023-11-23 22:36:12,563 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 470 transitions. [2023-11-23 22:36:12,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 470 transitions. [2023-11-23 22:36:12,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:36:12,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 470 transitions. [2023-11-23 22:36:12,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 27.647058823529413) internal successors, (470), 17 states have internal predecessors, (470), 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) [2023-11-23 22:36:12,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 35.0) internal successors, (630), 18 states have internal predecessors, (630), 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) [2023-11-23 22:36:12,568 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 35.0) internal successors, (630), 18 states have internal predecessors, (630), 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) [2023-11-23 22:36:12,568 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 532 flow. Second operand 17 states and 470 transitions. [2023-11-23 22:36:12,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 262 transitions, 2633 flow [2023-11-23 22:36:12,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 262 transitions, 2527 flow, removed 41 selfloop flow, removed 1 redundant places. [2023-11-23 22:36:12,595 INFO L231 Difference]: Finished difference. Result has 91 places, 152 transitions, 1771 flow [2023-11-23 22:36:12,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1771, PETRI_PLACES=91, PETRI_TRANSITIONS=152} [2023-11-23 22:36:12,596 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 55 predicate places. [2023-11-23 22:36:12,596 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 152 transitions, 1771 flow [2023-11-23 22:36:12,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.692307692307693) internal successors, (282), 13 states have internal predecessors, (282), 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) [2023-11-23 22:36:12,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:36:12,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:36:12,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:36:12,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 22:36:12,819 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 22:36:12,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:12,819 INFO L85 PathProgramCache]: Analyzing trace with hash 134068039, now seen corresponding path program 3 times [2023-11-23 22:36:12,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:12,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518485400] [2023-11-23 22:36:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:12,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:13,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:13,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518485400] [2023-11-23 22:36:13,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518485400] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:36:13,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359889755] [2023-11-23 22:36:13,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:36:13,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:13,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:36:13,219 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:36:13,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:36:13,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 22:36:13,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:36:13,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:36:13,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:36:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:13,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:36:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:13,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359889755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:36:13,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:36:13,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-23 22:36:13,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879618781] [2023-11-23 22:36:13,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:36:13,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 22:36:13,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:13,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 22:36:13,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:36:13,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-23 22:36:13,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 152 transitions, 1771 flow. Second operand has 13 states, 13 states have (on average 21.692307692307693) internal successors, (282), 13 states have internal predecessors, (282), 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) [2023-11-23 22:36:13,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:36:13,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-23 22:36:13,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:36:15,042 INFO L124 PetriNetUnfolderBase]: 1487/2759 cut-off events. [2023-11-23 22:36:15,042 INFO L125 PetriNetUnfolderBase]: For 13178/13194 co-relation queries the response was YES. [2023-11-23 22:36:15,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14104 conditions, 2759 events. 1487/2759 cut-off events. For 13178/13194 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17279 event pairs, 128 based on Foata normal form. 7/2763 useless extension candidates. Maximal degree in co-relation 14059. Up to 658 conditions per place. [2023-11-23 22:36:15,085 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 189 selfloop transitions, 164 changer transitions 12/373 dead transitions. [2023-11-23 22:36:15,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 373 transitions, 4833 flow [2023-11-23 22:36:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 22:36:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-23 22:36:15,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 301 transitions. [2023-11-23 22:36:15,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7818181818181819 [2023-11-23 22:36:15,088 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 301 transitions. [2023-11-23 22:36:15,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 301 transitions. [2023-11-23 22:36:15,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:36:15,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 301 transitions. [2023-11-23 22:36:15,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 27.363636363636363) internal successors, (301), 11 states have internal predecessors, (301), 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) [2023-11-23 22:36:15,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 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) [2023-11-23 22:36:15,092 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 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) [2023-11-23 22:36:15,092 INFO L175 Difference]: Start difference. First operand has 91 places, 152 transitions, 1771 flow. Second operand 11 states and 301 transitions. [2023-11-23 22:36:15,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 373 transitions, 4833 flow [2023-11-23 22:36:15,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 373 transitions, 4476 flow, removed 175 selfloop flow, removed 2 redundant places. [2023-11-23 22:36:15,177 INFO L231 Difference]: Finished difference. Result has 104 places, 263 transitions, 3577 flow [2023-11-23 22:36:15,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3577, PETRI_PLACES=104, PETRI_TRANSITIONS=263} [2023-11-23 22:36:15,178 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 68 predicate places. [2023-11-23 22:36:15,178 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 263 transitions, 3577 flow [2023-11-23 22:36:15,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.692307692307693) internal successors, (282), 13 states have internal predecessors, (282), 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) [2023-11-23 22:36:15,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:36:15,179 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:36:15,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:36:15,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 22:36:15,401 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 22:36:15,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:15,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1663957072, now seen corresponding path program 1 times [2023-11-23 22:36:15,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:15,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64577416] [2023-11-23 22:36:15,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:15,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:36:15,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:15,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64577416] [2023-11-23 22:36:15,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64577416] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:36:15,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731491197] [2023-11-23 22:36:15,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:15,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:15,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:36:15,513 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:36:15,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:36:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:15,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:36:15,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:36:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:36:15,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:36:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:36:15,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731491197] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:36:15,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:36:15,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-23 22:36:15,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537360944] [2023-11-23 22:36:15,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:36:15,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:36:15,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:15,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:36:15,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:36:15,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-23 22:36:15,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 263 transitions, 3577 flow. Second operand has 10 states, 10 states have (on average 21.7) internal successors, (217), 10 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:36:15,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:36:15,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-23 22:36:15,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:36:17,059 INFO L124 PetriNetUnfolderBase]: 2297/4314 cut-off events. [2023-11-23 22:36:17,060 INFO L125 PetriNetUnfolderBase]: For 27570/27633 co-relation queries the response was YES. [2023-11-23 22:36:17,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23930 conditions, 4314 events. 2297/4314 cut-off events. For 27570/27633 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 30611 event pairs, 37 based on Foata normal form. 94/4405 useless extension candidates. Maximal degree in co-relation 23879. Up to 1209 conditions per place. [2023-11-23 22:36:17,133 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 407 selfloop transitions, 149 changer transitions 2/566 dead transitions. [2023-11-23 22:36:17,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 566 transitions, 8269 flow [2023-11-23 22:36:17,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 22:36:17,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-23 22:36:17,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 310 transitions. [2023-11-23 22:36:17,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7380952380952381 [2023-11-23 22:36:17,137 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 310 transitions. [2023-11-23 22:36:17,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 310 transitions. [2023-11-23 22:36:17,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:36:17,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 310 transitions. [2023-11-23 22:36:17,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 25.833333333333332) internal successors, (310), 12 states have internal predecessors, (310), 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) [2023-11-23 22:36:17,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 35.0) internal successors, (455), 13 states have internal predecessors, (455), 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) [2023-11-23 22:36:17,141 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 35.0) internal successors, (455), 13 states have internal predecessors, (455), 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) [2023-11-23 22:36:17,141 INFO L175 Difference]: Start difference. First operand has 104 places, 263 transitions, 3577 flow. Second operand 12 states and 310 transitions. [2023-11-23 22:36:17,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 566 transitions, 8269 flow [2023-11-23 22:36:17,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 566 transitions, 8101 flow, removed 55 selfloop flow, removed 7 redundant places. [2023-11-23 22:36:17,274 INFO L231 Difference]: Finished difference. Result has 116 places, 359 transitions, 5559 flow [2023-11-23 22:36:17,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3480, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5559, PETRI_PLACES=116, PETRI_TRANSITIONS=359} [2023-11-23 22:36:17,275 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 80 predicate places. [2023-11-23 22:36:17,276 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 359 transitions, 5559 flow [2023-11-23 22:36:17,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.7) internal successors, (217), 10 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:36:17,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:36:17,276 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:36:17,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:36:17,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 22:36:17,491 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 22:36:17,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:17,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1644673449, now seen corresponding path program 2 times [2023-11-23 22:36:17,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:17,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998001347] [2023-11-23 22:36:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:17,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:18,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:18,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998001347] [2023-11-23 22:36:18,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998001347] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:36:18,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782414933] [2023-11-23 22:36:18,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:36:18,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:18,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:36:18,137 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:36:18,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:36:18,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:36:18,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:36:18,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 22:36:18,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:36:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:18,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:36:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:19,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782414933] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:36:19,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:36:19,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-23 22:36:19,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312196663] [2023-11-23 22:36:19,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:36:19,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 22:36:19,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:19,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 22:36:19,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-23 22:36:19,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-23 22:36:19,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 359 transitions, 5559 flow. Second operand has 19 states, 19 states have (on average 21.210526315789473) internal successors, (403), 19 states have internal predecessors, (403), 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) [2023-11-23 22:36:19,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:36:19,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-23 22:36:19,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:36:26,027 INFO L124 PetriNetUnfolderBase]: 4577/8348 cut-off events. [2023-11-23 22:36:26,028 INFO L125 PetriNetUnfolderBase]: For 77563/77672 co-relation queries the response was YES. [2023-11-23 22:36:26,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53016 conditions, 8348 events. 4577/8348 cut-off events. For 77563/77672 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 62711 event pairs, 288 based on Foata normal form. 62/8408 useless extension candidates. Maximal degree in co-relation 52960. Up to 2541 conditions per place. [2023-11-23 22:36:26,187 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 416 selfloop transitions, 700 changer transitions 37/1161 dead transitions. [2023-11-23 22:36:26,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 1161 transitions, 19499 flow [2023-11-23 22:36:26,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-23 22:36:26,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-23 22:36:26,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 898 transitions. [2023-11-23 22:36:26,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7546218487394958 [2023-11-23 22:36:26,193 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 898 transitions. [2023-11-23 22:36:26,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 898 transitions. [2023-11-23 22:36:26,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:36:26,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 898 transitions. [2023-11-23 22:36:26,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 26.41176470588235) internal successors, (898), 34 states have internal predecessors, (898), 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) [2023-11-23 22:36:26,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 35.0) internal successors, (1225), 35 states have internal predecessors, (1225), 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) [2023-11-23 22:36:26,202 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 35.0) internal successors, (1225), 35 states have internal predecessors, (1225), 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) [2023-11-23 22:36:26,203 INFO L175 Difference]: Start difference. First operand has 116 places, 359 transitions, 5559 flow. Second operand 34 states and 898 transitions. [2023-11-23 22:36:26,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 1161 transitions, 19499 flow [2023-11-23 22:36:26,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 1161 transitions, 18420 flow, removed 524 selfloop flow, removed 2 redundant places. [2023-11-23 22:36:26,685 INFO L231 Difference]: Finished difference. Result has 155 places, 911 transitions, 16649 flow [2023-11-23 22:36:26,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5212, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=16649, PETRI_PLACES=155, PETRI_TRANSITIONS=911} [2023-11-23 22:36:26,686 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 119 predicate places. [2023-11-23 22:36:26,686 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 911 transitions, 16649 flow [2023-11-23 22:36:26,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 21.210526315789473) internal successors, (403), 19 states have internal predecessors, (403), 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) [2023-11-23 22:36:26,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:36:26,687 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:36:26,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:36:26,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 22:36:26,888 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 22:36:26,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:26,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1067977199, now seen corresponding path program 3 times [2023-11-23 22:36:26,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:26,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550718807] [2023-11-23 22:36:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:26,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:36:27,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:27,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550718807] [2023-11-23 22:36:27,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550718807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:36:27,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029578797] [2023-11-23 22:36:27,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:36:27,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:27,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:36:27,294 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:36:27,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:36:27,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 22:36:27,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:36:27,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 22:36:27,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:36:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:28,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:36:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:36:28,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029578797] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:36:28,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:36:28,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 14 [2023-11-23 22:36:28,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142506563] [2023-11-23 22:36:28,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:36:28,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 22:36:28,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:28,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 22:36:28,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:36:28,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-23 22:36:28,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 911 transitions, 16649 flow. Second operand has 15 states, 15 states have (on average 21.333333333333332) internal successors, (320), 15 states have internal predecessors, (320), 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) [2023-11-23 22:36:28,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:36:28,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-23 22:36:28,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:36:35,658 INFO L124 PetriNetUnfolderBase]: 6128/11480 cut-off events. [2023-11-23 22:36:35,658 INFO L125 PetriNetUnfolderBase]: For 121159/121236 co-relation queries the response was YES. [2023-11-23 22:36:35,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76507 conditions, 11480 events. 6128/11480 cut-off events. For 121159/121236 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 93655 event pairs, 416 based on Foata normal form. 43/11521 useless extension candidates. Maximal degree in co-relation 76443. Up to 7323 conditions per place. [2023-11-23 22:36:35,859 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 1022 selfloop transitions, 397 changer transitions 19/1446 dead transitions. [2023-11-23 22:36:35,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 1446 transitions, 28234 flow [2023-11-23 22:36:35,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 22:36:35,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-23 22:36:35,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 569 transitions. [2023-11-23 22:36:35,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7741496598639456 [2023-11-23 22:36:35,863 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 569 transitions. [2023-11-23 22:36:35,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 569 transitions. [2023-11-23 22:36:35,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:36:35,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 569 transitions. [2023-11-23 22:36:35,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 27.095238095238095) internal successors, (569), 21 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:36:35,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 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) [2023-11-23 22:36:35,870 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 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) [2023-11-23 22:36:35,870 INFO L175 Difference]: Start difference. First operand has 155 places, 911 transitions, 16649 flow. Second operand 21 states and 569 transitions. [2023-11-23 22:36:35,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 1446 transitions, 28234 flow [2023-11-23 22:36:37,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 1446 transitions, 25696 flow, removed 1244 selfloop flow, removed 5 redundant places. [2023-11-23 22:36:37,721 INFO L231 Difference]: Finished difference. Result has 185 places, 1212 transitions, 22068 flow [2023-11-23 22:36:37,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=14610, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=22068, PETRI_PLACES=185, PETRI_TRANSITIONS=1212} [2023-11-23 22:36:37,722 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 149 predicate places. [2023-11-23 22:36:37,723 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 1212 transitions, 22068 flow [2023-11-23 22:36:37,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 21.333333333333332) internal successors, (320), 15 states have internal predecessors, (320), 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) [2023-11-23 22:36:37,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:36:37,723 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:36:37,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:36:37,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 22:36:37,924 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 22:36:37,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:37,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1969105274, now seen corresponding path program 4 times [2023-11-23 22:36:37,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:37,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555728200] [2023-11-23 22:36:37,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:37,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:36:38,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:38,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555728200] [2023-11-23 22:36:38,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555728200] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:36:38,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325192794] [2023-11-23 22:36:38,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 22:36:38,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:38,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:36:38,084 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:36:38,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:36:38,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 22:36:38,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:36:38,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:36:38,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:36:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:36:38,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:36:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:36:38,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325192794] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:36:38,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:36:38,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-11-23 22:36:38,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750024236] [2023-11-23 22:36:38,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:36:38,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:36:38,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:38,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:36:38,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:36:38,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-23 22:36:38,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 1212 transitions, 22068 flow. Second operand has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 states have internal predecessors, (198), 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) [2023-11-23 22:36:38,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:36:38,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-23 22:36:38,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:36:46,057 INFO L124 PetriNetUnfolderBase]: 7049/13611 cut-off events. [2023-11-23 22:36:46,057 INFO L125 PetriNetUnfolderBase]: For 149530/149690 co-relation queries the response was YES. [2023-11-23 22:36:46,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90447 conditions, 13611 events. 7049/13611 cut-off events. For 149530/149690 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 118421 event pairs, 539 based on Foata normal form. 45/13654 useless extension candidates. Maximal degree in co-relation 90369. Up to 4905 conditions per place. [2023-11-23 22:36:46,418 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 913 selfloop transitions, 931 changer transitions 0/1852 dead transitions. [2023-11-23 22:36:46,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 1852 transitions, 35891 flow [2023-11-23 22:36:46,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 22:36:46,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-23 22:36:46,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 358 transitions. [2023-11-23 22:36:46,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7306122448979592 [2023-11-23 22:36:46,422 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 358 transitions. [2023-11-23 22:36:46,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 358 transitions. [2023-11-23 22:36:46,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:36:46,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 358 transitions. [2023-11-23 22:36:46,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 25.571428571428573) internal successors, (358), 14 states have internal predecessors, (358), 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) [2023-11-23 22:36:46,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 35.0) internal successors, (525), 15 states have internal predecessors, (525), 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) [2023-11-23 22:36:46,429 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 35.0) internal successors, (525), 15 states have internal predecessors, (525), 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) [2023-11-23 22:36:46,430 INFO L175 Difference]: Start difference. First operand has 185 places, 1212 transitions, 22068 flow. Second operand 14 states and 358 transitions. [2023-11-23 22:36:46,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 1852 transitions, 35891 flow [2023-11-23 22:36:48,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 1852 transitions, 35343 flow, removed 266 selfloop flow, removed 3 redundant places. [2023-11-23 22:36:48,921 INFO L231 Difference]: Finished difference. Result has 201 places, 1487 transitions, 29925 flow [2023-11-23 22:36:48,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=21691, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=660, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=29925, PETRI_PLACES=201, PETRI_TRANSITIONS=1487} [2023-11-23 22:36:48,922 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 165 predicate places. [2023-11-23 22:36:48,922 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 1487 transitions, 29925 flow [2023-11-23 22:36:48,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 states have internal predecessors, (198), 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) [2023-11-23 22:36:48,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:36:48,923 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:36:48,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 22:36:49,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 22:36:49,124 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 22:36:49,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:49,124 INFO L85 PathProgramCache]: Analyzing trace with hash -803266817, now seen corresponding path program 5 times [2023-11-23 22:36:49,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:49,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163743528] [2023-11-23 22:36:49,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:49,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:36:49,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:49,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163743528] [2023-11-23 22:36:49,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163743528] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:36:49,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569957476] [2023-11-23 22:36:49,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 22:36:49,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:49,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:36:49,577 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:36:49,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c315945c-2d08-47d2-9524-0e8518e8011f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:36:49,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-23 22:36:49,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:36:49,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 22:36:49,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:36:50,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:36:50,371 INFO L327 TraceCheckSpWp]: Computing backward predicates...