./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/test-hard1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/test-hard1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI --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 34f393fd72a97393a0a39d407b9330aa7c1c7e210ad76310ea88c9427f882106 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:54:04,574 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:54:04,643 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:54:04,649 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:54:04,650 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:54:04,676 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:54:04,676 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:54:04,677 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:54:04,678 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:54:04,678 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:54:04,679 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:54:04,680 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:54:04,681 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:54:04,681 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:54:04,682 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:54:04,682 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:54:04,683 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:54:04,684 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:54:04,684 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:54:04,685 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:54:04,685 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:54:04,686 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:54:04,687 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:54:04,687 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:54:04,688 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:54:04,688 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:54:04,689 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:54:04,690 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:54:04,690 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:54:04,691 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:54:04,691 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:54:04,692 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:54:04,692 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:54:04,693 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:54:04,693 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:54:04,693 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:54:04,694 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:54:04,694 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:54:04,695 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:54:04,695 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:54:04,695 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:54:04,699 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_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34f393fd72a97393a0a39d407b9330aa7c1c7e210ad76310ea88c9427f882106 [2023-11-24 21:54:04,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:54:05,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:54:05,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:54:05,010 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:54:05,011 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:54:05,012 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/test-hard1.wvr.c [2023-11-24 21:54:08,042 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:54:08,326 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:54:08,326 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/sv-benchmarks/c/weaver/test-hard1.wvr.c [2023-11-24 21:54:08,334 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/data/5ee8950c4/98ca1631f4ff4f1d8b16cd310ad1f0e3/FLAG53fd9995b [2023-11-24 21:54:08,350 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/data/5ee8950c4/98ca1631f4ff4f1d8b16cd310ad1f0e3 [2023-11-24 21:54:08,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:54:08,354 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:54:08,355 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:54:08,356 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:54:08,365 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:54:08,365 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:54:08" (1/1) ... [2023-11-24 21:54:08,367 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d36bf2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:08, skipping insertion in model container [2023-11-24 21:54:08,367 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:54:08" (1/1) ... [2023-11-24 21:54:08,394 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:54:08,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:54:08,613 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:54:08,644 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:54:08,653 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:54:08,653 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:54:08,661 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:54:08,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:08 WrapperNode [2023-11-24 21:54:08,662 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:54:08,664 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:54:08,664 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:54:08,664 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:54:08,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:08" (1/1) ... [2023-11-24 21:54:08,680 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:08" (1/1) ... [2023-11-24 21:54:08,703 INFO L138 Inliner]: procedures = 24, calls = 57, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 99 [2023-11-24 21:54:08,704 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:54:08,705 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:54:08,705 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:54:08,705 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:54:08,717 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:08" (1/1) ... [2023-11-24 21:54:08,717 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:08" (1/1) ... [2023-11-24 21:54:08,721 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:08" (1/1) ... [2023-11-24 21:54:08,758 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-24 21:54:08,759 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:08" (1/1) ... [2023-11-24 21:54:08,759 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:08" (1/1) ... [2023-11-24 21:54:08,769 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:08" (1/1) ... [2023-11-24 21:54:08,781 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:08" (1/1) ... [2023-11-24 21:54:08,784 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:08" (1/1) ... [2023-11-24 21:54:08,786 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:08" (1/1) ... [2023-11-24 21:54:08,790 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:54:08,791 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:54:08,791 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:54:08,791 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:54:08,792 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:08" (1/1) ... [2023-11-24 21:54:08,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:54:08,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:54:08,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:54:08,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:54:08,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:54:08,878 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:54:08,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:54:08,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:54:08,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:54:08,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-24 21:54:08,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-24 21:54:08,880 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-24 21:54:08,880 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-24 21:54:08,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:54:08,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:54:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:54:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:54:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:54:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:54:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:54:08,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:54:08,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:54:08,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:54:08,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:54:08,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:54:08,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:54:08,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:54:08,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:54:08,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:54:08,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:54:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:54:08,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:54:08,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:54:08,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:54:08,887 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:54:09,008 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:54:09,010 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:54:09,340 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:54:09,677 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:54:09,678 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 21:54:09,678 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:54:09 BoogieIcfgContainer [2023-11-24 21:54:09,679 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:54:09,681 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:54:09,682 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:54:09,685 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:54:09,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:54:08" (1/3) ... [2023-11-24 21:54:09,687 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@266703be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:54:09, skipping insertion in model container [2023-11-24 21:54:09,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:08" (2/3) ... [2023-11-24 21:54:09,687 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@266703be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:54:09, skipping insertion in model container [2023-11-24 21:54:09,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:54:09" (3/3) ... [2023-11-24 21:54:09,689 INFO L112 eAbstractionObserver]: Analyzing ICFG test-hard1.wvr.c [2023-11-24 21:54:09,711 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:54:09,711 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-24 21:54:09,712 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:54:09,780 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-24 21:54:09,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 73 transitions, 174 flow [2023-11-24 21:54:09,872 INFO L124 PetriNetUnfolderBase]: 4/69 cut-off events. [2023-11-24 21:54:09,872 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-24 21:54:09,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 69 events. 4/69 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 114 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-11-24 21:54:09,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 73 transitions, 174 flow [2023-11-24 21:54:09,883 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 68 transitions, 160 flow [2023-11-24 21:54:09,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:54:09,901 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;@31c88d3e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:54:09,901 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-24 21:54:09,906 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:54:09,906 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:54:09,906 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:54:09,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:09,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:54:09,908 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:09,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:09,914 INFO L85 PathProgramCache]: Analyzing trace with hash 13356, now seen corresponding path program 1 times [2023-11-24 21:54:09,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:09,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779078782] [2023-11-24 21:54:09,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:09,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:10,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:10,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779078782] [2023-11-24 21:54:10,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779078782] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:10,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:10,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:54:10,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143927503] [2023-11-24 21:54:10,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:10,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:10,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:10,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:10,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:10,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2023-11-24 21:54:10,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:10,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:10,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2023-11-24 21:54:10,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:11,117 INFO L124 PetriNetUnfolderBase]: 812/1652 cut-off events. [2023-11-24 21:54:11,117 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-11-24 21:54:11,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2914 conditions, 1652 events. 812/1652 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11747 event pairs, 772 based on Foata normal form. 1/1342 useless extension candidates. Maximal degree in co-relation 2484. Up to 1136 conditions per place. [2023-11-24 21:54:11,146 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 23 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-11-24 21:54:11,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 64 transitions, 200 flow [2023-11-24 21:54:11,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:11,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:11,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-24 21:54:11,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7397260273972602 [2023-11-24 21:54:11,161 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-24 21:54:11,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-24 21:54:11,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:11,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-24 21:54:11,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:11,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:11,174 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:11,176 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 160 flow. Second operand 3 states and 162 transitions. [2023-11-24 21:54:11,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 64 transitions, 200 flow [2023-11-24 21:54:11,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 64 transitions, 184 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-24 21:54:11,188 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 138 flow [2023-11-24 21:54:11,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2023-11-24 21:54:11,195 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -10 predicate places. [2023-11-24 21:54:11,195 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 138 flow [2023-11-24 21:54:11,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:11,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:11,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:54:11,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:54:11,197 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:11,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:11,198 INFO L85 PathProgramCache]: Analyzing trace with hash 13357, now seen corresponding path program 1 times [2023-11-24 21:54:11,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:11,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337466594] [2023-11-24 21:54:11,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:11,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:11,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:11,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337466594] [2023-11-24 21:54:11,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337466594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:11,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:11,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:54:11,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432083176] [2023-11-24 21:54:11,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:11,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:11,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:11,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:11,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:11,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 73 [2023-11-24 21:54:11,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:11,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:11,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 73 [2023-11-24 21:54:11,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:11,748 INFO L124 PetriNetUnfolderBase]: 596/1354 cut-off events. [2023-11-24 21:54:11,750 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-24 21:54:11,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2236 conditions, 1354 events. 596/1354 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9690 event pairs, 556 based on Foata normal form. 82/1179 useless extension candidates. Maximal degree in co-relation 2230. Up to 838 conditions per place. [2023-11-24 21:54:11,765 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 21 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-11-24 21:54:11,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 62 transitions, 178 flow [2023-11-24 21:54:11,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:11,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2023-11-24 21:54:11,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7534246575342466 [2023-11-24 21:54:11,770 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2023-11-24 21:54:11,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2023-11-24 21:54:11,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:11,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2023-11-24 21:54:11,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:11,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:11,779 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:11,783 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 138 flow. Second operand 3 states and 165 transitions. [2023-11-24 21:54:11,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 62 transitions, 178 flow [2023-11-24 21:54:11,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 62 transitions, 177 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:11,786 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 135 flow [2023-11-24 21:54:11,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2023-11-24 21:54:11,787 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -11 predicate places. [2023-11-24 21:54:11,788 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 135 flow [2023-11-24 21:54:11,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:11,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:11,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:54:11,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:54:11,790 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:11,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:11,790 INFO L85 PathProgramCache]: Analyzing trace with hash 398307919, now seen corresponding path program 1 times [2023-11-24 21:54:11,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:11,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987051220] [2023-11-24 21:54:11,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:11,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:11,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:11,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987051220] [2023-11-24 21:54:11,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987051220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:11,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:11,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:54:11,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683549417] [2023-11-24 21:54:11,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:11,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:11,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:11,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:11,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:11,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2023-11-24 21:54:11,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:11,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:11,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2023-11-24 21:54:11,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:12,183 INFO L124 PetriNetUnfolderBase]: 652/1380 cut-off events. [2023-11-24 21:54:12,183 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-24 21:54:12,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2349 conditions, 1380 events. 652/1380 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9662 event pairs, 612 based on Foata normal form. 0/1182 useless extension candidates. Maximal degree in co-relation 2342. Up to 924 conditions per place. [2023-11-24 21:54:12,200 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 23 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-11-24 21:54:12,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 179 flow [2023-11-24 21:54:12,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:12,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-11-24 21:54:12,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7351598173515982 [2023-11-24 21:54:12,206 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-11-24 21:54:12,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-11-24 21:54:12,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:12,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-11-24 21:54:12,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:12,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:12,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:12,210 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 135 flow. Second operand 3 states and 161 transitions. [2023-11-24 21:54:12,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 179 flow [2023-11-24 21:54:12,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 60 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:12,215 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 132 flow [2023-11-24 21:54:12,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2023-11-24 21:54:12,218 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -12 predicate places. [2023-11-24 21:54:12,218 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 132 flow [2023-11-24 21:54:12,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:12,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:12,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:54:12,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:54:12,220 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:12,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:12,222 INFO L85 PathProgramCache]: Analyzing trace with hash 398307920, now seen corresponding path program 1 times [2023-11-24 21:54:12,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:12,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515542386] [2023-11-24 21:54:12,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:12,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:12,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:12,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515542386] [2023-11-24 21:54:12,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515542386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:12,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:12,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:54:12,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319193938] [2023-11-24 21:54:12,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:12,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:12,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:12,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:12,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:12,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 73 [2023-11-24 21:54:12,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:12,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:12,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 73 [2023-11-24 21:54:12,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:12,545 INFO L124 PetriNetUnfolderBase]: 596/1294 cut-off events. [2023-11-24 21:54:12,546 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-24 21:54:12,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2178 conditions, 1294 events. 596/1294 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9065 event pairs, 556 based on Foata normal form. 30/1127 useless extension candidates. Maximal degree in co-relation 2170. Up to 838 conditions per place. [2023-11-24 21:54:12,560 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 21 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-11-24 21:54:12,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 58 transitions, 172 flow [2023-11-24 21:54:12,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:12,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:12,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2023-11-24 21:54:12,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7534246575342466 [2023-11-24 21:54:12,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2023-11-24 21:54:12,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2023-11-24 21:54:12,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:12,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2023-11-24 21:54:12,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:12,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:12,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:12,567 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 132 flow. Second operand 3 states and 165 transitions. [2023-11-24 21:54:12,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 58 transitions, 172 flow [2023-11-24 21:54:12,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 58 transitions, 171 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:12,570 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 129 flow [2023-11-24 21:54:12,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-11-24 21:54:12,573 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -13 predicate places. [2023-11-24 21:54:12,574 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 129 flow [2023-11-24 21:54:12,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:12,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:12,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:12,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:54:12,577 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:12,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:12,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1003001004, now seen corresponding path program 1 times [2023-11-24 21:54:12,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:12,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580869942] [2023-11-24 21:54:12,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:12,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:12,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:12,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580869942] [2023-11-24 21:54:12,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580869942] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:12,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:12,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:54:12,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786086928] [2023-11-24 21:54:12,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:12,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:12,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:12,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:12,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:12,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2023-11-24 21:54:12,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:12,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:12,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2023-11-24 21:54:12,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:12,929 INFO L124 PetriNetUnfolderBase]: 620/1300 cut-off events. [2023-11-24 21:54:12,929 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-24 21:54:12,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2227 conditions, 1300 events. 620/1300 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9078 event pairs, 580 based on Foata normal form. 0/1133 useless extension candidates. Maximal degree in co-relation 2218. Up to 880 conditions per place. [2023-11-24 21:54:12,942 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 23 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-11-24 21:54:12,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 56 transitions, 173 flow [2023-11-24 21:54:12,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:12,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-11-24 21:54:12,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7351598173515982 [2023-11-24 21:54:12,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-11-24 21:54:12,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-11-24 21:54:12,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:12,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-11-24 21:54:12,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:12,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:12,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:12,947 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 129 flow. Second operand 3 states and 161 transitions. [2023-11-24 21:54:12,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 56 transitions, 173 flow [2023-11-24 21:54:12,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 56 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:12,951 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 126 flow [2023-11-24 21:54:12,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2023-11-24 21:54:12,955 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -14 predicate places. [2023-11-24 21:54:12,955 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 126 flow [2023-11-24 21:54:12,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:12,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:12,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:12,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:54:12,956 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:12,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:12,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1003001003, now seen corresponding path program 1 times [2023-11-24 21:54:12,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:12,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217334309] [2023-11-24 21:54:12,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:12,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:13,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:13,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217334309] [2023-11-24 21:54:13,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217334309] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:13,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:13,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:54:13,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045139062] [2023-11-24 21:54:13,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:13,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:13,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:13,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:13,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:13,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 73 [2023-11-24 21:54:13,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:13,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:13,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 73 [2023-11-24 21:54:13,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:13,327 INFO L124 PetriNetUnfolderBase]: 596/1258 cut-off events. [2023-11-24 21:54:13,327 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-24 21:54:13,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2144 conditions, 1258 events. 596/1258 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 8719 event pairs, 556 based on Foata normal form. 18/1115 useless extension candidates. Maximal degree in co-relation 2134. Up to 838 conditions per place. [2023-11-24 21:54:13,341 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 21 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-11-24 21:54:13,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 54 transitions, 166 flow [2023-11-24 21:54:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:13,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:13,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2023-11-24 21:54:13,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7534246575342466 [2023-11-24 21:54:13,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2023-11-24 21:54:13,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2023-11-24 21:54:13,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:13,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2023-11-24 21:54:13,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:13,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:13,346 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:13,347 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 126 flow. Second operand 3 states and 165 transitions. [2023-11-24 21:54:13,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 54 transitions, 166 flow [2023-11-24 21:54:13,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 54 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:13,349 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 123 flow [2023-11-24 21:54:13,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2023-11-24 21:54:13,350 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -15 predicate places. [2023-11-24 21:54:13,350 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 123 flow [2023-11-24 21:54:13,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:13,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:13,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:13,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:54:13,352 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:13,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:13,352 INFO L85 PathProgramCache]: Analyzing trace with hash -315011094, now seen corresponding path program 1 times [2023-11-24 21:54:13,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:13,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854449462] [2023-11-24 21:54:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:13,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:13,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:13,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854449462] [2023-11-24 21:54:13,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854449462] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:13,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:13,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:54:13,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183786827] [2023-11-24 21:54:13,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:13,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:13,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:13,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:13,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:13,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2023-11-24 21:54:13,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:13,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:13,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2023-11-24 21:54:13,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:13,658 INFO L124 PetriNetUnfolderBase]: 652/1284 cut-off events. [2023-11-24 21:54:13,658 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-24 21:54:13,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2257 conditions, 1284 events. 652/1284 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8581 event pairs, 612 based on Foata normal form. 0/1165 useless extension candidates. Maximal degree in co-relation 2246. Up to 924 conditions per place. [2023-11-24 21:54:13,674 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 23 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-11-24 21:54:13,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 52 transitions, 167 flow [2023-11-24 21:54:13,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:13,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:13,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-11-24 21:54:13,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7351598173515982 [2023-11-24 21:54:13,676 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-11-24 21:54:13,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-11-24 21:54:13,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:13,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-11-24 21:54:13,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:13,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:13,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:13,679 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 123 flow. Second operand 3 states and 161 transitions. [2023-11-24 21:54:13,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 52 transitions, 167 flow [2023-11-24 21:54:13,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 52 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:13,681 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 120 flow [2023-11-24 21:54:13,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2023-11-24 21:54:13,683 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -16 predicate places. [2023-11-24 21:54:13,683 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 120 flow [2023-11-24 21:54:13,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:13,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:13,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:13,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:54:13,684 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:13,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:13,684 INFO L85 PathProgramCache]: Analyzing trace with hash -315011093, now seen corresponding path program 1 times [2023-11-24 21:54:13,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:13,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842898151] [2023-11-24 21:54:13,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:13,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:13,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:13,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842898151] [2023-11-24 21:54:13,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842898151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:13,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:13,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:54:13,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462350123] [2023-11-24 21:54:13,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:13,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:13,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:13,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:13,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:13,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 73 [2023-11-24 21:54:13,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:13,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:13,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 73 [2023-11-24 21:54:13,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:13,985 INFO L124 PetriNetUnfolderBase]: 596/1198 cut-off events. [2023-11-24 21:54:13,985 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-24 21:54:13,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2086 conditions, 1198 events. 596/1198 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8020 event pairs, 556 based on Foata normal form. 30/1127 useless extension candidates. Maximal degree in co-relation 2074. Up to 838 conditions per place. [2023-11-24 21:54:13,998 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 21 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-11-24 21:54:13,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 160 flow [2023-11-24 21:54:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:14,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2023-11-24 21:54:14,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7534246575342466 [2023-11-24 21:54:14,000 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2023-11-24 21:54:14,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2023-11-24 21:54:14,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:14,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2023-11-24 21:54:14,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:14,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:14,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:14,003 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 120 flow. Second operand 3 states and 165 transitions. [2023-11-24 21:54:14,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 160 flow [2023-11-24 21:54:14,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 50 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:14,005 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 117 flow [2023-11-24 21:54:14,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2023-11-24 21:54:14,006 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -17 predicate places. [2023-11-24 21:54:14,007 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 117 flow [2023-11-24 21:54:14,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:14,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:14,007 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:14,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:54:14,008 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:14,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:14,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1050377794, now seen corresponding path program 1 times [2023-11-24 21:54:14,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:14,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164807540] [2023-11-24 21:54:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:14,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:14,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:14,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164807540] [2023-11-24 21:54:14,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164807540] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:14,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:14,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:54:14,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927311096] [2023-11-24 21:54:14,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:14,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:14,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:14,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:14,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:14,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 73 [2023-11-24 21:54:14,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:14,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:14,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 73 [2023-11-24 21:54:14,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:14,505 INFO L124 PetriNetUnfolderBase]: 1367/2259 cut-off events. [2023-11-24 21:54:14,505 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-24 21:54:14,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4037 conditions, 2259 events. 1367/2259 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11870 event pairs, 123 based on Foata normal form. 1/2220 useless extension candidates. Maximal degree in co-relation 4024. Up to 1541 conditions per place. [2023-11-24 21:54:14,527 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 35 selfloop transitions, 5 changer transitions 1/69 dead transitions. [2023-11-24 21:54:14,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 244 flow [2023-11-24 21:54:14,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:14,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-11-24 21:54:14,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.863013698630137 [2023-11-24 21:54:14,530 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-11-24 21:54:14,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-11-24 21:54:14,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:14,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-11-24 21:54:14,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:14,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:14,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:14,532 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 117 flow. Second operand 3 states and 189 transitions. [2023-11-24 21:54:14,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 244 flow [2023-11-24 21:54:14,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:14,535 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 149 flow [2023-11-24 21:54:14,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2023-11-24 21:54:14,536 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -15 predicate places. [2023-11-24 21:54:14,537 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 149 flow [2023-11-24 21:54:14,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:14,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:14,537 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:14,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:54:14,538 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:14,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:14,538 INFO L85 PathProgramCache]: Analyzing trace with hash -124443516, now seen corresponding path program 1 times [2023-11-24 21:54:14,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:14,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641704722] [2023-11-24 21:54:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:14,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:15,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:15,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641704722] [2023-11-24 21:54:15,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641704722] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:15,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:15,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:54:15,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529245920] [2023-11-24 21:54:15,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:15,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:54:15,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:15,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:54:15,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:54:15,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 73 [2023-11-24 21:54:15,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:15,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:15,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 73 [2023-11-24 21:54:15,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:15,893 INFO L124 PetriNetUnfolderBase]: 3525/5463 cut-off events. [2023-11-24 21:54:15,893 INFO L125 PetriNetUnfolderBase]: For 1395/1408 co-relation queries the response was YES. [2023-11-24 21:54:15,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11988 conditions, 5463 events. 3525/5463 cut-off events. For 1395/1408 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 33015 event pairs, 855 based on Foata normal form. 2/5022 useless extension candidates. Maximal degree in co-relation 11973. Up to 2305 conditions per place. [2023-11-24 21:54:15,945 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 81 selfloop transitions, 9 changer transitions 0/113 dead transitions. [2023-11-24 21:54:15,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 113 transitions, 508 flow [2023-11-24 21:54:15,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:54:15,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:54:15,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 299 transitions. [2023-11-24 21:54:15,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8191780821917808 [2023-11-24 21:54:15,947 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 299 transitions. [2023-11-24 21:54:15,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 299 transitions. [2023-11-24 21:54:15,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:15,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 299 transitions. [2023-11-24 21:54:15,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 59.8) internal successors, (299), 5 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:15,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:15,951 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:15,951 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 149 flow. Second operand 5 states and 299 transitions. [2023-11-24 21:54:15,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 113 transitions, 508 flow [2023-11-24 21:54:15,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 113 transitions, 495 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:15,956 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 206 flow [2023-11-24 21:54:15,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2023-11-24 21:54:15,959 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -9 predicate places. [2023-11-24 21:54:15,959 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 206 flow [2023-11-24 21:54:15,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:15,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:15,960 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:15,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:54:15,960 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:15,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:15,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1383447498, now seen corresponding path program 2 times [2023-11-24 21:54:15,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:15,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594113904] [2023-11-24 21:54:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:15,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:16,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:16,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594113904] [2023-11-24 21:54:16,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594113904] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:54:16,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553469091] [2023-11-24 21:54:16,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:54:16,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:16,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:54:16,475 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:54:16,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:54:16,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:54:16,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:54:16,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:54:16,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:54:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:16,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:54:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:16,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553469091] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 21:54:16,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:54:16,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2023-11-24 21:54:16,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296709360] [2023-11-24 21:54:16,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:16,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:54:16,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:16,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:54:16,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:54:17,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 73 [2023-11-24 21:54:17,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 206 flow. Second operand has 6 states, 6 states have (on average 46.833333333333336) internal successors, (281), 6 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:17,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:17,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 73 [2023-11-24 21:54:17,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:19,046 INFO L124 PetriNetUnfolderBase]: 9173/13503 cut-off events. [2023-11-24 21:54:19,046 INFO L125 PetriNetUnfolderBase]: For 10682/12319 co-relation queries the response was YES. [2023-11-24 21:54:19,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35859 conditions, 13503 events. 9173/13503 cut-off events. For 10682/12319 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 86692 event pairs, 328 based on Foata normal form. 1400/14097 useless extension candidates. Maximal degree in co-relation 35841. Up to 3686 conditions per place. [2023-11-24 21:54:19,203 INFO L140 encePairwiseOnDemand]: 63/73 looper letters, 166 selfloop transitions, 38 changer transitions 0/226 dead transitions. [2023-11-24 21:54:19,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 226 transitions, 1243 flow [2023-11-24 21:54:19,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:54:19,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-24 21:54:19,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 637 transitions. [2023-11-24 21:54:19,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7932752179327521 [2023-11-24 21:54:19,207 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 637 transitions. [2023-11-24 21:54:19,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 637 transitions. [2023-11-24 21:54:19,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:19,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 637 transitions. [2023-11-24 21:54:19,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 57.90909090909091) internal successors, (637), 11 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:19,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 73.0) internal successors, (876), 12 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:19,214 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 73.0) internal successors, (876), 12 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:19,214 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 206 flow. Second operand 11 states and 637 transitions. [2023-11-24 21:54:19,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 226 transitions, 1243 flow [2023-11-24 21:54:19,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 226 transitions, 1219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:19,224 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 514 flow [2023-11-24 21:54:19,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=514, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2023-11-24 21:54:19,225 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 9 predicate places. [2023-11-24 21:54:19,225 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 514 flow [2023-11-24 21:54:19,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 46.833333333333336) internal successors, (281), 6 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:19,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:19,226 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:19,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 21:54:19,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:19,432 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:19,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:19,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1642986694, now seen corresponding path program 1 times [2023-11-24 21:54:19,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:19,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908005558] [2023-11-24 21:54:19,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:19,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:19,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:19,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908005558] [2023-11-24 21:54:19,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908005558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:19,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:19,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:54:19,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836528962] [2023-11-24 21:54:19,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:19,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:54:19,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:19,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:54:19,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:54:19,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 73 [2023-11-24 21:54:19,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 514 flow. Second operand has 6 states, 6 states have (on average 47.833333333333336) internal successors, (287), 6 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:19,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:19,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 73 [2023-11-24 21:54:19,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:23,778 INFO L124 PetriNetUnfolderBase]: 14758/22478 cut-off events. [2023-11-24 21:54:23,779 INFO L125 PetriNetUnfolderBase]: For 40130/41656 co-relation queries the response was YES. [2023-11-24 21:54:23,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71599 conditions, 22478 events. 14758/22478 cut-off events. For 40130/41656 co-relation queries the response was YES. Maximal size of possible extension queue 1199. Compared 156764 event pairs, 1043 based on Foata normal form. 899/22743 useless extension candidates. Maximal degree in co-relation 71571. Up to 9900 conditions per place. [2023-11-24 21:54:24,267 INFO L140 encePairwiseOnDemand]: 62/73 looper letters, 137 selfloop transitions, 101 changer transitions 0/278 dead transitions. [2023-11-24 21:54:24,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 278 transitions, 1972 flow [2023-11-24 21:54:24,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:54:24,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-24 21:54:24,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 545 transitions. [2023-11-24 21:54:24,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8295281582952816 [2023-11-24 21:54:24,272 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 545 transitions. [2023-11-24 21:54:24,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 545 transitions. [2023-11-24 21:54:24,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:24,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 545 transitions. [2023-11-24 21:54:24,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.55555555555556) internal successors, (545), 9 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:24,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:24,279 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:24,279 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 514 flow. Second operand 9 states and 545 transitions. [2023-11-24 21:54:24,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 278 transitions, 1972 flow [2023-11-24 21:54:25,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 278 transitions, 1972 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:54:25,836 INFO L231 Difference]: Finished difference. Result has 101 places, 179 transitions, 1487 flow [2023-11-24 21:54:25,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1487, PETRI_PLACES=101, PETRI_TRANSITIONS=179} [2023-11-24 21:54:25,837 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 24 predicate places. [2023-11-24 21:54:25,837 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 179 transitions, 1487 flow [2023-11-24 21:54:25,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 47.833333333333336) internal successors, (287), 6 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:25,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:25,838 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:25,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:54:25,839 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:25,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:25,840 INFO L85 PathProgramCache]: Analyzing trace with hash 957372676, now seen corresponding path program 3 times [2023-11-24 21:54:25,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:25,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466621577] [2023-11-24 21:54:25,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:25,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:26,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:26,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466621577] [2023-11-24 21:54:26,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466621577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:54:26,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066183114] [2023-11-24 21:54:26,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:54:26,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:26,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:54:26,346 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:54:26,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe72ff9-4c9b-43a7-bde6-b23480edfcdf/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:54:26,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-24 21:54:26,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:54:26,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 21:54:26,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:54:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:26,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:54:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:27,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066183114] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:54:27,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:54:27,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2023-11-24 21:54:27,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553072818] [2023-11-24 21:54:27,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:54:27,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-24 21:54:27,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:27,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-24 21:54:27,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2023-11-24 21:54:27,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 73 [2023-11-24 21:54:27,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 179 transitions, 1487 flow. Second operand has 18 states, 18 states have (on average 44.77777777777778) internal successors, (806), 18 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:27,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:27,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 73 [2023-11-24 21:54:27,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:51,866 INFO L124 PetriNetUnfolderBase]: 93224/138506 cut-off events. [2023-11-24 21:54:51,866 INFO L125 PetriNetUnfolderBase]: For 438935/444521 co-relation queries the response was YES. [2023-11-24 21:54:52,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543169 conditions, 138506 events. 93224/138506 cut-off events. For 438935/444521 co-relation queries the response was YES. Maximal size of possible extension queue 6318. Compared 1135621 event pairs, 1780 based on Foata normal form. 8669/146165 useless extension candidates. Maximal degree in co-relation 543132. Up to 37638 conditions per place. [2023-11-24 21:54:53,881 INFO L140 encePairwiseOnDemand]: 55/73 looper letters, 860 selfloop transitions, 955 changer transitions 7/1848 dead transitions. [2023-11-24 21:54:53,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 1848 transitions, 17452 flow [2023-11-24 21:54:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-24 21:54:53,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-11-24 21:54:53,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3326 transitions. [2023-11-24 21:54:53,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7855455833726972 [2023-11-24 21:54:53,897 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3326 transitions. [2023-11-24 21:54:53,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3326 transitions. [2023-11-24 21:54:53,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:53,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3326 transitions. [2023-11-24 21:54:53,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 57.3448275862069) internal successors, (3326), 58 states have internal predecessors, (3326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:53,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 73.0) internal successors, (4307), 59 states have internal predecessors, (4307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:53,927 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 73.0) internal successors, (4307), 59 states have internal predecessors, (4307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:53,927 INFO L175 Difference]: Start difference. First operand has 101 places, 179 transitions, 1487 flow. Second operand 58 states and 3326 transitions. [2023-11-24 21:54:53,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 1848 transitions, 17452 flow