./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/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_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/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_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/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 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:43:13,837 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:43:13,994 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:43:13,999 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:43:14,002 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:43:14,043 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:43:14,044 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:43:14,045 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:43:14,046 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:43:14,051 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:43:14,052 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:43:14,053 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:43:14,054 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:43:14,056 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:43:14,056 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:43:14,057 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:43:14,057 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:43:14,058 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:43:14,058 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:43:14,059 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:43:14,059 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:43:14,060 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:43:14,060 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:43:14,061 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:43:14,061 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:43:14,062 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:43:14,062 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:43:14,062 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:43:14,063 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:43:14,064 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:43:14,065 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:43:14,065 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:43:14,066 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:43:14,066 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:43:14,066 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:43:14,066 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:43:14,067 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:43:14,067 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:43:14,067 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:43:14,067 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:43:14,068 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:43:14,068 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_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 [2023-11-24 21:43:14,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:43:14,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:43:14,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:43:14,454 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:43:14,455 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:43:14,456 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2023-11-24 21:43:17,630 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:43:17,909 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:43:17,910 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2023-11-24 21:43:17,919 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/data/65d5cb399/67f9c807d789453295b5066b03625131/FLAGa8acbc963 [2023-11-24 21:43:18,210 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/data/65d5cb399/67f9c807d789453295b5066b03625131 [2023-11-24 21:43:18,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:43:18,217 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:43:18,220 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:43:18,221 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:43:18,226 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:43:18,227 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:43:18" (1/1) ... [2023-11-24 21:43:18,228 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1717b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:18, skipping insertion in model container [2023-11-24 21:43:18,228 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:43:18" (1/1) ... [2023-11-24 21:43:18,257 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:43:18,477 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:43:18,488 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:43:18,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:43:18,557 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:43:18,558 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:18 WrapperNode [2023-11-24 21:43:18,558 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:43:18,559 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:43:18,560 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:43:18,560 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:43:18,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:18" (1/1) ... [2023-11-24 21:43:18,580 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:18" (1/1) ... [2023-11-24 21:43:18,648 INFO L138 Inliner]: procedures = 25, calls = 56, calls flagged for inlining = 22, calls inlined = 30, statements flattened = 411 [2023-11-24 21:43:18,648 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:43:18,649 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:43:18,649 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:43:18,649 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:43:18,667 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:18" (1/1) ... [2023-11-24 21:43:18,668 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:18" (1/1) ... [2023-11-24 21:43:18,685 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:18" (1/1) ... [2023-11-24 21:43:18,725 INFO L175 MemorySlicer]: Split 24 memory accesses to 4 slices as follows [2, 2, 18, 2]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 2, 1]. [2023-11-24 21:43:18,726 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:18" (1/1) ... [2023-11-24 21:43:18,726 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:18" (1/1) ... [2023-11-24 21:43:18,768 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:18" (1/1) ... [2023-11-24 21:43:18,775 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:18" (1/1) ... [2023-11-24 21:43:18,778 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:18" (1/1) ... [2023-11-24 21:43:18,797 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:18" (1/1) ... [2023-11-24 21:43:18,803 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:43:18,804 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:43:18,805 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:43:18,805 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:43:18,806 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:18" (1/1) ... [2023-11-24 21:43:18,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:43:18,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:18,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:43:18,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:43:18,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:43:18,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:43:18,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:43:18,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:43:18,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:43:18,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:43:18,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:43:18,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:43:18,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:43:18,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:43:18,922 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:43:18,922 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:43:18,924 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:43:18,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:43:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:43:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:43:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:43:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:43:18,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:43:18,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:43:18,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:43:18,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:43:18,929 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 21:43:19,133 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:43:19,135 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:43:20,082 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:43:20,748 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:43:20,748 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 21:43:20,749 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:43:20 BoogieIcfgContainer [2023-11-24 21:43:20,749 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:43:20,751 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:43:20,751 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:43:20,754 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:43:20,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:43:18" (1/3) ... [2023-11-24 21:43:20,755 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4723b960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:43:20, skipping insertion in model container [2023-11-24 21:43:20,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:18" (2/3) ... [2023-11-24 21:43:20,760 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4723b960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:43:20, skipping insertion in model container [2023-11-24 21:43:20,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:43:20" (3/3) ... [2023-11-24 21:43:20,762 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2023-11-24 21:43:20,784 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:43:20,784 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2023-11-24 21:43:20,784 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:43:20,894 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:43:20,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 139 transitions, 292 flow [2023-11-24 21:43:20,992 INFO L124 PetriNetUnfolderBase]: 20/137 cut-off events. [2023-11-24 21:43:20,992 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:43:20,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 137 events. 20/137 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 450 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2023-11-24 21:43:20,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 139 transitions, 292 flow [2023-11-24 21:43:21,006 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 136 transitions, 284 flow [2023-11-24 21:43:21,016 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:43:21,024 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;@3db11179, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:43:21,024 INFO L358 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2023-11-24 21:43:21,028 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:43:21,028 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-24 21:43:21,028 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:43:21,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:21,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:43:21,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:43:21,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:21,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1303401, now seen corresponding path program 1 times [2023-11-24 21:43:21,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:21,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008978692] [2023-11-24 21:43:21,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:21,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:21,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:21,313 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 21:43:21,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:21,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008978692] [2023-11-24 21:43:21,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008978692] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:21,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:21,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:43:21,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143487724] [2023-11-24 21:43:21,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:21,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:21,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:21,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:21,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:21,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 139 [2023-11-24 21:43:21,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 136 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states 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 21:43:21,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:21,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 139 [2023-11-24 21:43:21,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:22,163 INFO L124 PetriNetUnfolderBase]: 1323/3208 cut-off events. [2023-11-24 21:43:22,163 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-24 21:43:22,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5159 conditions, 3208 events. 1323/3208 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 23482 event pairs, 701 based on Foata normal form. 60/2473 useless extension candidates. Maximal degree in co-relation 5009. Up to 1897 conditions per place. [2023-11-24 21:43:22,200 INFO L140 encePairwiseOnDemand]: 132/139 looper letters, 54 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2023-11-24 21:43:22,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 130 transitions, 384 flow [2023-11-24 21:43:22,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:22,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:22,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 292 transitions. [2023-11-24 21:43:22,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7002398081534772 [2023-11-24 21:43:22,218 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 292 transitions. [2023-11-24 21:43:22,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 292 transitions. [2023-11-24 21:43:22,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:22,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 292 transitions. [2023-11-24 21:43:22,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 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 21:43:22,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:22,233 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:22,235 INFO L175 Difference]: Start difference. First operand has 123 places, 136 transitions, 284 flow. Second operand 3 states and 292 transitions. [2023-11-24 21:43:22,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 130 transitions, 384 flow [2023-11-24 21:43:22,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 130 transitions, 376 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:43:22,246 INFO L231 Difference]: Finished difference. Result has 117 places, 130 transitions, 268 flow [2023-11-24 21:43:22,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=117, PETRI_TRANSITIONS=130} [2023-11-24 21:43:22,252 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -6 predicate places. [2023-11-24 21:43:22,252 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 130 transitions, 268 flow [2023-11-24 21:43:22,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states 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 21:43:22,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:22,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:43:22,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:43:22,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:43:22,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:22,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1303402, now seen corresponding path program 1 times [2023-11-24 21:43:22,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:22,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247393678] [2023-11-24 21:43:22,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:22,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:22,587 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 21:43:22,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:22,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247393678] [2023-11-24 21:43:22,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247393678] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:22,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:22,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:22,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291262480] [2023-11-24 21:43:22,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:22,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:22,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:22,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:22,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:22,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 139 [2023-11-24 21:43:22,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 130 transitions, 268 flow. Second operand has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states 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 21:43:22,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:22,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 139 [2023-11-24 21:43:22,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:23,353 INFO L124 PetriNetUnfolderBase]: 1323/3212 cut-off events. [2023-11-24 21:43:23,353 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-24 21:43:23,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5140 conditions, 3212 events. 1323/3212 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 23486 event pairs, 701 based on Foata normal form. 1/2417 useless extension candidates. Maximal degree in co-relation 5109. Up to 1905 conditions per place. [2023-11-24 21:43:23,388 INFO L140 encePairwiseOnDemand]: 132/139 looper letters, 58 selfloop transitions, 4 changer transitions 0/134 dead transitions. [2023-11-24 21:43:23,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 134 transitions, 400 flow [2023-11-24 21:43:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:23,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2023-11-24 21:43:23,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7122302158273381 [2023-11-24 21:43:23,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2023-11-24 21:43:23,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2023-11-24 21:43:23,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:23,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2023-11-24 21:43:23,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states 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 21:43:23,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:23,399 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:23,399 INFO L175 Difference]: Start difference. First operand has 117 places, 130 transitions, 268 flow. Second operand 3 states and 297 transitions. [2023-11-24 21:43:23,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 134 transitions, 400 flow [2023-11-24 21:43:23,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 134 transitions, 396 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:23,405 INFO L231 Difference]: Finished difference. Result has 118 places, 132 transitions, 290 flow [2023-11-24 21:43:23,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=118, PETRI_TRANSITIONS=132} [2023-11-24 21:43:23,407 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -5 predicate places. [2023-11-24 21:43:23,407 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 132 transitions, 290 flow [2023-11-24 21:43:23,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states 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 21:43:23,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:23,408 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-24 21:43:23,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:43:23,409 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:43:23,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:23,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1252610931, now seen corresponding path program 1 times [2023-11-24 21:43:23,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:23,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179022356] [2023-11-24 21:43:23,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:23,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:23,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:23,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179022356] [2023-11-24 21:43:23,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179022356] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:23,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582054227] [2023-11-24 21:43:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:23,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:23,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:23,779 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:23,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:43:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:23,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-24 21:43:23,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:24,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:43:24,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:24,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:24,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:24,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:24,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:24,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:43:24,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:24,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:43:24,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:24,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:24,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:24,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:24,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582054227] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:24,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:24,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-24 21:43:24,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899699458] [2023-11-24 21:43:24,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:24,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:43:24,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:24,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:43:24,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:43:24,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 139 [2023-11-24 21:43:24,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 132 transitions, 290 flow. Second operand has 9 states, 9 states have (on average 78.66666666666667) internal successors, (708), 9 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 21:43:24,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:24,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 139 [2023-11-24 21:43:24,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:25,517 INFO L124 PetriNetUnfolderBase]: 1327/3228 cut-off events. [2023-11-24 21:43:25,517 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-24 21:43:25,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5192 conditions, 3228 events. 1327/3228 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 23543 event pairs, 701 based on Foata normal form. 2/2435 useless extension candidates. Maximal degree in co-relation 5141. Up to 1907 conditions per place. [2023-11-24 21:43:25,546 INFO L140 encePairwiseOnDemand]: 132/139 looper letters, 64 selfloop transitions, 14 changer transitions 0/150 dead transitions. [2023-11-24 21:43:25,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 150 transitions, 504 flow [2023-11-24 21:43:25,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:43:25,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:43:25,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 548 transitions. [2023-11-24 21:43:25,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.657074340527578 [2023-11-24 21:43:25,550 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 548 transitions. [2023-11-24 21:43:25,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 548 transitions. [2023-11-24 21:43:25,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:25,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 548 transitions. [2023-11-24 21:43:25,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.33333333333333) internal successors, (548), 6 states have internal predecessors, (548), 0 states have call successors, (0), 0 states 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 21:43:25,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 21:43:25,556 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 21:43:25,556 INFO L175 Difference]: Start difference. First operand has 118 places, 132 transitions, 290 flow. Second operand 6 states and 548 transitions. [2023-11-24 21:43:25,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 150 transitions, 504 flow [2023-11-24 21:43:25,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 150 transitions, 498 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:43:25,563 INFO L231 Difference]: Finished difference. Result has 125 places, 142 transitions, 388 flow [2023-11-24 21:43:25,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=388, PETRI_PLACES=125, PETRI_TRANSITIONS=142} [2023-11-24 21:43:25,565 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 2 predicate places. [2023-11-24 21:43:25,565 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 142 transitions, 388 flow [2023-11-24 21:43:25,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.66666666666667) internal successors, (708), 9 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 21:43:25,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:25,566 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-24 21:43:25,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:25,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:25,773 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:43:25,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:25,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1163439630, now seen corresponding path program 2 times [2023-11-24 21:43:25,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:25,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909623161] [2023-11-24 21:43:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:25,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:26,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:26,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909623161] [2023-11-24 21:43:26,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909623161] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:26,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892561192] [2023-11-24 21:43:26,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:43:26,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:26,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:26,250 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:26,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:43:26,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:43:26,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:43:26,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-24 21:43:26,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:26,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-24 21:43:26,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:26,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:26,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:26,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:43:26,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:26,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:26,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:26,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:43:26,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:26,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:26,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:26,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892561192] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:26,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:26,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2023-11-24 21:43:26,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932611117] [2023-11-24 21:43:26,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:26,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-24 21:43:26,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:26,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-24 21:43:26,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-11-24 21:43:28,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 139 [2023-11-24 21:43:28,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 142 transitions, 388 flow. Second operand has 18 states, 18 states have (on average 78.83333333333333) internal successors, (1419), 18 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states 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 21:43:28,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:28,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 139 [2023-11-24 21:43:28,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:30,462 INFO L124 PetriNetUnfolderBase]: 1333/3260 cut-off events. [2023-11-24 21:43:30,462 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2023-11-24 21:43:30,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5330 conditions, 3260 events. 1333/3260 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 23608 event pairs, 701 based on Foata normal form. 16/2483 useless extension candidates. Maximal degree in co-relation 5189. Up to 1910 conditions per place. [2023-11-24 21:43:30,501 INFO L140 encePairwiseOnDemand]: 132/139 looper letters, 78 selfloop transitions, 32 changer transitions 0/182 dead transitions. [2023-11-24 21:43:30,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 182 transitions, 772 flow [2023-11-24 21:43:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:43:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-24 21:43:30,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1050 transitions. [2023-11-24 21:43:30,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6294964028776978 [2023-11-24 21:43:30,506 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1050 transitions. [2023-11-24 21:43:30,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1050 transitions. [2023-11-24 21:43:30,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:30,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1050 transitions. [2023-11-24 21:43:30,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 87.5) internal successors, (1050), 12 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states 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 21:43:30,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 139.0) internal successors, (1807), 13 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states 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 21:43:30,519 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 139.0) internal successors, (1807), 13 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states 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 21:43:30,519 INFO L175 Difference]: Start difference. First operand has 125 places, 142 transitions, 388 flow. Second operand 12 states and 1050 transitions. [2023-11-24 21:43:30,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 182 transitions, 772 flow [2023-11-24 21:43:30,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 182 transitions, 751 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-24 21:43:30,534 INFO L231 Difference]: Finished difference. Result has 140 places, 160 transitions, 589 flow [2023-11-24 21:43:30,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=589, PETRI_PLACES=140, PETRI_TRANSITIONS=160} [2023-11-24 21:43:30,537 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 17 predicate places. [2023-11-24 21:43:30,537 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 160 transitions, 589 flow [2023-11-24 21:43:30,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 78.83333333333333) internal successors, (1419), 18 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states 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 21:43:30,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:30,539 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1] [2023-11-24 21:43:30,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:30,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:30,745 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:43:30,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:30,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1374029079, now seen corresponding path program 3 times [2023-11-24 21:43:30,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:30,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884420825] [2023-11-24 21:43:30,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:30,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:30,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:30,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884420825] [2023-11-24 21:43:30,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884420825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:30,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:30,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:43:30,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348065146] [2023-11-24 21:43:30,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:30,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:43:30,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:30,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:43:30,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:43:30,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 139 [2023-11-24 21:43:30,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 160 transitions, 589 flow. Second operand has 8 states, 8 states have (on average 80.5) internal successors, (644), 8 states have internal predecessors, (644), 0 states have call successors, (0), 0 states 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 21:43:30,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:30,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 139 [2023-11-24 21:43:30,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:31,636 INFO L124 PetriNetUnfolderBase]: 1321/3222 cut-off events. [2023-11-24 21:43:31,636 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-11-24 21:43:31,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5207 conditions, 3222 events. 1321/3222 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 23481 event pairs, 701 based on Foata normal form. 2/2431 useless extension candidates. Maximal degree in co-relation 5194. Up to 1897 conditions per place. [2023-11-24 21:43:31,674 INFO L140 encePairwiseOnDemand]: 132/139 looper letters, 59 selfloop transitions, 13 changer transitions 0/144 dead transitions. [2023-11-24 21:43:31,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 144 transitions, 514 flow [2023-11-24 21:43:31,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:43:31,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-24 21:43:31,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 706 transitions. [2023-11-24 21:43:31,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6348920863309353 [2023-11-24 21:43:31,678 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 706 transitions. [2023-11-24 21:43:31,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 706 transitions. [2023-11-24 21:43:31,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:31,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 706 transitions. [2023-11-24 21:43:31,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.25) internal successors, (706), 8 states have internal predecessors, (706), 0 states have call successors, (0), 0 states 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 21:43:31,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 139.0) internal successors, (1251), 9 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states 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 21:43:31,686 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 139.0) internal successors, (1251), 9 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states 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 21:43:31,686 INFO L175 Difference]: Start difference. First operand has 140 places, 160 transitions, 589 flow. Second operand 8 states and 706 transitions. [2023-11-24 21:43:31,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 144 transitions, 514 flow [2023-11-24 21:43:31,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 144 transitions, 460 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-11-24 21:43:31,731 INFO L231 Difference]: Finished difference. Result has 131 places, 136 transitions, 334 flow [2023-11-24 21:43:31,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=334, PETRI_PLACES=131, PETRI_TRANSITIONS=136} [2023-11-24 21:43:31,732 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 8 predicate places. [2023-11-24 21:43:31,732 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 136 transitions, 334 flow [2023-11-24 21:43:31,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 80.5) internal successors, (644), 8 states have internal predecessors, (644), 0 states have call successors, (0), 0 states 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 21:43:31,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:31,733 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1] [2023-11-24 21:43:31,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:43:31,733 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:43:31,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:31,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1779886498, now seen corresponding path program 1 times [2023-11-24 21:43:31,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:31,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185057408] [2023-11-24 21:43:31,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:31,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-24 21:43:32,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:32,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185057408] [2023-11-24 21:43:32,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185057408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:32,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:32,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:32,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515752438] [2023-11-24 21:43:32,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:32,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:43:32,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:32,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:43:32,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:32,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 139 [2023-11-24 21:43:32,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 136 transitions, 334 flow. Second operand has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 21:43:32,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:32,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 139 [2023-11-24 21:43:32,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:32,879 INFO L124 PetriNetUnfolderBase]: 2082/4848 cut-off events. [2023-11-24 21:43:32,880 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-24 21:43:32,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7854 conditions, 4848 events. 2082/4848 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 37497 event pairs, 1164 based on Foata normal form. 0/3697 useless extension candidates. Maximal degree in co-relation 7846. Up to 2924 conditions per place. [2023-11-24 21:43:32,921 INFO L140 encePairwiseOnDemand]: 135/139 looper letters, 64 selfloop transitions, 2 changer transitions 0/134 dead transitions. [2023-11-24 21:43:32,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 134 transitions, 462 flow [2023-11-24 21:43:32,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:32,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:43:32,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 352 transitions. [2023-11-24 21:43:32,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6330935251798561 [2023-11-24 21:43:32,924 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 352 transitions. [2023-11-24 21:43:32,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 352 transitions. [2023-11-24 21:43:32,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:32,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 352 transitions. [2023-11-24 21:43:32,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states 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 21:43:32,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 21:43:32,930 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 21:43:32,930 INFO L175 Difference]: Start difference. First operand has 131 places, 136 transitions, 334 flow. Second operand 4 states and 352 transitions. [2023-11-24 21:43:32,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 134 transitions, 462 flow [2023-11-24 21:43:32,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 134 transitions, 436 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-24 21:43:32,935 INFO L231 Difference]: Finished difference. Result has 125 places, 134 transitions, 308 flow [2023-11-24 21:43:32,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=308, PETRI_PLACES=125, PETRI_TRANSITIONS=134} [2023-11-24 21:43:32,939 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 2 predicate places. [2023-11-24 21:43:32,939 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 134 transitions, 308 flow [2023-11-24 21:43:32,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 21:43:32,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:32,943 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1] [2023-11-24 21:43:32,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:43:32,943 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:43:32,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:32,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1779886497, now seen corresponding path program 1 times [2023-11-24 21:43:32,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:32,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742513610] [2023-11-24 21:43:32,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:32,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-24 21:43:33,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:33,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742513610] [2023-11-24 21:43:33,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742513610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:33,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:33,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:33,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473193152] [2023-11-24 21:43:33,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:33,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:33,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:33,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:33,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:33,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 139 [2023-11-24 21:43:33,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 134 transitions, 308 flow. Second operand has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 21:43:33,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:33,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 139 [2023-11-24 21:43:33,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:33,992 INFO L124 PetriNetUnfolderBase]: 1321/3206 cut-off events. [2023-11-24 21:43:33,992 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-24 21:43:34,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5173 conditions, 3206 events. 1321/3206 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 23341 event pairs, 701 based on Foata normal form. 266/2695 useless extension candidates. Maximal degree in co-relation 5165. Up to 1896 conditions per place. [2023-11-24 21:43:34,015 INFO L140 encePairwiseOnDemand]: 135/139 looper letters, 62 selfloop transitions, 2 changer transitions 0/132 dead transitions. [2023-11-24 21:43:34,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 132 transitions, 432 flow [2023-11-24 21:43:34,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:34,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:43:34,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2023-11-24 21:43:34,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.658273381294964 [2023-11-24 21:43:34,018 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 366 transitions. [2023-11-24 21:43:34,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 366 transitions. [2023-11-24 21:43:34,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:34,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 366 transitions. [2023-11-24 21:43:34,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states 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 21:43:34,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 21:43:34,023 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 21:43:34,024 INFO L175 Difference]: Start difference. First operand has 125 places, 134 transitions, 308 flow. Second operand 4 states and 366 transitions. [2023-11-24 21:43:34,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 132 transitions, 432 flow [2023-11-24 21:43:34,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 132 transitions, 429 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:34,028 INFO L231 Difference]: Finished difference. Result has 124 places, 132 transitions, 305 flow [2023-11-24 21:43:34,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=305, PETRI_PLACES=124, PETRI_TRANSITIONS=132} [2023-11-24 21:43:34,029 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 1 predicate places. [2023-11-24 21:43:34,030 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 132 transitions, 305 flow [2023-11-24 21:43:34,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 21:43:34,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:34,031 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:34,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:43:34,031 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:43:34,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:34,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1069008651, now seen corresponding path program 1 times [2023-11-24 21:43:34,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:34,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115661314] [2023-11-24 21:43:34,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:34,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-24 21:43:34,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:34,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115661314] [2023-11-24 21:43:34,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115661314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:34,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:34,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:34,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292954007] [2023-11-24 21:43:34,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:34,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:43:34,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:34,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:43:34,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:34,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 139 [2023-11-24 21:43:34,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 132 transitions, 305 flow. Second operand has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states 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 21:43:34,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:34,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 139 [2023-11-24 21:43:34,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:34,849 INFO L124 PetriNetUnfolderBase]: 1363/3327 cut-off events. [2023-11-24 21:43:34,849 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-24 21:43:34,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5365 conditions, 3327 events. 1363/3327 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 24512 event pairs, 727 based on Foata normal form. 0/2522 useless extension candidates. Maximal degree in co-relation 5357. Up to 1966 conditions per place. [2023-11-24 21:43:34,883 INFO L140 encePairwiseOnDemand]: 135/139 looper letters, 64 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2023-11-24 21:43:34,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 130 transitions, 433 flow [2023-11-24 21:43:34,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:43:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 352 transitions. [2023-11-24 21:43:34,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6330935251798561 [2023-11-24 21:43:34,886 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 352 transitions. [2023-11-24 21:43:34,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 352 transitions. [2023-11-24 21:43:34,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:34,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 352 transitions. [2023-11-24 21:43:34,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states 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 21:43:34,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 21:43:34,890 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 21:43:34,890 INFO L175 Difference]: Start difference. First operand has 124 places, 132 transitions, 305 flow. Second operand 4 states and 352 transitions. [2023-11-24 21:43:34,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 130 transitions, 433 flow [2023-11-24 21:43:34,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 130 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:34,894 INFO L231 Difference]: Finished difference. Result has 123 places, 130 transitions, 302 flow [2023-11-24 21:43:34,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=302, PETRI_PLACES=123, PETRI_TRANSITIONS=130} [2023-11-24 21:43:34,898 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 0 predicate places. [2023-11-24 21:43:34,898 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 130 transitions, 302 flow [2023-11-24 21:43:34,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states 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 21:43:34,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:34,899 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:34,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:43:34,899 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:43:34,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:34,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1069008652, now seen corresponding path program 1 times [2023-11-24 21:43:34,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:34,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537915347] [2023-11-24 21:43:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:34,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-24 21:43:35,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:35,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537915347] [2023-11-24 21:43:35,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537915347] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:35,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806531007] [2023-11-24 21:43:35,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:35,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:35,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:35,476 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:35,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:43:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:35,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:43:35,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:35,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:35,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:35,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:43:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-24 21:43:35,849 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:35,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806531007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:35,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:43:35,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 21:43:35,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074953455] [2023-11-24 21:43:35,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:35,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:35,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:35,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:35,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:43:35,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 139 [2023-11-24 21:43:35,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 130 transitions, 302 flow. Second operand has 4 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 21:43:35,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:35,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 139 [2023-11-24 21:43:35,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:36,443 INFO L124 PetriNetUnfolderBase]: 1321/3202 cut-off events. [2023-11-24 21:43:36,444 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-24 21:43:36,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5171 conditions, 3202 events. 1321/3202 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 23265 event pairs, 701 based on Foata normal form. 27/2456 useless extension candidates. Maximal degree in co-relation 5163. Up to 1918 conditions per place. [2023-11-24 21:43:36,469 INFO L140 encePairwiseOnDemand]: 136/139 looper letters, 63 selfloop transitions, 1 changer transitions 0/128 dead transitions. [2023-11-24 21:43:36,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 128 transitions, 426 flow [2023-11-24 21:43:36,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:36,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 289 transitions. [2023-11-24 21:43:36,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6930455635491607 [2023-11-24 21:43:36,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 289 transitions. [2023-11-24 21:43:36,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 289 transitions. [2023-11-24 21:43:36,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:36,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 289 transitions. [2023-11-24 21:43:36,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states 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 21:43:36,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:36,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:36,476 INFO L175 Difference]: Start difference. First operand has 123 places, 130 transitions, 302 flow. Second operand 3 states and 289 transitions. [2023-11-24 21:43:36,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 128 transitions, 426 flow [2023-11-24 21:43:36,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 128 transitions, 423 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:36,481 INFO L231 Difference]: Finished difference. Result has 121 places, 128 transitions, 297 flow [2023-11-24 21:43:36,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=121, PETRI_TRANSITIONS=128} [2023-11-24 21:43:36,482 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -2 predicate places. [2023-11-24 21:43:36,482 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 128 transitions, 297 flow [2023-11-24 21:43:36,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 21:43:36,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:36,483 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:36,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:36,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-24 21:43:36,689 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:43:36,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:36,690 INFO L85 PathProgramCache]: Analyzing trace with hash -332046149, now seen corresponding path program 1 times [2023-11-24 21:43:36,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:36,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532144409] [2023-11-24 21:43:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:36,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-24 21:43:37,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:37,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532144409] [2023-11-24 21:43:37,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532144409] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:37,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588237531] [2023-11-24 21:43:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:37,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:37,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:37,122 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:37,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:43:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:37,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-24 21:43:37,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:37,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-24 21:43:37,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:37,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:43:37,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:37,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:37,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:37,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:43:37,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:37,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:43:37,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:37,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:37,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:37,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-24 21:43:37,513 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:43:37,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-24 21:43:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-24 21:43:37,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:37,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-11-24 21:43:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-24 21:43:38,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588237531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:38,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:38,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 21 [2023-11-24 21:43:38,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788252399] [2023-11-24 21:43:38,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:38,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-24 21:43:38,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:38,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-24 21:43:38,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2023-11-24 21:43:41,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 139 [2023-11-24 21:43:41,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 128 transitions, 297 flow. Second operand has 23 states, 23 states have (on average 75.3913043478261) internal successors, (1734), 23 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states 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 21:43:41,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:41,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 139 [2023-11-24 21:43:41,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:43,742 INFO L124 PetriNetUnfolderBase]: 3012/6750 cut-off events. [2023-11-24 21:43:43,742 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-24 21:43:43,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11246 conditions, 6750 events. 3012/6750 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 49676 event pairs, 464 based on Foata normal form. 0/5510 useless extension candidates. Maximal degree in co-relation 11238. Up to 1873 conditions per place. [2023-11-24 21:43:43,800 INFO L140 encePairwiseOnDemand]: 127/139 looper letters, 135 selfloop transitions, 15 changer transitions 0/210 dead transitions. [2023-11-24 21:43:43,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 210 transitions, 783 flow [2023-11-24 21:43:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 21:43:43,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-24 21:43:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1253 transitions. [2023-11-24 21:43:43,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6009592326139088 [2023-11-24 21:43:43,806 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1253 transitions. [2023-11-24 21:43:43,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1253 transitions. [2023-11-24 21:43:43,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:43,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1253 transitions. [2023-11-24 21:43:43,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 83.53333333333333) internal successors, (1253), 15 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states 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 21:43:43,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 139.0) internal successors, (2224), 16 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states 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 21:43:43,819 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 139.0) internal successors, (2224), 16 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states 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 21:43:43,820 INFO L175 Difference]: Start difference. First operand has 121 places, 128 transitions, 297 flow. Second operand 15 states and 1253 transitions. [2023-11-24 21:43:43,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 210 transitions, 783 flow [2023-11-24 21:43:43,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 210 transitions, 782 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:43:43,826 INFO L231 Difference]: Finished difference. Result has 134 places, 127 transitions, 339 flow [2023-11-24 21:43:43,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=339, PETRI_PLACES=134, PETRI_TRANSITIONS=127} [2023-11-24 21:43:43,827 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 11 predicate places. [2023-11-24 21:43:43,828 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 127 transitions, 339 flow [2023-11-24 21:43:43,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 75.3913043478261) internal successors, (1734), 23 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states 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 21:43:43,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:43,829 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:43,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:44,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 21:43:44,037 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:43:44,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:44,037 INFO L85 PathProgramCache]: Analyzing trace with hash -332046150, now seen corresponding path program 1 times [2023-11-24 21:43:44,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:44,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585548539] [2023-11-24 21:43:44,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:44,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-24 21:43:44,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:44,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585548539] [2023-11-24 21:43:44,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585548539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:44,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:44,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:44,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174115172] [2023-11-24 21:43:44,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:44,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:43:44,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:44,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:43:44,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:44,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 139 [2023-11-24 21:43:44,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 127 transitions, 339 flow. Second operand has 5 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 21:43:44,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:44,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 139 [2023-11-24 21:43:44,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:45,517 INFO L124 PetriNetUnfolderBase]: 2847/6338 cut-off events. [2023-11-24 21:43:45,517 INFO L125 PetriNetUnfolderBase]: For 524/534 co-relation queries the response was YES. [2023-11-24 21:43:45,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11012 conditions, 6338 events. 2847/6338 cut-off events. For 524/534 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 45890 event pairs, 1601 based on Foata normal form. 94/5244 useless extension candidates. Maximal degree in co-relation 11001. Up to 4128 conditions per place. [2023-11-24 21:43:45,565 INFO L140 encePairwiseOnDemand]: 128/139 looper letters, 63 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2023-11-24 21:43:45,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 119 transitions, 455 flow [2023-11-24 21:43:45,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:43:45,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:43:45,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 409 transitions. [2023-11-24 21:43:45,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884892086330935 [2023-11-24 21:43:45,568 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 409 transitions. [2023-11-24 21:43:45,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 409 transitions. [2023-11-24 21:43:45,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:45,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 409 transitions. [2023-11-24 21:43:45,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.8) internal successors, (409), 5 states have internal predecessors, (409), 0 states have call successors, (0), 0 states 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 21:43:45,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states 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 21:43:45,573 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states 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 21:43:45,573 INFO L175 Difference]: Start difference. First operand has 134 places, 127 transitions, 339 flow. Second operand 5 states and 409 transitions. [2023-11-24 21:43:45,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 119 transitions, 455 flow [2023-11-24 21:43:45,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 119 transitions, 438 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-24 21:43:45,578 INFO L231 Difference]: Finished difference. Result has 125 places, 119 transitions, 312 flow [2023-11-24 21:43:45,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=125, PETRI_TRANSITIONS=119} [2023-11-24 21:43:45,579 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 2 predicate places. [2023-11-24 21:43:45,579 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 119 transitions, 312 flow [2023-11-24 21:43:45,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 21:43:45,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:45,579 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:45,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:43:45,580 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:43:45,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:45,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1268723938, now seen corresponding path program 1 times [2023-11-24 21:43:45,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:45,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568949708] [2023-11-24 21:43:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:45,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-24 21:43:45,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:45,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568949708] [2023-11-24 21:43:45,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568949708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:45,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:45,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:45,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379629625] [2023-11-24 21:43:45,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:45,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:45,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:45,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:45,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:45,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 139 [2023-11-24 21:43:45,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 119 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 21:43:45,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:45,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 139 [2023-11-24 21:43:45,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:46,855 INFO L124 PetriNetUnfolderBase]: 2847/6012 cut-off events. [2023-11-24 21:43:46,855 INFO L125 PetriNetUnfolderBase]: For 519/529 co-relation queries the response was YES. [2023-11-24 21:43:46,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10681 conditions, 6012 events. 2847/6012 cut-off events. For 519/529 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 41229 event pairs, 1601 based on Foata normal form. 0/5150 useless extension candidates. Maximal degree in co-relation 10670. Up to 4128 conditions per place. [2023-11-24 21:43:46,901 INFO L140 encePairwiseOnDemand]: 129/139 looper letters, 64 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-11-24 21:43:46,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 111 transitions, 428 flow [2023-11-24 21:43:46,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:46,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:43:46,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 340 transitions. [2023-11-24 21:43:46,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6115107913669064 [2023-11-24 21:43:46,906 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 340 transitions. [2023-11-24 21:43:46,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 340 transitions. [2023-11-24 21:43:46,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:46,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 340 transitions. [2023-11-24 21:43:46,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states 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 21:43:46,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 21:43:46,910 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 21:43:46,910 INFO L175 Difference]: Start difference. First operand has 125 places, 119 transitions, 312 flow. Second operand 4 states and 340 transitions. [2023-11-24 21:43:46,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 111 transitions, 428 flow [2023-11-24 21:43:46,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 111 transitions, 423 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:43:46,914 INFO L231 Difference]: Finished difference. Result has 117 places, 111 transitions, 295 flow [2023-11-24 21:43:46,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=117, PETRI_TRANSITIONS=111} [2023-11-24 21:43:46,915 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -6 predicate places. [2023-11-24 21:43:46,916 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 111 transitions, 295 flow [2023-11-24 21:43:46,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 21:43:46,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:46,916 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:46,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:43:46,919 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:43:46,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:46,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1268723937, now seen corresponding path program 1 times [2023-11-24 21:43:46,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:46,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622367229] [2023-11-24 21:43:46,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:46,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-24 21:43:47,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:47,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622367229] [2023-11-24 21:43:47,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622367229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:47,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561614809] [2023-11-24 21:43:47,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:47,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:47,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:47,252 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:47,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:43:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:47,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-24 21:43:47,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-24 21:43:47,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:47,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-24 21:43:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-24 21:43:47,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561614809] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:47,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:47,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2023-11-24 21:43:47,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652348987] [2023-11-24 21:43:47,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:47,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-24 21:43:47,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:47,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-24 21:43:47,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-11-24 21:43:49,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 139 [2023-11-24 21:43:49,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 111 transitions, 295 flow. Second operand has 21 states, 21 states have (on average 77.33333333333333) internal successors, (1624), 21 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states 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 21:43:49,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:49,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 139 [2023-11-24 21:43:49,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:51,176 INFO L124 PetriNetUnfolderBase]: 4036/7690 cut-off events. [2023-11-24 21:43:51,177 INFO L125 PetriNetUnfolderBase]: For 623/648 co-relation queries the response was YES. [2023-11-24 21:43:51,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14135 conditions, 7690 events. 4036/7690 cut-off events. For 623/648 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 48470 event pairs, 1064 based on Foata normal form. 0/6470 useless extension candidates. Maximal degree in co-relation 14124. Up to 2079 conditions per place. [2023-11-24 21:43:51,229 INFO L140 encePairwiseOnDemand]: 124/139 looper letters, 148 selfloop transitions, 18 changer transitions 0/207 dead transitions. [2023-11-24 21:43:51,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 207 transitions, 847 flow [2023-11-24 21:43:51,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:43:51,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:43:51,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 924 transitions. [2023-11-24 21:43:51,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6647482014388489 [2023-11-24 21:43:51,233 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 924 transitions. [2023-11-24 21:43:51,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 924 transitions. [2023-11-24 21:43:51,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:51,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 924 transitions. [2023-11-24 21:43:51,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 92.4) internal successors, (924), 10 states have internal predecessors, (924), 0 states have call successors, (0), 0 states 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 21:43:51,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 139.0) internal successors, (1529), 11 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states 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 21:43:51,241 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 139.0) internal successors, (1529), 11 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states 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 21:43:51,241 INFO L175 Difference]: Start difference. First operand has 117 places, 111 transitions, 295 flow. Second operand 10 states and 924 transitions. [2023-11-24 21:43:51,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 207 transitions, 847 flow [2023-11-24 21:43:51,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 207 transitions, 844 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:51,248 INFO L231 Difference]: Finished difference. Result has 127 places, 116 transitions, 383 flow [2023-11-24 21:43:51,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=383, PETRI_PLACES=127, PETRI_TRANSITIONS=116} [2023-11-24 21:43:51,249 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 4 predicate places. [2023-11-24 21:43:51,249 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 116 transitions, 383 flow [2023-11-24 21:43:51,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 77.33333333333333) internal successors, (1624), 21 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states 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 21:43:51,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:51,251 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:51,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:51,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 21:43:51,456 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:43:51,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:51,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1842974631, now seen corresponding path program 1 times [2023-11-24 21:43:51,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:51,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452860670] [2023-11-24 21:43:51,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:51,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-24 21:43:51,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:51,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452860670] [2023-11-24 21:43:51,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452860670] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:51,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139439687] [2023-11-24 21:43:51,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:51,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:51,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:51,904 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:51,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:43:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:52,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-24 21:43:52,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-24 21:43:52,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:52,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-24 21:43:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-24 21:43:52,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139439687] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:52,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:52,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2023-11-24 21:43:52,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643576503] [2023-11-24 21:43:52,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:52,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-24 21:43:52,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:52,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-24 21:43:52,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-11-24 21:43:54,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 139 [2023-11-24 21:43:54,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 116 transitions, 383 flow. Second operand has 21 states, 21 states have (on average 77.47619047619048) internal successors, (1627), 21 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states 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 21:43:54,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:54,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 139 [2023-11-24 21:43:54,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:57,336 INFO L124 PetriNetUnfolderBase]: 7683/15142 cut-off events. [2023-11-24 21:43:57,337 INFO L125 PetriNetUnfolderBase]: For 5191/5469 co-relation queries the response was YES. [2023-11-24 21:43:57,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29383 conditions, 15142 events. 7683/15142 cut-off events. For 5191/5469 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 110544 event pairs, 1239 based on Foata normal form. 0/13061 useless extension candidates. Maximal degree in co-relation 29369. Up to 4614 conditions per place. [2023-11-24 21:43:57,473 INFO L140 encePairwiseOnDemand]: 127/139 looper letters, 152 selfloop transitions, 15 changer transitions 0/208 dead transitions. [2023-11-24 21:43:57,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 208 transitions, 1041 flow [2023-11-24 21:43:57,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:43:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:43:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 904 transitions. [2023-11-24 21:43:57,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6503597122302158 [2023-11-24 21:43:57,477 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 904 transitions. [2023-11-24 21:43:57,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 904 transitions. [2023-11-24 21:43:57,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:57,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 904 transitions. [2023-11-24 21:43:57,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 90.4) internal successors, (904), 10 states have internal predecessors, (904), 0 states have call successors, (0), 0 states 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 21:43:57,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 139.0) internal successors, (1529), 11 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states 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 21:43:57,485 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 139.0) internal successors, (1529), 11 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states 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 21:43:57,485 INFO L175 Difference]: Start difference. First operand has 127 places, 116 transitions, 383 flow. Second operand 10 states and 904 transitions. [2023-11-24 21:43:57,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 208 transitions, 1041 flow [2023-11-24 21:43:57,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 208 transitions, 1014 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-24 21:43:57,496 INFO L231 Difference]: Finished difference. Result has 129 places, 115 transitions, 403 flow [2023-11-24 21:43:57,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=403, PETRI_PLACES=129, PETRI_TRANSITIONS=115} [2023-11-24 21:43:57,497 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 6 predicate places. [2023-11-24 21:43:57,497 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 115 transitions, 403 flow [2023-11-24 21:43:57,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 77.47619047619048) internal successors, (1627), 21 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states 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 21:43:57,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:57,498 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:57,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-24 21:43:57,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:57,709 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:43:57,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:57,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1572047459, now seen corresponding path program 1 times [2023-11-24 21:43:57,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:57,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316268474] [2023-11-24 21:43:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:57,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-24 21:43:58,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:58,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316268474] [2023-11-24 21:43:58,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316268474] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:58,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45318276] [2023-11-24 21:43:58,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:58,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:58,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:58,381 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:58,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fe4fb15-18bd-4958-9390-0f5bf9a1f310/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:43:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:58,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-24 21:43:58,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:58,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-24 21:43:58,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:58,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:43:58,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:58,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:58,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:58,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:43:58,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:58,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:58,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:58,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:43:58,817 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-24 21:43:58,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-24 21:43:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-24 21:43:59,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-24 21:43:59,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45318276] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:59,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:43:59,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 9] total 22 [2023-11-24 21:43:59,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159830096] [2023-11-24 21:43:59,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:59,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:43:59,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:59,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:43:59,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2023-11-24 21:44:00,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 139 [2023-11-24 21:44:00,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 115 transitions, 403 flow. Second operand has 10 states, 10 states have (on average 77.3) internal successors, (773), 10 states have internal predecessors, (773), 0 states have call successors, (0), 0 states 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 21:44:00,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:00,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 139 [2023-11-24 21:44:00,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand