./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr-deref.i --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_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme --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 12bbf3623faa1d8cb0ae406b9406d293839854c20d2fb62622ec841c419248fb --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:45:42,911 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:45:43,009 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:45:43,016 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:45:43,017 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:45:43,043 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:45:43,044 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:45:43,045 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:45:43,046 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:45:43,046 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:45:43,047 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:45:43,047 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:45:43,048 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:45:43,049 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:45:43,050 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:45:43,050 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:45:43,051 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:45:43,051 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:45:43,052 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:45:43,053 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:45:43,053 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:45:43,054 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:45:43,055 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:45:43,055 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:45:43,056 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:45:43,056 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:45:43,057 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:45:43,057 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:45:43,058 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:45:43,059 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:45:43,059 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:45:43,060 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:45:43,060 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:45:43,061 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:45:43,061 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:45:43,061 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:45:43,062 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:45:43,062 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:45:43,062 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:45:43,063 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:45:43,063 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:45:43,063 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_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 12bbf3623faa1d8cb0ae406b9406d293839854c20d2fb62622ec841c419248fb [2023-11-26 11:45:43,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:45:43,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:45:43,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:45:43,383 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:45:43,384 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:45:43,385 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr-deref.i [2023-11-26 11:45:46,574 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:45:46,945 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:45:46,946 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr-deref.i [2023-11-26 11:45:46,973 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/data/bd9533514/a3adeeeb597842429f998eea8d775c1a/FLAG51fb7fd53 [2023-11-26 11:45:46,993 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/data/bd9533514/a3adeeeb597842429f998eea8d775c1a [2023-11-26 11:45:46,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:45:46,998 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:45:46,999 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:45:46,999 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:45:47,004 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:45:47,005 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:45:46" (1/1) ... [2023-11-26 11:45:47,006 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d3d77d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:47, skipping insertion in model container [2023-11-26 11:45:47,007 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:45:46" (1/1) ... [2023-11-26 11:45:47,066 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:45:47,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:45:47,728 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:45:47,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:45:47,908 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:45:47,908 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:47 WrapperNode [2023-11-26 11:45:47,909 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:45:47,910 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:45:47,910 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:45:47,910 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:45:47,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:47" (1/1) ... [2023-11-26 11:45:47,940 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:47" (1/1) ... [2023-11-26 11:45:47,972 INFO L138 Inliner]: procedures = 371, calls = 31, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 122 [2023-11-26 11:45:47,972 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:45:47,973 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:45:47,973 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:45:47,973 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:45:47,985 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:47" (1/1) ... [2023-11-26 11:45:47,986 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:47" (1/1) ... [2023-11-26 11:45:47,991 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:47" (1/1) ... [2023-11-26 11:45:48,015 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [6, 1, 14]. 67 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0, 0]. The 14 writes are split as follows [3, 1, 10]. [2023-11-26 11:45:48,015 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:47" (1/1) ... [2023-11-26 11:45:48,015 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:47" (1/1) ... [2023-11-26 11:45:48,030 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:47" (1/1) ... [2023-11-26 11:45:48,034 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:47" (1/1) ... [2023-11-26 11:45:48,037 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:47" (1/1) ... [2023-11-26 11:45:48,039 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:47" (1/1) ... [2023-11-26 11:45:48,044 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:45:48,045 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:45:48,045 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:45:48,046 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:45:48,047 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:47" (1/1) ... [2023-11-26 11:45:48,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:45:48,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:48,105 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:45:48,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:45:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:45:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 11:45:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 11:45:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-26 11:45:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:45:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 11:45:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:45:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:45:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:45:48,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:45:48,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:45:48,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:45:48,162 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 11:45:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:45:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:45:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 11:45:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 11:45:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-26 11:45:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-26 11:45:48,164 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-26 11:45:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:45:48,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:45:48,168 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:45:48,481 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:45:48,483 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:45:48,990 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:45:49,265 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:45:49,265 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:45:49,267 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:45:49 BoogieIcfgContainer [2023-11-26 11:45:49,267 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:45:49,272 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:45:49,272 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:45:49,276 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:45:49,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:45:46" (1/3) ... [2023-11-26 11:45:49,278 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65061976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:45:49, skipping insertion in model container [2023-11-26 11:45:49,278 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:47" (2/3) ... [2023-11-26 11:45:49,280 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65061976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:45:49, skipping insertion in model container [2023-11-26 11:45:49,280 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:45:49" (3/3) ... [2023-11-26 11:45:49,284 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_19-nested_nr-deref.i [2023-11-26 11:45:49,306 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:45:49,306 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-26 11:45:49,306 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:45:49,389 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-26 11:45:49,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 74 transitions, 152 flow [2023-11-26 11:45:49,509 INFO L124 PetriNetUnfolderBase]: 1/73 cut-off events. [2023-11-26 11:45:49,509 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:45:49,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 73 events. 1/73 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 168 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2023-11-26 11:45:49,512 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 74 transitions, 152 flow [2023-11-26 11:45:49,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 73 transitions, 149 flow [2023-11-26 11:45:49,528 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:45:49,536 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;@78947668, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:45:49,537 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-26 11:45:49,540 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:45:49,541 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-26 11:45:49,541 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:45:49,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:49,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:45:49,543 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:45:49,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:49,553 INFO L85 PathProgramCache]: Analyzing trace with hash 385122, now seen corresponding path program 1 times [2023-11-26 11:45:49,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:49,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606568811] [2023-11-26 11:45:49,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:49,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:49,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:49,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606568811] [2023-11-26 11:45:49,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606568811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:49,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:49,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:45:49,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160339510] [2023-11-26 11:45:49,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:49,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:49,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:49,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:49,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:49,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2023-11-26 11:45:49,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:49,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:49,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2023-11-26 11:45:49,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:50,217 INFO L124 PetriNetUnfolderBase]: 64/270 cut-off events. [2023-11-26 11:45:50,217 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 11:45:50,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 270 events. 64/270 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1235 event pairs, 63 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 377. Up to 153 conditions per place. [2023-11-26 11:45:50,223 INFO L140 encePairwiseOnDemand]: 71/74 looper letters, 25 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-11-26 11:45:50,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 205 flow [2023-11-26 11:45:50,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:50,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:45:50,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2023-11-26 11:45:50,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7747747747747747 [2023-11-26 11:45:50,240 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 172 transitions. [2023-11-26 11:45:50,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 172 transitions. [2023-11-26 11:45:50,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:50,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 172 transitions. [2023-11-26 11:45:50,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:50,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:50,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:50,256 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 149 flow. Second operand 3 states and 172 transitions. [2023-11-26 11:45:50,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 205 flow [2023-11-26 11:45:50,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:45:50,264 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 160 flow [2023-11-26 11:45:50,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2023-11-26 11:45:50,271 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 2 predicate places. [2023-11-26 11:45:50,271 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 160 flow [2023-11-26 11:45:50,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:50,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:50,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-26 11:45:50,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:45:50,273 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:45:50,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:50,274 INFO L85 PathProgramCache]: Analyzing trace with hash 11938264, now seen corresponding path program 1 times [2023-11-26 11:45:50,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:50,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362242466] [2023-11-26 11:45:50,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:50,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:50,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:50,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362242466] [2023-11-26 11:45:50,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362242466] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:50,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740387058] [2023-11-26 11:45:50,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:50,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:50,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:50,398 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:50,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:45:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:50,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:45:50,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:50,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:50,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740387058] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:50,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:45:50,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-26 11:45:50,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711206467] [2023-11-26 11:45:50,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:50,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:45:50,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:50,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:45:50,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:45:50,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2023-11-26 11:45:50,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:50,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:50,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2023-11-26 11:45:50,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:50,850 INFO L124 PetriNetUnfolderBase]: 64/273 cut-off events. [2023-11-26 11:45:50,851 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:45:50,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 273 events. 64/273 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1230 event pairs, 63 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 432. Up to 153 conditions per place. [2023-11-26 11:45:50,862 INFO L140 encePairwiseOnDemand]: 71/74 looper letters, 25 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2023-11-26 11:45:50,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 77 transitions, 232 flow [2023-11-26 11:45:50,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:45:50,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:45:50,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 321 transitions. [2023-11-26 11:45:50,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.722972972972973 [2023-11-26 11:45:50,878 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 321 transitions. [2023-11-26 11:45:50,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 321 transitions. [2023-11-26 11:45:50,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:50,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 321 transitions. [2023-11-26 11:45:50,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 53.5) internal successors, (321), 6 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:50,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:50,895 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:50,895 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 160 flow. Second operand 6 states and 321 transitions. [2023-11-26 11:45:50,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 77 transitions, 232 flow [2023-11-26 11:45:50,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 77 transitions, 228 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 11:45:50,900 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 192 flow [2023-11-26 11:45:50,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2023-11-26 11:45:50,902 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 9 predicate places. [2023-11-26 11:45:50,903 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 192 flow [2023-11-26 11:45:50,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:50,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:50,904 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-26 11:45:50,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:45:51,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:51,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:45:51,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:51,116 INFO L85 PathProgramCache]: Analyzing trace with hash -829977118, now seen corresponding path program 2 times [2023-11-26 11:45:51,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:51,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314901482] [2023-11-26 11:45:51,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:51,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:45:51,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:51,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314901482] [2023-11-26 11:45:51,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314901482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:51,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:51,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:45:51,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250752952] [2023-11-26 11:45:51,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:51,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:51,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:51,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:51,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:51,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 74 [2023-11-26 11:45:51,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 77 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:51,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:51,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 74 [2023-11-26 11:45:51,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:51,460 INFO L124 PetriNetUnfolderBase]: 64/269 cut-off events. [2023-11-26 11:45:51,460 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:45:51,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 269 events. 64/269 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1209 event pairs, 63 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 421. Up to 155 conditions per place. [2023-11-26 11:45:51,464 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 28 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2023-11-26 11:45:51,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 73 transitions, 248 flow [2023-11-26 11:45:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:45:51,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2023-11-26 11:45:51,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7117117117117117 [2023-11-26 11:45:51,467 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 158 transitions. [2023-11-26 11:45:51,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 158 transitions. [2023-11-26 11:45:51,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:51,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 158 transitions. [2023-11-26 11:45:51,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:51,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:51,470 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:51,471 INFO L175 Difference]: Start difference. First operand has 85 places, 77 transitions, 192 flow. Second operand 3 states and 158 transitions. [2023-11-26 11:45:51,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 73 transitions, 248 flow [2023-11-26 11:45:51,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 73 transitions, 234 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-26 11:45:51,475 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 178 flow [2023-11-26 11:45:51,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2023-11-26 11:45:51,477 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 6 predicate places. [2023-11-26 11:45:51,477 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 178 flow [2023-11-26 11:45:51,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:51,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:51,478 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-26 11:45:51,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:45:51,478 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:45:51,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:51,479 INFO L85 PathProgramCache]: Analyzing trace with hash -829977117, now seen corresponding path program 1 times [2023-11-26 11:45:51,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:51,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852306859] [2023-11-26 11:45:51,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:51,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:51,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:51,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852306859] [2023-11-26 11:45:51,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852306859] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:51,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325088499] [2023-11-26 11:45:51,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:51,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:51,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:51,722 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:51,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:45:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:51,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:45:51,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:51,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:51,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325088499] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:51,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:45:51,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-26 11:45:51,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885479489] [2023-11-26 11:45:51,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:51,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:45:51,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:51,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:45:51,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:45:51,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2023-11-26 11:45:51,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 178 flow. Second operand has 13 states, 13 states have (on average 49.07692307692308) internal successors, (638), 13 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:51,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:51,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2023-11-26 11:45:51,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:52,109 INFO L124 PetriNetUnfolderBase]: 64/275 cut-off events. [2023-11-26 11:45:52,110 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-11-26 11:45:52,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 275 events. 64/275 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1221 event pairs, 63 based on Foata normal form. 6/222 useless extension candidates. Maximal degree in co-relation 423. Up to 153 conditions per place. [2023-11-26 11:45:52,113 INFO L140 encePairwiseOnDemand]: 71/74 looper letters, 25 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2023-11-26 11:45:52,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 79 transitions, 286 flow [2023-11-26 11:45:52,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:45:52,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 11:45:52,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 618 transitions. [2023-11-26 11:45:52,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6959459459459459 [2023-11-26 11:45:52,117 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 618 transitions. [2023-11-26 11:45:52,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 618 transitions. [2023-11-26 11:45:52,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:52,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 618 transitions. [2023-11-26 11:45:52,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 51.5) internal successors, (618), 12 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:52,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:52,127 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:52,127 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 178 flow. Second operand 12 states and 618 transitions. [2023-11-26 11:45:52,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 79 transitions, 286 flow [2023-11-26 11:45:52,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 79 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:45:52,136 INFO L231 Difference]: Finished difference. Result has 97 places, 79 transitions, 254 flow [2023-11-26 11:45:52,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=254, PETRI_PLACES=97, PETRI_TRANSITIONS=79} [2023-11-26 11:45:52,138 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 21 predicate places. [2023-11-26 11:45:52,139 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 79 transitions, 254 flow [2023-11-26 11:45:52,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 49.07692307692308) internal successors, (638), 13 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:52,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:52,145 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-26 11:45:52,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:52,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:52,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:45:52,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:52,356 INFO L85 PathProgramCache]: Analyzing trace with hash 2110056995, now seen corresponding path program 2 times [2023-11-26 11:45:52,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:52,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443058831] [2023-11-26 11:45:52,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:52,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:45:52,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:52,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443058831] [2023-11-26 11:45:52,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443058831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:52,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:52,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:45:52,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154575688] [2023-11-26 11:45:52,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:52,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:52,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:52,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:52,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:52,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 74 [2023-11-26 11:45:52,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 79 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:52,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:52,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 74 [2023-11-26 11:45:52,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:52,721 INFO L124 PetriNetUnfolderBase]: 64/271 cut-off events. [2023-11-26 11:45:52,722 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-26 11:45:52,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 271 events. 64/271 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1205 event pairs, 63 based on Foata normal form. 2/216 useless extension candidates. Maximal degree in co-relation 421. Up to 161 conditions per place. [2023-11-26 11:45:52,725 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 32 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-11-26 11:45:52,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 75 transitions, 318 flow [2023-11-26 11:45:52,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:52,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:45:52,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-26 11:45:52,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7297297297297297 [2023-11-26 11:45:52,727 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-26 11:45:52,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-26 11:45:52,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:52,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-26 11:45:52,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:52,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:52,730 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:52,730 INFO L175 Difference]: Start difference. First operand has 97 places, 79 transitions, 254 flow. Second operand 3 states and 162 transitions. [2023-11-26 11:45:52,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 75 transitions, 318 flow [2023-11-26 11:45:52,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 75 transitions, 270 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-26 11:45:52,736 INFO L231 Difference]: Finished difference. Result has 90 places, 75 transitions, 206 flow [2023-11-26 11:45:52,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=90, PETRI_TRANSITIONS=75} [2023-11-26 11:45:52,737 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 14 predicate places. [2023-11-26 11:45:52,738 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 75 transitions, 206 flow [2023-11-26 11:45:52,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:52,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:52,738 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-26 11:45:52,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:45:52,739 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:45:52,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:52,739 INFO L85 PathProgramCache]: Analyzing trace with hash 540218211, now seen corresponding path program 1 times [2023-11-26 11:45:52,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:52,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804105889] [2023-11-26 11:45:52,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:52,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:45:53,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:53,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804105889] [2023-11-26 11:45:53,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804105889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:53,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:53,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:45:53,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900406860] [2023-11-26 11:45:53,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:53,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:45:53,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:53,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:45:53,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:45:53,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 74 [2023-11-26 11:45:53,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 75 transitions, 206 flow. Second operand has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:53,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:53,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 74 [2023-11-26 11:45:53,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:53,561 INFO L124 PetriNetUnfolderBase]: 77/321 cut-off events. [2023-11-26 11:45:53,561 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-26 11:45:53,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 321 events. 77/321 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1491 event pairs, 55 based on Foata normal form. 1/261 useless extension candidates. Maximal degree in co-relation 512. Up to 145 conditions per place. [2023-11-26 11:45:53,565 INFO L140 encePairwiseOnDemand]: 67/74 looper letters, 51 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-11-26 11:45:53,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 86 transitions, 336 flow [2023-11-26 11:45:53,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:45:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:45:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 212 transitions. [2023-11-26 11:45:53,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7162162162162162 [2023-11-26 11:45:53,567 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 212 transitions. [2023-11-26 11:45:53,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 212 transitions. [2023-11-26 11:45:53,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:53,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 212 transitions. [2023-11-26 11:45:53,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:53,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:53,570 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:53,570 INFO L175 Difference]: Start difference. First operand has 90 places, 75 transitions, 206 flow. Second operand 4 states and 212 transitions. [2023-11-26 11:45:53,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 86 transitions, 336 flow [2023-11-26 11:45:53,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 86 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:45:53,576 INFO L231 Difference]: Finished difference. Result has 90 places, 73 transitions, 209 flow [2023-11-26 11:45:53,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=90, PETRI_TRANSITIONS=73} [2023-11-26 11:45:53,577 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 14 predicate places. [2023-11-26 11:45:53,577 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 73 transitions, 209 flow [2023-11-26 11:45:53,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:53,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:53,578 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-26 11:45:53,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:45:53,578 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:45:53,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:53,579 INFO L85 PathProgramCache]: Analyzing trace with hash 540218212, now seen corresponding path program 1 times [2023-11-26 11:45:53,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:53,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552742127] [2023-11-26 11:45:53,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:53,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:45:53,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:53,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552742127] [2023-11-26 11:45:53,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552742127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:53,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:53,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:45:53,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797135887] [2023-11-26 11:45:53,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:53,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:45:53,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:53,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:45:53,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:45:54,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 74 [2023-11-26 11:45:54,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 73 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:54,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:54,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 74 [2023-11-26 11:45:54,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:54,282 INFO L124 PetriNetUnfolderBase]: 75/310 cut-off events. [2023-11-26 11:45:54,283 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-11-26 11:45:54,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580 conditions, 310 events. 75/310 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1460 event pairs, 45 based on Foata normal form. 9/263 useless extension candidates. Maximal degree in co-relation 526. Up to 112 conditions per place. [2023-11-26 11:45:54,286 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 52 selfloop transitions, 5 changer transitions 0/89 dead transitions. [2023-11-26 11:45:54,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 89 transitions, 360 flow [2023-11-26 11:45:54,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:45:54,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:45:54,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 255 transitions. [2023-11-26 11:45:54,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6891891891891891 [2023-11-26 11:45:54,289 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 255 transitions. [2023-11-26 11:45:54,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 255 transitions. [2023-11-26 11:45:54,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:54,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 255 transitions. [2023-11-26 11:45:54,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:54,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:54,292 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:54,292 INFO L175 Difference]: Start difference. First operand has 90 places, 73 transitions, 209 flow. Second operand 5 states and 255 transitions. [2023-11-26 11:45:54,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 89 transitions, 360 flow [2023-11-26 11:45:54,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 89 transitions, 358 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:45:54,297 INFO L231 Difference]: Finished difference. Result has 91 places, 72 transitions, 222 flow [2023-11-26 11:45:54,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=222, PETRI_PLACES=91, PETRI_TRANSITIONS=72} [2023-11-26 11:45:54,298 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 15 predicate places. [2023-11-26 11:45:54,298 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 72 transitions, 222 flow [2023-11-26 11:45:54,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:54,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:54,299 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:54,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:45:54,299 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:45:54,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:54,300 INFO L85 PathProgramCache]: Analyzing trace with hash -525008228, now seen corresponding path program 1 times [2023-11-26 11:45:54,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:54,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511243447] [2023-11-26 11:45:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:54,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:54,627 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:45:54,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:54,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511243447] [2023-11-26 11:45:54,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511243447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:54,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:54,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:45:54,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818102330] [2023-11-26 11:45:54,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:54,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:45:54,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:54,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:45:54,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:45:55,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 74 [2023-11-26 11:45:55,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 72 transitions, 222 flow. Second operand has 7 states, 7 states have (on average 40.42857142857143) internal successors, (283), 7 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:55,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:55,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 74 [2023-11-26 11:45:55,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:55,276 INFO L124 PetriNetUnfolderBase]: 73/312 cut-off events. [2023-11-26 11:45:55,276 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-26 11:45:55,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 312 events. 73/312 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1478 event pairs, 50 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 582. Up to 107 conditions per place. [2023-11-26 11:45:55,280 INFO L140 encePairwiseOnDemand]: 65/74 looper letters, 43 selfloop transitions, 7 changer transitions 0/78 dead transitions. [2023-11-26 11:45:55,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 78 transitions, 336 flow [2023-11-26 11:45:55,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:45:55,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:45:55,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 313 transitions. [2023-11-26 11:45:55,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6042471042471043 [2023-11-26 11:45:55,282 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 313 transitions. [2023-11-26 11:45:55,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 313 transitions. [2023-11-26 11:45:55,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:55,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 313 transitions. [2023-11-26 11:45:55,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 44.714285714285715) internal successors, (313), 7 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:55,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:55,286 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:55,286 INFO L175 Difference]: Start difference. First operand has 91 places, 72 transitions, 222 flow. Second operand 7 states and 313 transitions. [2023-11-26 11:45:55,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 78 transitions, 336 flow [2023-11-26 11:45:55,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 78 transitions, 329 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:45:55,291 INFO L231 Difference]: Finished difference. Result has 92 places, 70 transitions, 225 flow [2023-11-26 11:45:55,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=225, PETRI_PLACES=92, PETRI_TRANSITIONS=70} [2023-11-26 11:45:55,295 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 16 predicate places. [2023-11-26 11:45:55,295 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 70 transitions, 225 flow [2023-11-26 11:45:55,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.42857142857143) internal successors, (283), 7 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:55,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:55,296 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:55,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:45:55,296 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:45:55,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:55,297 INFO L85 PathProgramCache]: Analyzing trace with hash -525008227, now seen corresponding path program 1 times [2023-11-26 11:45:55,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:55,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750932545] [2023-11-26 11:45:55,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:55,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:45:55,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:55,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750932545] [2023-11-26 11:45:55,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750932545] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:55,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:55,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:45:55,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870432948] [2023-11-26 11:45:55,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:55,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:45:55,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:55,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:45:55,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:45:56,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 74 [2023-11-26 11:45:56,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 70 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 37.42857142857143) internal successors, (262), 7 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:56,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:56,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 74 [2023-11-26 11:45:56,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:56,663 INFO L124 PetriNetUnfolderBase]: 73/301 cut-off events. [2023-11-26 11:45:56,663 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2023-11-26 11:45:56,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 301 events. 73/301 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1418 event pairs, 52 based on Foata normal form. 1/249 useless extension candidates. Maximal degree in co-relation 569. Up to 136 conditions per place. [2023-11-26 11:45:56,667 INFO L140 encePairwiseOnDemand]: 65/74 looper letters, 39 selfloop transitions, 8 changer transitions 3/77 dead transitions. [2023-11-26 11:45:56,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 77 transitions, 344 flow [2023-11-26 11:45:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:45:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:45:56,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 291 transitions. [2023-11-26 11:45:56,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5617760617760618 [2023-11-26 11:45:56,670 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 291 transitions. [2023-11-26 11:45:56,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 291 transitions. [2023-11-26 11:45:56,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:56,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 291 transitions. [2023-11-26 11:45:56,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 41.57142857142857) internal successors, (291), 7 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) [2023-11-26 11:45:56,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:56,675 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:56,675 INFO L175 Difference]: Start difference. First operand has 92 places, 70 transitions, 225 flow. Second operand 7 states and 291 transitions. [2023-11-26 11:45:56,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 77 transitions, 344 flow [2023-11-26 11:45:56,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 77 transitions, 330 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 11:45:56,679 INFO L231 Difference]: Finished difference. Result has 90 places, 68 transitions, 223 flow [2023-11-26 11:45:56,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=223, PETRI_PLACES=90, PETRI_TRANSITIONS=68} [2023-11-26 11:45:56,681 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 14 predicate places. [2023-11-26 11:45:56,681 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 68 transitions, 223 flow [2023-11-26 11:45:56,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.42857142857143) internal successors, (262), 7 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:56,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:56,682 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:56,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:45:56,682 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:45:56,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:56,683 INFO L85 PathProgramCache]: Analyzing trace with hash -2021718729, now seen corresponding path program 1 times [2023-11-26 11:45:56,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:56,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459191767] [2023-11-26 11:45:56,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:56,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:45:56,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:56,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459191767] [2023-11-26 11:45:56,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459191767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:56,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:56,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:45:56,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339340829] [2023-11-26 11:45:56,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:56,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:45:56,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:56,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:45:56,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:45:57,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 74 [2023-11-26 11:45:57,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 68 transitions, 223 flow. Second operand has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:57,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:57,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 74 [2023-11-26 11:45:57,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:57,330 INFO L124 PetriNetUnfolderBase]: 73/307 cut-off events. [2023-11-26 11:45:57,331 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2023-11-26 11:45:57,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 307 events. 73/307 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1471 event pairs, 65 based on Foata normal form. 1/252 useless extension candidates. Maximal degree in co-relation 585. Up to 184 conditions per place. [2023-11-26 11:45:57,335 INFO L140 encePairwiseOnDemand]: 67/74 looper letters, 33 selfloop transitions, 6 changer transitions 0/67 dead transitions. [2023-11-26 11:45:57,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 67 transitions, 299 flow [2023-11-26 11:45:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:45:57,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:45:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 242 transitions. [2023-11-26 11:45:57,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654054054054054 [2023-11-26 11:45:57,338 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 242 transitions. [2023-11-26 11:45:57,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 242 transitions. [2023-11-26 11:45:57,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:57,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 242 transitions. [2023-11-26 11:45:57,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:57,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:57,343 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:57,344 INFO L175 Difference]: Start difference. First operand has 90 places, 68 transitions, 223 flow. Second operand 5 states and 242 transitions. [2023-11-26 11:45:57,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 67 transitions, 299 flow [2023-11-26 11:45:57,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 67 transitions, 283 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 11:45:57,348 INFO L231 Difference]: Finished difference. Result has 87 places, 67 transitions, 217 flow [2023-11-26 11:45:57,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=87, PETRI_TRANSITIONS=67} [2023-11-26 11:45:57,350 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 11 predicate places. [2023-11-26 11:45:57,350 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 67 transitions, 217 flow [2023-11-26 11:45:57,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:57,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:57,351 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:57,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:45:57,351 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:45:57,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:57,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2021718730, now seen corresponding path program 1 times [2023-11-26 11:45:57,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:57,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175382795] [2023-11-26 11:45:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:57,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:45:57,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:57,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175382795] [2023-11-26 11:45:57,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175382795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:57,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:57,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:45:57,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838768723] [2023-11-26 11:45:57,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:57,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:45:57,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:57,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:45:57,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:45:57,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 74 [2023-11-26 11:45:57,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 67 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:57,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:57,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 74 [2023-11-26 11:45:57,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:57,864 INFO L124 PetriNetUnfolderBase]: 73/306 cut-off events. [2023-11-26 11:45:57,865 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-11-26 11:45:57,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 306 events. 73/306 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1456 event pairs, 65 based on Foata normal form. 1/251 useless extension candidates. Maximal degree in co-relation 564. Up to 184 conditions per place. [2023-11-26 11:45:57,868 INFO L140 encePairwiseOnDemand]: 67/74 looper letters, 35 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2023-11-26 11:45:57,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 66 transitions, 297 flow [2023-11-26 11:45:57,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:45:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:45:57,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2023-11-26 11:45:57,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324324324324324 [2023-11-26 11:45:57,871 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 234 transitions. [2023-11-26 11:45:57,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 234 transitions. [2023-11-26 11:45:57,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:57,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 234 transitions. [2023-11-26 11:45:57,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 46.8) internal successors, (234), 5 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) [2023-11-26 11:45:57,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:57,874 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:57,874 INFO L175 Difference]: Start difference. First operand has 87 places, 67 transitions, 217 flow. Second operand 5 states and 234 transitions. [2023-11-26 11:45:57,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 66 transitions, 297 flow [2023-11-26 11:45:57,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 66 transitions, 285 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:45:57,878 INFO L231 Difference]: Finished difference. Result has 86 places, 66 transitions, 215 flow [2023-11-26 11:45:57,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=215, PETRI_PLACES=86, PETRI_TRANSITIONS=66} [2023-11-26 11:45:57,879 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 10 predicate places. [2023-11-26 11:45:57,879 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 66 transitions, 215 flow [2023-11-26 11:45:57,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:57,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:57,880 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:57,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:45:57,880 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:45:57,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:57,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1751229261, now seen corresponding path program 1 times [2023-11-26 11:45:57,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:57,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7990308] [2023-11-26 11:45:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:57,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:45:58,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:58,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7990308] [2023-11-26 11:45:58,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7990308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:58,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:58,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:45:58,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405450128] [2023-11-26 11:45:58,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:58,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:45:58,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:58,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:45:58,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:45:58,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 74 [2023-11-26 11:45:58,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 66 transitions, 215 flow. Second operand has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:58,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:58,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 74 [2023-11-26 11:45:58,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:58,610 INFO L124 PetriNetUnfolderBase]: 73/307 cut-off events. [2023-11-26 11:45:58,610 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-11-26 11:45:58,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 307 events. 73/307 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1470 event pairs, 50 based on Foata normal form. 1/253 useless extension candidates. Maximal degree in co-relation 563. Up to 110 conditions per place. [2023-11-26 11:45:58,614 INFO L140 encePairwiseOnDemand]: 68/74 looper letters, 42 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2023-11-26 11:45:58,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 73 transitions, 325 flow [2023-11-26 11:45:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:45:58,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:45:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 224 transitions. [2023-11-26 11:45:58,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7567567567567568 [2023-11-26 11:45:58,616 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 224 transitions. [2023-11-26 11:45:58,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 224 transitions. [2023-11-26 11:45:58,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:58,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 224 transitions. [2023-11-26 11:45:58,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:58,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:58,620 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:58,620 INFO L175 Difference]: Start difference. First operand has 86 places, 66 transitions, 215 flow. Second operand 4 states and 224 transitions. [2023-11-26 11:45:58,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 73 transitions, 325 flow [2023-11-26 11:45:58,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 73 transitions, 313 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:45:58,624 INFO L231 Difference]: Finished difference. Result has 84 places, 65 transitions, 211 flow [2023-11-26 11:45:58,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=211, PETRI_PLACES=84, PETRI_TRANSITIONS=65} [2023-11-26 11:45:58,625 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 8 predicate places. [2023-11-26 11:45:58,625 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 65 transitions, 211 flow [2023-11-26 11:45:58,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:58,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:58,626 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:58,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 11:45:58,627 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:45:58,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:58,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1751229260, now seen corresponding path program 1 times [2023-11-26 11:45:58,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:58,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647559413] [2023-11-26 11:45:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:58,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:45:58,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:58,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647559413] [2023-11-26 11:45:58,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647559413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:58,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:58,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:45:58,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070815782] [2023-11-26 11:45:58,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:58,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:45:58,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:58,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:45:58,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:45:59,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 74 [2023-11-26 11:45:59,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 65 transitions, 211 flow. Second operand has 8 states, 8 states have (on average 44.625) internal successors, (357), 8 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:59,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:59,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 74 [2023-11-26 11:45:59,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:59,632 INFO L124 PetriNetUnfolderBase]: 73/306 cut-off events. [2023-11-26 11:45:59,632 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-26 11:45:59,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629 conditions, 306 events. 73/306 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1465 event pairs, 50 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 574. Up to 116 conditions per place. [2023-11-26 11:45:59,635 INFO L140 encePairwiseOnDemand]: 71/74 looper letters, 49 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-11-26 11:45:59,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 72 transitions, 329 flow [2023-11-26 11:45:59,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:59,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:45:59,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2023-11-26 11:45:59,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7612612612612613 [2023-11-26 11:45:59,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 169 transitions. [2023-11-26 11:45:59,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 169 transitions. [2023-11-26 11:45:59,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:59,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 169 transitions. [2023-11-26 11:45:59,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:59,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:59,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:59,640 INFO L175 Difference]: Start difference. First operand has 84 places, 65 transitions, 211 flow. Second operand 3 states and 169 transitions. [2023-11-26 11:45:59,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 72 transitions, 329 flow [2023-11-26 11:45:59,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 72 transitions, 319 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:45:59,644 INFO L231 Difference]: Finished difference. Result has 82 places, 64 transitions, 203 flow [2023-11-26 11:45:59,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=82, PETRI_TRANSITIONS=64} [2023-11-26 11:45:59,645 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 6 predicate places. [2023-11-26 11:45:59,645 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 64 transitions, 203 flow [2023-11-26 11:45:59,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 44.625) internal successors, (357), 8 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:59,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:59,646 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:59,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 11:45:59,646 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:45:59,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:59,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1791764171, now seen corresponding path program 1 times [2023-11-26 11:45:59,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:59,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962356290] [2023-11-26 11:45:59,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:59,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:45:59,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:59,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962356290] [2023-11-26 11:45:59,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962356290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:59,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:59,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:45:59,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468712469] [2023-11-26 11:45:59,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:59,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:59,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:59,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:59,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:59,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 74 [2023-11-26 11:45:59,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 64 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:59,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:59,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 74 [2023-11-26 11:45:59,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:00,009 INFO L124 PetriNetUnfolderBase]: 73/303 cut-off events. [2023-11-26 11:46:00,010 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-26 11:46:00,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 303 events. 73/303 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1437 event pairs, 58 based on Foata normal form. 9/266 useless extension candidates. Maximal degree in co-relation 564. Up to 173 conditions per place. [2023-11-26 11:46:00,013 INFO L140 encePairwiseOnDemand]: 70/74 looper letters, 44 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-11-26 11:46:00,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 70 transitions, 320 flow [2023-11-26 11:46:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:00,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:46:00,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2023-11-26 11:46:00,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7792792792792793 [2023-11-26 11:46:00,015 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 173 transitions. [2023-11-26 11:46:00,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 173 transitions. [2023-11-26 11:46:00,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:46:00,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 173 transitions. [2023-11-26 11:46:00,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:00,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:00,018 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:00,018 INFO L175 Difference]: Start difference. First operand has 82 places, 64 transitions, 203 flow. Second operand 3 states and 173 transitions. [2023-11-26 11:46:00,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 70 transitions, 320 flow [2023-11-26 11:46:00,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 70 transitions, 314 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:46:00,022 INFO L231 Difference]: Finished difference. Result has 80 places, 62 transitions, 201 flow [2023-11-26 11:46:00,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=80, PETRI_TRANSITIONS=62} [2023-11-26 11:46:00,023 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 4 predicate places. [2023-11-26 11:46:00,024 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 62 transitions, 201 flow [2023-11-26 11:46:00,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:00,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:00,024 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:00,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 11:46:00,025 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:46:00,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:00,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1791764170, now seen corresponding path program 1 times [2023-11-26 11:46:00,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:00,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127938605] [2023-11-26 11:46:00,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:00,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:46:00,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:00,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127938605] [2023-11-26 11:46:00,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127938605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:00,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:00,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:46:00,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727621393] [2023-11-26 11:46:00,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:00,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:00,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:00,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:00,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:00,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 74 [2023-11-26 11:46:00,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 62 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:00,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:46:00,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 74 [2023-11-26 11:46:00,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:00,363 INFO L124 PetriNetUnfolderBase]: 84/307 cut-off events. [2023-11-26 11:46:00,364 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2023-11-26 11:46:00,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 307 events. 84/307 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1390 event pairs, 60 based on Foata normal form. 9/275 useless extension candidates. Maximal degree in co-relation 611. Up to 185 conditions per place. [2023-11-26 11:46:00,367 INFO L140 encePairwiseOnDemand]: 68/74 looper letters, 47 selfloop transitions, 5 changer transitions 0/72 dead transitions. [2023-11-26 11:46:00,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 72 transitions, 336 flow [2023-11-26 11:46:00,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:00,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:46:00,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2023-11-26 11:46:00,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7882882882882883 [2023-11-26 11:46:00,369 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 175 transitions. [2023-11-26 11:46:00,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 175 transitions. [2023-11-26 11:46:00,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:46:00,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 175 transitions. [2023-11-26 11:46:00,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:00,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:00,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:00,371 INFO L175 Difference]: Start difference. First operand has 80 places, 62 transitions, 201 flow. Second operand 3 states and 175 transitions. [2023-11-26 11:46:00,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 72 transitions, 336 flow [2023-11-26 11:46:00,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 72 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:46:00,375 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 236 flow [2023-11-26 11:46:00,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=82, PETRI_TRANSITIONS=65} [2023-11-26 11:46:00,376 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 6 predicate places. [2023-11-26 11:46:00,377 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 236 flow [2023-11-26 11:46:00,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:00,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:00,377 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:00,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 11:46:00,378 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:46:00,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:00,378 INFO L85 PathProgramCache]: Analyzing trace with hash -299554695, now seen corresponding path program 1 times [2023-11-26 11:46:00,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:00,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267363789] [2023-11-26 11:46:00,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:00,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:46:00,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:00,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267363789] [2023-11-26 11:46:00,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267363789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:00,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:00,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:46:00,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359701821] [2023-11-26 11:46:00,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:00,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:46:00,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:00,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:46:00,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:46:00,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 74 [2023-11-26 11:46:00,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 65 transitions, 236 flow. Second operand has 6 states, 6 states have (on average 45.5) internal successors, (273), 6 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:00,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:46:00,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 74 [2023-11-26 11:46:00,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:01,081 INFO L124 PetriNetUnfolderBase]: 84/316 cut-off events. [2023-11-26 11:46:01,081 INFO L125 PetriNetUnfolderBase]: For 159/162 co-relation queries the response was YES. [2023-11-26 11:46:01,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 316 events. 84/316 cut-off events. For 159/162 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1449 event pairs, 50 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 662. Up to 106 conditions per place. [2023-11-26 11:46:01,085 INFO L140 encePairwiseOnDemand]: 67/74 looper letters, 53 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2023-11-26 11:46:01,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 81 transitions, 410 flow [2023-11-26 11:46:01,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:46:01,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:46:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 305 transitions. [2023-11-26 11:46:01,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6869369369369369 [2023-11-26 11:46:01,087 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 305 transitions. [2023-11-26 11:46:01,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 305 transitions. [2023-11-26 11:46:01,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:46:01,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 305 transitions. [2023-11-26 11:46:01,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 50.833333333333336) internal successors, (305), 6 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:01,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:01,091 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:01,092 INFO L175 Difference]: Start difference. First operand has 82 places, 65 transitions, 236 flow. Second operand 6 states and 305 transitions. [2023-11-26 11:46:01,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 81 transitions, 410 flow [2023-11-26 11:46:01,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 81 transitions, 392 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:46:01,101 INFO L231 Difference]: Finished difference. Result has 84 places, 64 transitions, 238 flow [2023-11-26 11:46:01,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=84, PETRI_TRANSITIONS=64} [2023-11-26 11:46:01,102 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 8 predicate places. [2023-11-26 11:46:01,102 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 64 transitions, 238 flow [2023-11-26 11:46:01,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.5) internal successors, (273), 6 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:01,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:01,103 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:01,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 11:46:01,103 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:46:01,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:01,104 INFO L85 PathProgramCache]: Analyzing trace with hash -299554694, now seen corresponding path program 1 times [2023-11-26 11:46:01,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:01,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708098494] [2023-11-26 11:46:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:01,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:01,601 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:46:01,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:01,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708098494] [2023-11-26 11:46:01,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708098494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:01,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:01,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:46:01,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693928476] [2023-11-26 11:46:01,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:01,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:46:01,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:01,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:46:01,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:46:02,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 74 [2023-11-26 11:46:02,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 64 transitions, 238 flow. Second operand has 9 states, 9 states have (on average 44.666666666666664) internal successors, (402), 9 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:02,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:46:02,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 74 [2023-11-26 11:46:02,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:02,489 INFO L124 PetriNetUnfolderBase]: 96/332 cut-off events. [2023-11-26 11:46:02,489 INFO L125 PetriNetUnfolderBase]: For 175/179 co-relation queries the response was YES. [2023-11-26 11:46:02,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 332 events. 96/332 cut-off events. For 175/179 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1567 event pairs, 57 based on Foata normal form. 10/303 useless extension candidates. Maximal degree in co-relation 727. Up to 164 conditions per place. [2023-11-26 11:46:02,493 INFO L140 encePairwiseOnDemand]: 61/74 looper letters, 48 selfloop transitions, 13 changer transitions 3/84 dead transitions. [2023-11-26 11:46:02,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 84 transitions, 427 flow [2023-11-26 11:46:02,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:46:02,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:46:02,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 479 transitions. [2023-11-26 11:46:02,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472972972972973 [2023-11-26 11:46:02,496 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 479 transitions. [2023-11-26 11:46:02,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 479 transitions. [2023-11-26 11:46:02,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:46:02,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 479 transitions. [2023-11-26 11:46:02,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 47.9) internal successors, (479), 10 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:02,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 74.0) internal successors, (814), 11 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:02,502 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 74.0) internal successors, (814), 11 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:02,502 INFO L175 Difference]: Start difference. First operand has 84 places, 64 transitions, 238 flow. Second operand 10 states and 479 transitions. [2023-11-26 11:46:02,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 84 transitions, 427 flow [2023-11-26 11:46:02,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 411 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-26 11:46:02,506 INFO L231 Difference]: Finished difference. Result has 89 places, 66 transitions, 267 flow [2023-11-26 11:46:02,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=267, PETRI_PLACES=89, PETRI_TRANSITIONS=66} [2023-11-26 11:46:02,508 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 13 predicate places. [2023-11-26 11:46:02,508 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 66 transitions, 267 flow [2023-11-26 11:46:02,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 44.666666666666664) internal successors, (402), 9 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:02,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:02,509 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:02,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 11:46:02,509 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:46:02,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:02,510 INFO L85 PathProgramCache]: Analyzing trace with hash -396505909, now seen corresponding path program 1 times [2023-11-26 11:46:02,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:02,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952794868] [2023-11-26 11:46:02,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:02,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:03,228 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:46:03,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:03,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952794868] [2023-11-26 11:46:03,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952794868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:03,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:03,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:46:03,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247780914] [2023-11-26 11:46:03,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:03,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:46:03,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:03,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:46:03,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:46:03,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 74 [2023-11-26 11:46:03,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 66 transitions, 267 flow. Second operand has 9 states, 9 states have (on average 38.77777777777778) internal successors, (349), 9 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:03,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:46:03,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 74 [2023-11-26 11:46:03,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:04,066 INFO L124 PetriNetUnfolderBase]: 90/333 cut-off events. [2023-11-26 11:46:04,066 INFO L125 PetriNetUnfolderBase]: For 215/222 co-relation queries the response was YES. [2023-11-26 11:46:04,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 806 conditions, 333 events. 90/333 cut-off events. For 215/222 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1611 event pairs, 11 based on Foata normal form. 14/300 useless extension candidates. Maximal degree in co-relation 748. Up to 130 conditions per place. [2023-11-26 11:46:04,069 INFO L140 encePairwiseOnDemand]: 65/74 looper letters, 50 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2023-11-26 11:46:04,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 80 transitions, 438 flow [2023-11-26 11:46:04,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:46:04,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:46:04,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 306 transitions. [2023-11-26 11:46:04,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5907335907335908 [2023-11-26 11:46:04,072 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 306 transitions. [2023-11-26 11:46:04,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 306 transitions. [2023-11-26 11:46:04,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:46:04,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 306 transitions. [2023-11-26 11:46:04,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 43.714285714285715) internal successors, (306), 7 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:04,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:04,076 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:04,076 INFO L175 Difference]: Start difference. First operand has 89 places, 66 transitions, 267 flow. Second operand 7 states and 306 transitions. [2023-11-26 11:46:04,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 80 transitions, 438 flow [2023-11-26 11:46:04,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 80 transitions, 405 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-11-26 11:46:04,080 INFO L231 Difference]: Finished difference. Result has 84 places, 66 transitions, 263 flow [2023-11-26 11:46:04,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=263, PETRI_PLACES=84, PETRI_TRANSITIONS=66} [2023-11-26 11:46:04,081 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 8 predicate places. [2023-11-26 11:46:04,081 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 66 transitions, 263 flow [2023-11-26 11:46:04,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 38.77777777777778) internal successors, (349), 9 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:04,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:04,082 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:04,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 11:46:04,082 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:46:04,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:04,083 INFO L85 PathProgramCache]: Analyzing trace with hash -696260484, now seen corresponding path program 1 times [2023-11-26 11:46:04,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:04,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604549423] [2023-11-26 11:46:04,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:04,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:46:05,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:05,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604549423] [2023-11-26 11:46:05,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604549423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:05,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:05,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-26 11:46:05,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356023374] [2023-11-26 11:46:05,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:05,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:46:05,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:05,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:46:05,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:46:06,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 74 [2023-11-26 11:46:06,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 66 transitions, 263 flow. Second operand has 12 states, 12 states have (on average 33.5) internal successors, (402), 12 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:06,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:46:06,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 74 [2023-11-26 11:46:06,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:07,103 INFO L124 PetriNetUnfolderBase]: 150/463 cut-off events. [2023-11-26 11:46:07,103 INFO L125 PetriNetUnfolderBase]: For 305/314 co-relation queries the response was YES. [2023-11-26 11:46:07,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1113 conditions, 463 events. 150/463 cut-off events. For 305/314 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2363 event pairs, 62 based on Foata normal form. 0/418 useless extension candidates. Maximal degree in co-relation 1056. Up to 225 conditions per place. [2023-11-26 11:46:07,108 INFO L140 encePairwiseOnDemand]: 62/74 looper letters, 72 selfloop transitions, 18 changer transitions 0/103 dead transitions. [2023-11-26 11:46:07,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 103 transitions, 596 flow [2023-11-26 11:46:07,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:46:07,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 11:46:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 450 transitions. [2023-11-26 11:46:07,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067567567567568 [2023-11-26 11:46:07,113 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 450 transitions. [2023-11-26 11:46:07,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 450 transitions. [2023-11-26 11:46:07,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:46:07,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 450 transitions. [2023-11-26 11:46:07,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 37.5) internal successors, (450), 12 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:07,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:07,120 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:07,120 INFO L175 Difference]: Start difference. First operand has 84 places, 66 transitions, 263 flow. Second operand 12 states and 450 transitions. [2023-11-26 11:46:07,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 103 transitions, 596 flow [2023-11-26 11:46:07,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 103 transitions, 589 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-26 11:46:07,126 INFO L231 Difference]: Finished difference. Result has 97 places, 76 transitions, 365 flow [2023-11-26 11:46:07,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=365, PETRI_PLACES=97, PETRI_TRANSITIONS=76} [2023-11-26 11:46:07,127 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 21 predicate places. [2023-11-26 11:46:07,127 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 76 transitions, 365 flow [2023-11-26 11:46:07,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 33.5) internal successors, (402), 12 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:07,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:07,128 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:07,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-26 11:46:07,128 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:46:07,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:07,129 INFO L85 PathProgramCache]: Analyzing trace with hash -696260485, now seen corresponding path program 1 times [2023-11-26 11:46:07,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:07,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032017576] [2023-11-26 11:46:07,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:07,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:46:08,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:08,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032017576] [2023-11-26 11:46:08,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032017576] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:08,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:08,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-26 11:46:08,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2188610] [2023-11-26 11:46:08,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:08,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:46:08,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:08,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:46:08,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:46:09,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 74 [2023-11-26 11:46:09,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 76 transitions, 365 flow. Second operand has 13 states, 13 states have (on average 37.38461538461539) internal successors, (486), 13 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:09,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:46:09,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 74 [2023-11-26 11:46:09,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:10,165 INFO L124 PetriNetUnfolderBase]: 150/457 cut-off events. [2023-11-26 11:46:10,165 INFO L125 PetriNetUnfolderBase]: For 450/459 co-relation queries the response was YES. [2023-11-26 11:46:10,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1259 conditions, 457 events. 150/457 cut-off events. For 450/459 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2327 event pairs, 43 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 1198. Up to 232 conditions per place. [2023-11-26 11:46:10,170 INFO L140 encePairwiseOnDemand]: 61/74 looper letters, 66 selfloop transitions, 19 changer transitions 0/98 dead transitions. [2023-11-26 11:46:10,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 98 transitions, 621 flow [2023-11-26 11:46:10,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:46:10,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 11:46:10,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 494 transitions. [2023-11-26 11:46:10,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5563063063063063 [2023-11-26 11:46:10,174 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 494 transitions. [2023-11-26 11:46:10,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 494 transitions. [2023-11-26 11:46:10,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:46:10,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 494 transitions. [2023-11-26 11:46:10,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 41.166666666666664) internal successors, (494), 12 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:10,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:10,180 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:10,180 INFO L175 Difference]: Start difference. First operand has 97 places, 76 transitions, 365 flow. Second operand 12 states and 494 transitions. [2023-11-26 11:46:10,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 98 transitions, 621 flow [2023-11-26 11:46:10,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 609 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 11:46:10,194 INFO L231 Difference]: Finished difference. Result has 105 places, 80 transitions, 448 flow [2023-11-26 11:46:10,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=448, PETRI_PLACES=105, PETRI_TRANSITIONS=80} [2023-11-26 11:46:10,195 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 29 predicate places. [2023-11-26 11:46:10,196 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 80 transitions, 448 flow [2023-11-26 11:46:10,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 37.38461538461539) internal successors, (486), 13 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:10,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:10,201 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:10,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-26 11:46:10,202 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:46:10,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:10,203 INFO L85 PathProgramCache]: Analyzing trace with hash 593219163, now seen corresponding path program 1 times [2023-11-26 11:46:10,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:10,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605483889] [2023-11-26 11:46:10,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:10,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:46:10,313 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 11:46:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:46:10,408 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 11:46:10,410 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 11:46:10,411 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 52 remaining) [2023-11-26 11:46:10,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 52 remaining) [2023-11-26 11:46:10,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 52 remaining) [2023-11-26 11:46:10,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 52 remaining) [2023-11-26 11:46:10,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 52 remaining) [2023-11-26 11:46:10,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 52 remaining) [2023-11-26 11:46:10,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 52 remaining) [2023-11-26 11:46:10,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 52 remaining) [2023-11-26 11:46:10,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 52 remaining) [2023-11-26 11:46:10,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 52 remaining) [2023-11-26 11:46:10,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 52 remaining) [2023-11-26 11:46:10,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 52 remaining) [2023-11-26 11:46:10,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 52 remaining) [2023-11-26 11:46:10,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 52 remaining) [2023-11-26 11:46:10,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 52 remaining) [2023-11-26 11:46:10,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 52 remaining) [2023-11-26 11:46:10,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 52 remaining) [2023-11-26 11:46:10,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 52 remaining) [2023-11-26 11:46:10,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 52 remaining) [2023-11-26 11:46:10,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 52 remaining) [2023-11-26 11:46:10,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 52 remaining) [2023-11-26 11:46:10,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 52 remaining) [2023-11-26 11:46:10,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 52 remaining) [2023-11-26 11:46:10,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 52 remaining) [2023-11-26 11:46:10,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 52 remaining) [2023-11-26 11:46:10,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 52 remaining) [2023-11-26 11:46:10,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 52 remaining) [2023-11-26 11:46:10,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK (24 of 52 remaining) [2023-11-26 11:46:10,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (23 of 52 remaining) [2023-11-26 11:46:10,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 52 remaining) [2023-11-26 11:46:10,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 52 remaining) [2023-11-26 11:46:10,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 52 remaining) [2023-11-26 11:46:10,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 52 remaining) [2023-11-26 11:46:10,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 52 remaining) [2023-11-26 11:46:10,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 52 remaining) [2023-11-26 11:46:10,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 52 remaining) [2023-11-26 11:46:10,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 52 remaining) [2023-11-26 11:46:10,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 52 remaining) [2023-11-26 11:46:10,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 52 remaining) [2023-11-26 11:46:10,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 52 remaining) [2023-11-26 11:46:10,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 52 remaining) [2023-11-26 11:46:10,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 52 remaining) [2023-11-26 11:46:10,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 52 remaining) [2023-11-26 11:46:10,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 52 remaining) [2023-11-26 11:46:10,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 52 remaining) [2023-11-26 11:46:10,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 52 remaining) [2023-11-26 11:46:10,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 52 remaining) [2023-11-26 11:46:10,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 52 remaining) [2023-11-26 11:46:10,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 52 remaining) [2023-11-26 11:46:10,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 52 remaining) [2023-11-26 11:46:10,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 52 remaining) [2023-11-26 11:46:10,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 52 remaining) [2023-11-26 11:46:10,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-26 11:46:10,424 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:10,432 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-26 11:46:10,433 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 11:46:10,479 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-26 11:46:10,482 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre42 could not be translated [2023-11-26 11:46:10,498 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 11:46:10 BasicIcfg [2023-11-26 11:46:10,498 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 11:46:10,498 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 11:46:10,499 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 11:46:10,499 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 11:46:10,499 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:45:49" (3/4) ... [2023-11-26 11:46:10,500 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-26 11:46:10,526 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-26 11:46:10,531 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre42 could not be translated [2023-11-26 11:46:10,580 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/witness.graphml [2023-11-26 11:46:10,580 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 11:46:10,581 INFO L158 Benchmark]: Toolchain (without parser) took 23583.73ms. Allocated memory was 155.2MB in the beginning and 419.4MB in the end (delta: 264.2MB). Free memory was 113.0MB in the beginning and 191.0MB in the end (delta: -78.0MB). Peak memory consumption was 186.7MB. Max. memory is 16.1GB. [2023-11-26 11:46:10,581 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 155.2MB. Free memory is still 98.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 11:46:10,582 INFO L158 Benchmark]: CACSL2BoogieTranslator took 910.14ms. Allocated memory is still 155.2MB. Free memory was 112.5MB in the beginning and 72.6MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2023-11-26 11:46:10,582 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.43ms. Allocated memory is still 155.2MB. Free memory was 72.6MB in the beginning and 69.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 11:46:10,583 INFO L158 Benchmark]: Boogie Preprocessor took 71.62ms. Allocated memory is still 155.2MB. Free memory was 69.5MB in the beginning and 66.3MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-26 11:46:10,583 INFO L158 Benchmark]: RCFGBuilder took 1222.14ms. Allocated memory was 155.2MB in the beginning and 195.0MB in the end (delta: 39.8MB). Free memory was 66.3MB in the beginning and 121.9MB in the end (delta: -55.6MB). Peak memory consumption was 17.8MB. Max. memory is 16.1GB. [2023-11-26 11:46:10,583 INFO L158 Benchmark]: TraceAbstraction took 21225.97ms. Allocated memory was 195.0MB in the beginning and 419.4MB in the end (delta: 224.4MB). Free memory was 120.9MB in the beginning and 196.2MB in the end (delta: -75.4MB). Peak memory consumption was 150.1MB. Max. memory is 16.1GB. [2023-11-26 11:46:10,584 INFO L158 Benchmark]: Witness Printer took 82.13ms. Allocated memory is still 419.4MB. Free memory was 196.2MB in the beginning and 191.0MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-26 11:46:10,587 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 155.2MB. Free memory is still 98.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 910.14ms. Allocated memory is still 155.2MB. Free memory was 112.5MB in the beginning and 72.6MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.43ms. Allocated memory is still 155.2MB. Free memory was 72.6MB in the beginning and 69.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 71.62ms. Allocated memory is still 155.2MB. Free memory was 69.5MB in the beginning and 66.3MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1222.14ms. Allocated memory was 155.2MB in the beginning and 195.0MB in the end (delta: 39.8MB). Free memory was 66.3MB in the beginning and 121.9MB in the end (delta: -55.6MB). Peak memory consumption was 17.8MB. Max. memory is 16.1GB. * TraceAbstraction took 21225.97ms. Allocated memory was 195.0MB in the beginning and 419.4MB in the end (delta: 224.4MB). Free memory was 120.9MB in the beginning and 196.2MB in the end (delta: -75.4MB). Peak memory consumption was 150.1MB. Max. memory is 16.1GB. * Witness Printer took 82.13ms. Allocated memory is still 419.4MB. Free memory was 196.2MB in the beginning and 191.0MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre42 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre42 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L1232-L1235] 0 struct cache { struct s *slots[10]; pthread_mutex_t mutex[10]; } c; [L1232-L1235] 0 struct cache { struct s *slots[10]; pthread_mutex_t mutex[10]; } c; [L1232-L1235] 0 struct cache { struct s *slots[10]; pthread_mutex_t mutex[10]; } c; [L1256] 0 int i = 0; VAL [c={1:0}, i=0] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=1] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=2] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=3] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=4] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=5] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=6] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=7] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=8] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=9] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=10] [L1256] COND FALSE 0 !(i < 10) [L1258] 0 int j = __VERIFIER_nondet_int(); [L1259] CALL 0 assume_abort_if_not(0 <= j && j < 10) [L11] COND FALSE 0 !(!cond) [L1259] RET 0 assume_abort_if_not(0 <= j && j < 10) [L1260] 0 struct s *p; [L1261] 0 pthread_t t1; [L1262] CALL, EXPR 0 new(1) [L1237] 0 struct s *p = malloc(sizeof(struct s)); [L1238] 0 p->datum = x VAL [c={1:0}] [L1239] 0 p->next = ((void *)0) [L1240] 0 return p; [L1262] RET, EXPR 0 new(1) [L1262] 0 c.slots[j] = new(1) [L1263] CALL, EXPR 0 new(2) [L1237] 0 struct s *p = malloc(sizeof(struct s)); [L1238] 0 p->datum = x VAL [c={1:0}] [L1239] 0 p->next = ((void *)0) [L1240] 0 return p; [L1263] RET, EXPR 0 new(2) [L1263] EXPR 0 c.slots[j] [L1263] CALL 0 list_add(new(2), c.slots[j]) [L1243] EXPR 0 list->next [L1243] 0 struct s *temp = list->next; [L1244] 0 list->next = node VAL [c={1:0}] [L1245] 0 node->next = temp [L1263] RET 0 list_add(new(2), c.slots[j]) [L1264] FCALL, FORK 0 pthread_create(&t1, ((void *)0), t_fun, ((void *)0)) VAL [c={1:0}, j=9, t1={9:0}] [L1248] 1 int i = __VERIFIER_nondet_int(); [L1249] CALL 1 assume_abort_if_not(0 <= i && i < 10) [L11] COND FALSE 1 !(!cond) [L1249] RET 1 assume_abort_if_not(0 <= i && i < 10) [L1251] CALL, EXPR 1 new(3) [L1237] 1 struct s *p = malloc(sizeof(struct s)); [L1238] 1 p->datum = x VAL [arg={0:0}, arg={0:0}, c={1:0}, i=0] [L1239] 1 p->next = ((void *)0) [L1240] 1 return p; [L1251] RET, EXPR 1 new(3) [L1251] EXPR 1 c.slots[i] [L1251] CALL 1 list_add(new(3), c.slots[i]) [L1243] 1 list->next - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1255]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1264]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 99 locations, 52 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 21.0s, OverallIterations: 21, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 12.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3937 SdHoareTripleChecker+Valid, 9.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2860 mSDsluCounter, 1785 SdHoareTripleChecker+Invalid, 7.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1730 mSDsCounter, 157 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10805 IncrementalHoareTripleChecker+Invalid, 10962 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 157 mSolverCounterUnsat, 55 mSDtfsCounter, 10805 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 147 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=448occurred in iteration=20, InterpolantAutomatonStates: 120, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 426 NumberOfCodeBlocks, 426 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 3185 SizeOfPredicates, 0 NumberOfNonLiveVariables, 141 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 24 InterpolantComputations, 18 PerfectInterpolantSequences, 890/923 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-26 11:46:10,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d36cb0d-05da-4eed-8c78-73f0188c2737/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)