./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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_df8af06f-acbc-42fa-9072-736980b95b7a/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df8af06f-acbc-42fa-9072-736980b95b7a/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_df8af06f-acbc-42fa-9072-736980b95b7a/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df8af06f-acbc-42fa-9072-736980b95b7a/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df8af06f-acbc-42fa-9072-736980b95b7a/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df8af06f-acbc-42fa-9072-736980b95b7a/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:05:46,047 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:05:46,116 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df8af06f-acbc-42fa-9072-736980b95b7a/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:05:46,121 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:05:46,122 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:05:46,148 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:05:46,149 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:05:46,150 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:05:46,151 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:05:46,151 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:05:46,152 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:05:46,152 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:05:46,153 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:05:46,153 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:05:46,154 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:05:46,154 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:05:46,155 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:05:46,155 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:05:46,156 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:05:46,156 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:05:46,157 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:05:46,157 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:05:46,158 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:05:46,158 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:05:46,158 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:05:46,159 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:05:46,159 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:05:46,160 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:05:46,160 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:05:46,160 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:05:46,161 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:05:46,161 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:05:46,161 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:05:46,162 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:05:46,162 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:05:46,162 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:05:46,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:05:46,163 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:05:46,163 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:05:46,163 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:05:46,163 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:05:46,164 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:05:46,164 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_df8af06f-acbc-42fa-9072-736980b95b7a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df8af06f-acbc-42fa-9072-736980b95b7a/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 [2023-11-26 12:05:46,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:05:46,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:05:46,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:05:46,475 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:05:46,476 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:05:46,477 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df8af06f-acbc-42fa-9072-736980b95b7a/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2023-11-26 12:05:49,765 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:05:50,175 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:05:50,183 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df8af06f-acbc-42fa-9072-736980b95b7a/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2023-11-26 12:05:50,208 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df8af06f-acbc-42fa-9072-736980b95b7a/bin/uautomizer-verify-VRDe98Ueme/data/a5a56feac/599482a3066046eaa809394d3476f2f5/FLAGb31f84d61 [2023-11-26 12:05:50,230 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df8af06f-acbc-42fa-9072-736980b95b7a/bin/uautomizer-verify-VRDe98Ueme/data/a5a56feac/599482a3066046eaa809394d3476f2f5 [2023-11-26 12:05:50,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:05:50,242 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:05:50,244 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:05:50,244 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:05:50,250 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:05:50,251 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:50,253 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d667607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50, skipping insertion in model container [2023-11-26 12:05:50,253 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:50,330 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:05:50,782 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df8af06f-acbc-42fa-9072-736980b95b7a/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2023-11-26 12:05:50,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:05:50,825 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:05:50,872 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df8af06f-acbc-42fa-9072-736980b95b7a/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2023-11-26 12:05:50,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:05:50,915 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:05:50,916 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:05:50,925 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:05:50,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50 WrapperNode [2023-11-26 12:05:50,926 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:05:50,927 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:05:50,928 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:05:50,928 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:05:50,937 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:50,953 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:50,983 INFO L138 Inliner]: procedures = 173, calls = 50, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 118 [2023-11-26 12:05:50,984 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:05:50,985 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:05:50,985 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:05:50,985 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:05:51,002 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:51,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:51,019 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:51,049 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-26 12:05:51,051 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:51,051 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:51,072 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:51,082 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:51,085 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:51,095 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:51,099 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:05:51,100 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:05:51,101 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:05:51,101 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:05:51,102 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:51,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:05:51,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df8af06f-acbc-42fa-9072-736980b95b7a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:51,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df8af06f-acbc-42fa-9072-736980b95b7a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:05:51,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df8af06f-acbc-42fa-9072-736980b95b7a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:05:51,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 12:05:51,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 12:05:51,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 12:05:51,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 12:05:51,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 12:05:51,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 12:05:51,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 12:05:51,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 12:05:51,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 12:05:51,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 12:05:51,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 12:05:51,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:05:51,208 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2023-11-26 12:05:51,208 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2023-11-26 12:05:51,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 12:05:51,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:05:51,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:05:51,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:05:51,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 12:05:51,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 12:05:51,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 12:05:51,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 12:05:51,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:05:51,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:05:51,214 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2023-11-26 12:05:51,214 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2023-11-26 12:05:51,216 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 12:05:51,397 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:05:51,400 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:05:51,644 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:05:51,846 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:05:51,847 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-26 12:05:51,847 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:51 BoogieIcfgContainer [2023-11-26 12:05:51,848 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:05:51,850 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:05:51,851 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:05:51,854 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:05:51,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:05:50" (1/3) ... [2023-11-26 12:05:51,855 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cdb620a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:51, skipping insertion in model container [2023-11-26 12:05:51,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (2/3) ... [2023-11-26 12:05:51,856 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cdb620a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:51, skipping insertion in model container [2023-11-26 12:05:51,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:51" (3/3) ... [2023-11-26 12:05:51,857 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2023-11-26 12:05:51,867 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 12:05:51,879 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:05:51,879 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:05:51,879 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 12:05:51,943 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-26 12:05:51,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 57 transitions, 142 flow [2023-11-26 12:05:52,023 INFO L124 PetriNetUnfolderBase]: 2/53 cut-off events. [2023-11-26 12:05:52,024 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-26 12:05:52,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 53 events. 2/53 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 101 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-11-26 12:05:52,029 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 57 transitions, 142 flow [2023-11-26 12:05:52,034 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 51 transitions, 123 flow [2023-11-26 12:05:52,045 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:05:52,052 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@4890fffc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:05:52,052 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-26 12:05:52,071 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 12:05:52,072 INFO L124 PetriNetUnfolderBase]: 1/32 cut-off events. [2023-11-26 12:05:52,072 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 12:05:52,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:05:52,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:52,073 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 12:05:52,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:52,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1937302976, now seen corresponding path program 1 times [2023-11-26 12:05:52,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:52,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716277247] [2023-11-26 12:05:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:52,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:52,553 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 12:05:52,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:52,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716277247] [2023-11-26 12:05:52,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716277247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:52,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:52,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 12:05:52,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373093304] [2023-11-26 12:05:52,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:52,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:05:52,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:52,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:05:52,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:05:52,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 57 [2023-11-26 12:05:52,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 12:05:52,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:05:52,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 57 [2023-11-26 12:05:52,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:05:56,273 INFO L124 PetriNetUnfolderBase]: 12461/22123 cut-off events. [2023-11-26 12:05:56,274 INFO L125 PetriNetUnfolderBase]: For 1710/1710 co-relation queries the response was YES. [2023-11-26 12:05:56,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40825 conditions, 22123 events. 12461/22123 cut-off events. For 1710/1710 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 191888 event pairs, 1333 based on Foata normal form. 1220/22292 useless extension candidates. Maximal degree in co-relation 32953. Up to 5783 conditions per place. [2023-11-26 12:05:56,631 INFO L140 encePairwiseOnDemand]: 44/57 looper letters, 176 selfloop transitions, 37 changer transitions 6/233 dead transitions. [2023-11-26 12:05:56,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 233 transitions, 1012 flow [2023-11-26 12:05:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 12:05:56,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 12:05:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 469 transitions. [2023-11-26 12:05:56,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6329284750337382 [2023-11-26 12:05:56,655 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 469 transitions. [2023-11-26 12:05:56,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 469 transitions. [2023-11-26 12:05:56,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:05:56,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 469 transitions. [2023-11-26 12:05:56,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 36.07692307692308) internal successors, (469), 13 states have internal predecessors, (469), 0 states have call successors, (0), 0 states 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 12:05:56,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 57.0) internal successors, (798), 14 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 12:05:56,681 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 57.0) internal successors, (798), 14 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 12:05:56,683 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 123 flow. Second operand 13 states and 469 transitions. [2023-11-26 12:05:56,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 233 transitions, 1012 flow [2023-11-26 12:05:56,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 233 transitions, 948 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-26 12:05:56,748 INFO L231 Difference]: Finished difference. Result has 75 places, 88 transitions, 349 flow [2023-11-26 12:05:56,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=349, PETRI_PLACES=75, PETRI_TRANSITIONS=88} [2023-11-26 12:05:56,759 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 13 predicate places. [2023-11-26 12:05:56,759 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 88 transitions, 349 flow [2023-11-26 12:05:56,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 12:05:56,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:05:56,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:56,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:05:56,762 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 12:05:56,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:56,763 INFO L85 PathProgramCache]: Analyzing trace with hash 801931685, now seen corresponding path program 1 times [2023-11-26 12:05:56,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:56,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865960246] [2023-11-26 12:05:56,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:56,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:56,969 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 12:05:56,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:56,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865960246] [2023-11-26 12:05:56,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865960246] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:56,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:56,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:05:56,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258997851] [2023-11-26 12:05:56,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:56,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:05:56,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:56,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:05:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:05:56,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 57 [2023-11-26 12:05:56,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 88 transitions, 349 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 12:05:56,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:05:56,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 57 [2023-11-26 12:05:56,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:05:58,620 INFO L124 PetriNetUnfolderBase]: 4908/10846 cut-off events. [2023-11-26 12:05:58,621 INFO L125 PetriNetUnfolderBase]: For 1292/1450 co-relation queries the response was YES. [2023-11-26 12:05:58,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21226 conditions, 10846 events. 4908/10846 cut-off events. For 1292/1450 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 107312 event pairs, 2096 based on Foata normal form. 406/10334 useless extension candidates. Maximal degree in co-relation 20122. Up to 3942 conditions per place. [2023-11-26 12:05:58,729 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 40 selfloop transitions, 4 changer transitions 0/105 dead transitions. [2023-11-26 12:05:58,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 105 transitions, 477 flow [2023-11-26 12:05:58,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:05:58,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:05:58,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-11-26 12:05:58,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7368421052631579 [2023-11-26 12:05:58,736 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-11-26 12:05:58,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-11-26 12:05:58,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:05:58,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-11-26 12:05:58,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 12:05:58,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 12:05:58,741 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 12:05:58,747 INFO L175 Difference]: Start difference. First operand has 75 places, 88 transitions, 349 flow. Second operand 3 states and 126 transitions. [2023-11-26 12:05:58,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 105 transitions, 477 flow [2023-11-26 12:05:58,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 105 transitions, 477 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 12:05:58,896 INFO L231 Difference]: Finished difference. Result has 78 places, 88 transitions, 365 flow [2023-11-26 12:05:58,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=365, PETRI_PLACES=78, PETRI_TRANSITIONS=88} [2023-11-26 12:05:58,898 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 16 predicate places. [2023-11-26 12:05:58,898 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 88 transitions, 365 flow [2023-11-26 12:05:58,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 12:05:58,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:05:58,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:58,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 12:05:58,899 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 12:05:58,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:58,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1531572869, now seen corresponding path program 2 times [2023-11-26 12:05:58,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:58,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386112317] [2023-11-26 12:05:58,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:58,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:59,058 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 12:05:59,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:59,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386112317] [2023-11-26 12:05:59,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386112317] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:59,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:59,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:05:59,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029818566] [2023-11-26 12:05:59,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:59,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:05:59,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:59,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:05:59,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:05:59,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 57 [2023-11-26 12:05:59,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 88 transitions, 365 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 12:05:59,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:05:59,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 57 [2023-11-26 12:05:59,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:06:00,599 INFO L124 PetriNetUnfolderBase]: 5414/11332 cut-off events. [2023-11-26 12:06:00,599 INFO L125 PetriNetUnfolderBase]: For 4069/4143 co-relation queries the response was YES. [2023-11-26 12:06:00,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24077 conditions, 11332 events. 5414/11332 cut-off events. For 4069/4143 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 103967 event pairs, 1639 based on Foata normal form. 126/10860 useless extension candidates. Maximal degree in co-relation 22911. Up to 3757 conditions per place. [2023-11-26 12:06:00,722 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 59 selfloop transitions, 9 changer transitions 3/132 dead transitions. [2023-11-26 12:06:00,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 132 transitions, 621 flow [2023-11-26 12:06:00,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:06:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 12:06:00,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 177 transitions. [2023-11-26 12:06:00,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7763157894736842 [2023-11-26 12:06:00,726 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 177 transitions. [2023-11-26 12:06:00,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 177 transitions. [2023-11-26 12:06:00,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:06:00,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 177 transitions. [2023-11-26 12:06:00,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 12:06:00,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 12:06:00,730 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 12:06:00,730 INFO L175 Difference]: Start difference. First operand has 78 places, 88 transitions, 365 flow. Second operand 4 states and 177 transitions. [2023-11-26 12:06:00,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 132 transitions, 621 flow [2023-11-26 12:06:00,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 132 transitions, 609 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 12:06:00,847 INFO L231 Difference]: Finished difference. Result has 82 places, 94 transitions, 423 flow [2023-11-26 12:06:00,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=423, PETRI_PLACES=82, PETRI_TRANSITIONS=94} [2023-11-26 12:06:00,849 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 20 predicate places. [2023-11-26 12:06:00,850 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 94 transitions, 423 flow [2023-11-26 12:06:00,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 12:06:00,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:06:00,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:00,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 12:06:00,851 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 12:06:00,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:00,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1241268126, now seen corresponding path program 1 times [2023-11-26 12:06:00,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:00,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965737939] [2023-11-26 12:06:00,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:00,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:00,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:00,992 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 12:06:00,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:00,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965737939] [2023-11-26 12:06:00,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965737939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:06:00,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:06:00,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 12:06:01,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408883455] [2023-11-26 12:06:01,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:06:01,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:06:01,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:01,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:06:01,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:06:01,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 57 [2023-11-26 12:06:01,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 94 transitions, 423 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 12:06:01,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:06:01,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 57 [2023-11-26 12:06:01,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:06:04,252 INFO L124 PetriNetUnfolderBase]: 13844/23478 cut-off events. [2023-11-26 12:06:04,252 INFO L125 PetriNetUnfolderBase]: For 19479/20132 co-relation queries the response was YES. [2023-11-26 12:06:04,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58169 conditions, 23478 events. 13844/23478 cut-off events. For 19479/20132 co-relation queries the response was YES. Maximal size of possible extension queue 1140. Compared 187424 event pairs, 2194 based on Foata normal form. 350/23387 useless extension candidates. Maximal degree in co-relation 56243. Up to 5134 conditions per place. [2023-11-26 12:06:04,396 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 177 selfloop transitions, 52 changer transitions 67/321 dead transitions. [2023-11-26 12:06:04,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 321 transitions, 1871 flow [2023-11-26 12:06:04,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 12:06:04,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 12:06:04,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 464 transitions. [2023-11-26 12:06:04,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6261808367071525 [2023-11-26 12:06:04,400 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 464 transitions. [2023-11-26 12:06:04,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 464 transitions. [2023-11-26 12:06:04,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:06:04,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 464 transitions. [2023-11-26 12:06:04,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 35.69230769230769) internal successors, (464), 13 states have internal predecessors, (464), 0 states have call successors, (0), 0 states 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 12:06:04,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 57.0) internal successors, (798), 14 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 12:06:04,407 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 57.0) internal successors, (798), 14 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 12:06:04,408 INFO L175 Difference]: Start difference. First operand has 82 places, 94 transitions, 423 flow. Second operand 13 states and 464 transitions. [2023-11-26 12:06:04,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 321 transitions, 1871 flow [2023-11-26 12:06:05,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 321 transitions, 1871 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 12:06:05,229 INFO L231 Difference]: Finished difference. Result has 105 places, 130 transitions, 842 flow [2023-11-26 12:06:05,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=842, PETRI_PLACES=105, PETRI_TRANSITIONS=130} [2023-11-26 12:06:05,233 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 43 predicate places. [2023-11-26 12:06:05,234 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 130 transitions, 842 flow [2023-11-26 12:06:05,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 12:06:05,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:06:05,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:05,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 12:06:05,236 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 12:06:05,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:05,239 INFO L85 PathProgramCache]: Analyzing trace with hash -345786192, now seen corresponding path program 1 times [2023-11-26 12:06:05,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:05,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131451543] [2023-11-26 12:06:05,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:05,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:05,379 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 12:06:05,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:05,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131451543] [2023-11-26 12:06:05,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131451543] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:06:05,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:06:05,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 12:06:05,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732759065] [2023-11-26 12:06:05,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:06:05,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:06:05,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:05,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:06:05,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:06:05,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 57 [2023-11-26 12:06:05,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 130 transitions, 842 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 12:06:05,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:06:05,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 57 [2023-11-26 12:06:05,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:06:09,229 INFO L124 PetriNetUnfolderBase]: 13182/23116 cut-off events. [2023-11-26 12:06:09,229 INFO L125 PetriNetUnfolderBase]: For 33514/33915 co-relation queries the response was YES. [2023-11-26 12:06:09,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67542 conditions, 23116 events. 13182/23116 cut-off events. For 33514/33915 co-relation queries the response was YES. Maximal size of possible extension queue 1118. Compared 192495 event pairs, 2884 based on Foata normal form. 411/23363 useless extension candidates. Maximal degree in co-relation 63955. Up to 6148 conditions per place. [2023-11-26 12:06:09,404 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 180 selfloop transitions, 66 changer transitions 22/293 dead transitions. [2023-11-26 12:06:09,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 293 transitions, 2039 flow [2023-11-26 12:06:09,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 12:06:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 12:06:09,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 434 transitions. [2023-11-26 12:06:09,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5856950067476383 [2023-11-26 12:06:09,409 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 434 transitions. [2023-11-26 12:06:09,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 434 transitions. [2023-11-26 12:06:09,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:06:09,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 434 transitions. [2023-11-26 12:06:09,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 33.38461538461539) internal successors, (434), 13 states have internal predecessors, (434), 0 states have call successors, (0), 0 states 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 12:06:09,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 57.0) internal successors, (798), 14 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 12:06:09,416 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 57.0) internal successors, (798), 14 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 12:06:09,416 INFO L175 Difference]: Start difference. First operand has 105 places, 130 transitions, 842 flow. Second operand 13 states and 434 transitions. [2023-11-26 12:06:09,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 293 transitions, 2039 flow [2023-11-26 12:06:10,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 293 transitions, 1999 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-26 12:06:10,468 INFO L231 Difference]: Finished difference. Result has 119 places, 152 transitions, 1158 flow [2023-11-26 12:06:10,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1158, PETRI_PLACES=119, PETRI_TRANSITIONS=152} [2023-11-26 12:06:10,470 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 57 predicate places. [2023-11-26 12:06:10,470 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 152 transitions, 1158 flow [2023-11-26 12:06:10,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 12:06:10,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:06:10,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:10,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 12:06:10,471 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 12:06:10,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:10,472 INFO L85 PathProgramCache]: Analyzing trace with hash -47567194, now seen corresponding path program 1 times [2023-11-26 12:06:10,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:10,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381826083] [2023-11-26 12:06:10,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:10,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:10,568 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 12:06:10,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:10,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381826083] [2023-11-26 12:06:10,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381826083] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:06:10,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:06:10,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 12:06:10,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852371095] [2023-11-26 12:06:10,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:06:10,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:06:10,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:10,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:06:10,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:06:10,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 57 [2023-11-26 12:06:10,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 152 transitions, 1158 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 12:06:10,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:06:10,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 57 [2023-11-26 12:06:10,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:06:14,548 INFO L124 PetriNetUnfolderBase]: 14498/25001 cut-off events. [2023-11-26 12:06:14,548 INFO L125 PetriNetUnfolderBase]: For 41554/42079 co-relation queries the response was YES. [2023-11-26 12:06:14,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76317 conditions, 25001 events. 14498/25001 cut-off events. For 41554/42079 co-relation queries the response was YES. Maximal size of possible extension queue 1241. Compared 206280 event pairs, 3340 based on Foata normal form. 579/25282 useless extension candidates. Maximal degree in co-relation 73526. Up to 6812 conditions per place. [2023-11-26 12:06:14,693 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 183 selfloop transitions, 72 changer transitions 32/323 dead transitions. [2023-11-26 12:06:14,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 323 transitions, 2442 flow [2023-11-26 12:06:14,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 12:06:14,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 12:06:14,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 440 transitions. [2023-11-26 12:06:14,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5937921727395412 [2023-11-26 12:06:14,696 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 440 transitions. [2023-11-26 12:06:14,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 440 transitions. [2023-11-26 12:06:14,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:06:14,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 440 transitions. [2023-11-26 12:06:14,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 33.84615384615385) internal successors, (440), 13 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 12:06:14,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 57.0) internal successors, (798), 14 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 12:06:14,701 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 57.0) internal successors, (798), 14 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 12:06:14,702 INFO L175 Difference]: Start difference. First operand has 119 places, 152 transitions, 1158 flow. Second operand 13 states and 440 transitions. [2023-11-26 12:06:14,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 323 transitions, 2442 flow [2023-11-26 12:06:15,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 323 transitions, 2428 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-26 12:06:15,368 INFO L231 Difference]: Finished difference. Result has 134 places, 174 transitions, 1531 flow [2023-11-26 12:06:15,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1531, PETRI_PLACES=134, PETRI_TRANSITIONS=174} [2023-11-26 12:06:15,369 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 72 predicate places. [2023-11-26 12:06:15,369 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 174 transitions, 1531 flow [2023-11-26 12:06:15,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 12:06:15,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:06:15,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:15,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 12:06:15,370 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 12:06:15,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:15,371 INFO L85 PathProgramCache]: Analyzing trace with hash -776191228, now seen corresponding path program 1 times [2023-11-26 12:06:15,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:15,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881245895] [2023-11-26 12:06:15,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:15,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 12:06:15,412 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 12:06:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 12:06:15,463 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 12:06:15,463 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 12:06:15,464 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2023-11-26 12:06:15,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-26 12:06:15,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-11-26 12:06:15,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2023-11-26 12:06:15,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2023-11-26 12:06:15,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-11-26 12:06:15,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-26 12:06:15,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 12:06:15,473 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-11-26 12:06:15,480 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-26 12:06:15,481 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 12:06:15,538 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre4 could not be translated [2023-11-26 12:06:15,544 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre6 could not be translated [2023-11-26 12:06:15,545 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated [2023-11-26 12:06:15,547 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre10 could not be translated [2023-11-26 12:06:15,562 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:06:15 BasicIcfg [2023-11-26 12:06:15,562 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 12:06:15,562 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 12:06:15,562 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 12:06:15,563 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 12:06:15,563 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:51" (3/4) ... [2023-11-26 12:06:15,565 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-26 12:06:15,598 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre4 could not be translated [2023-11-26 12:06:15,599 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre6 could not be translated [2023-11-26 12:06:15,599 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated [2023-11-26 12:06:15,601 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre10 could not be translated [2023-11-26 12:06:15,659 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df8af06f-acbc-42fa-9072-736980b95b7a/bin/uautomizer-verify-VRDe98Ueme/witness.graphml [2023-11-26 12:06:15,659 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 12:06:15,660 INFO L158 Benchmark]: Toolchain (without parser) took 25418.30ms. Allocated memory was 142.6MB in the beginning and 6.7GB in the end (delta: 6.6GB). Free memory was 94.7MB in the beginning and 5.8GB in the end (delta: -5.7GB). Peak memory consumption was 861.9MB. Max. memory is 16.1GB. [2023-11-26 12:06:15,660 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 142.6MB. Free memory is still 114.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 12:06:15,661 INFO L158 Benchmark]: CACSL2BoogieTranslator took 682.72ms. Allocated memory is still 142.6MB. Free memory was 94.1MB in the beginning and 74.0MB in the end (delta: 20.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-26 12:06:15,661 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.07ms. Allocated memory is still 142.6MB. Free memory was 74.0MB in the beginning and 72.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 12:06:15,661 INFO L158 Benchmark]: Boogie Preprocessor took 114.53ms. Allocated memory is still 142.6MB. Free memory was 72.0MB in the beginning and 69.4MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 12:06:15,662 INFO L158 Benchmark]: RCFGBuilder took 747.58ms. Allocated memory was 142.6MB in the beginning and 197.1MB in the end (delta: 54.5MB). Free memory was 69.4MB in the beginning and 158.8MB in the end (delta: -89.3MB). Peak memory consumption was 30.2MB. Max. memory is 16.1GB. [2023-11-26 12:06:15,662 INFO L158 Benchmark]: TraceAbstraction took 23711.55ms. Allocated memory was 197.1MB in the beginning and 6.7GB in the end (delta: 6.5GB). Free memory was 157.7MB in the beginning and 5.8GB in the end (delta: -5.6GB). Peak memory consumption was 858.9MB. Max. memory is 16.1GB. [2023-11-26 12:06:15,663 INFO L158 Benchmark]: Witness Printer took 96.94ms. Allocated memory is still 6.7GB. Free memory was 5.8GB in the beginning and 5.8GB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-26 12:06:15,665 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 142.6MB. Free memory is still 114.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 682.72ms. Allocated memory is still 142.6MB. Free memory was 94.1MB in the beginning and 74.0MB in the end (delta: 20.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.07ms. Allocated memory is still 142.6MB. Free memory was 74.0MB in the beginning and 72.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 114.53ms. Allocated memory is still 142.6MB. Free memory was 72.0MB in the beginning and 69.4MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 747.58ms. Allocated memory was 142.6MB in the beginning and 197.1MB in the end (delta: 54.5MB). Free memory was 69.4MB in the beginning and 158.8MB in the end (delta: -89.3MB). Peak memory consumption was 30.2MB. Max. memory is 16.1GB. * TraceAbstraction took 23711.55ms. Allocated memory was 197.1MB in the beginning and 6.7GB in the end (delta: 6.5GB). Free memory was 157.7MB in the beginning and 5.8GB in the end (delta: -5.6GB). Peak memory consumption was 858.9MB. Max. memory is 16.1GB. * Witness Printer took 96.94ms. Allocated memory is still 6.7GB. Free memory was 5.8GB in the beginning and 5.8GB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre10 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre10 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: 738]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L704] 0 int w=0, r=0, x, y; [L748] 0 pthread_t t1, t2, t3, t4; [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [r=0, t1={7:0}, t2={8:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [r=0, t1={7:0}, t2={8:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L724] 2 int l; VAL [arg={0:0}, arg={0:0}, r=0, w=0, x=0, y=0] [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [r=0, t1={7:0}, t2={8:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND FALSE 2 !(!cond) [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L727] 2 l = x VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, ly=0, r=1, w=0, x=0, y=0] [L736] 2 int lx = x; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L738] COND FALSE 2 !(!(ly == lx)) VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L740] 2 l = r-1 VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [r=1, t1={7:0}, t2={8:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L724] 4 int l; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND FALSE 4 !(!cond) [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L727] 4 l = x VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L743] 2 r = l VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=0, x=0, y=0] [L714] CALL 1 __VERIFIER_atomic_take_write_lock() [L706] CALL 1 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 1 !(!cond) [L706] RET 1 assume_abort_if_not(w==0 && r==0) [L707] 1 w = 1 [L714] RET 1 __VERIFIER_atomic_take_write_lock() [L730] 4 y = l VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L733] 4 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L716] 1 x = 3 VAL [arg={0:0}, arg={0:0}, r=0, w=1, x=3, y=0] [L736] 4 int lx = x; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] [L738] COND TRUE 4 !(ly == lx) VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] [L738] 4 reach_error() VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] - UnprovableResult [Line: 749]: 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: 751]: 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: 752]: 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: 750]: 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. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 79 locations, 7 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: 23.5s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 22.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 779 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 716 mSDsluCounter, 274 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 199 mSDsCounter, 19 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1980 IncrementalHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19 mSolverCounterUnsat, 75 mSDtfsCounter, 1980 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1531occurred in iteration=6, InterpolantAutomatonStates: 59, 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 162 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 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 12:06:15,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df8af06f-acbc-42fa-9072-736980b95b7a/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