./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/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_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:44:40,142 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:44:40,231 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 10:44:40,240 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:44:40,240 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:44:40,285 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:44:40,287 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:44:40,288 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:44:40,289 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:44:40,293 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:44:40,294 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:44:40,294 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:44:40,295 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:44:40,296 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:44:40,297 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:44:40,297 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:44:40,298 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:44:40,298 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:44:40,299 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:44:40,299 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:44:40,299 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:44:40,300 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:44:40,300 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:44:40,301 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:44:40,301 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:44:40,301 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:44:40,302 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:44:40,302 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:44:40,303 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:44:40,303 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:44:40,305 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:44:40,305 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:44:40,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:44:40,305 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:44:40,306 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:44:40,306 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:44:40,306 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:44:40,306 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:44:40,306 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:44:40,307 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:44:40,307 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:44:40,307 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_3573db99-7dcc-4df7-b287-66c00e631aba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba [2023-11-26 10:44:40,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:44:40,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:44:40,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:44:40,575 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:44:40,576 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:44:40,577 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-11-26 10:44:43,734 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:44:44,026 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:44:44,028 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-11-26 10:44:44,058 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/data/218bc7acf/6ede742244e84447a290c6d799b79719/FLAGafd46f101 [2023-11-26 10:44:44,072 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/data/218bc7acf/6ede742244e84447a290c6d799b79719 [2023-11-26 10:44:44,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:44:44,077 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:44:44,079 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:44:44,079 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:44:44,085 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:44:44,086 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:44:44" (1/1) ... [2023-11-26 10:44:44,087 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c4d0da1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:44, skipping insertion in model container [2023-11-26 10:44:44,087 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:44:44" (1/1) ... [2023-11-26 10:44:44,139 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:44:44,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:44:44,818 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:44:44,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:44:45,001 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:44:45,001 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:45 WrapperNode [2023-11-26 10:44:45,002 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:44:45,003 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:44:45,004 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:44:45,004 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:44:45,013 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:45" (1/1) ... [2023-11-26 10:44:45,047 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:45" (1/1) ... [2023-11-26 10:44:45,093 INFO L138 Inliner]: procedures = 272, calls = 36, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 227 [2023-11-26 10:44:45,093 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:44:45,094 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:44:45,095 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:44:45,095 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:44:45,109 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:45" (1/1) ... [2023-11-26 10:44:45,114 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:45" (1/1) ... [2023-11-26 10:44:45,120 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:45" (1/1) ... [2023-11-26 10:44:45,149 INFO L175 MemorySlicer]: Split 20 memory accesses to 4 slices as follows [2, 5, 11, 2]. 55 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0]. The 6 writes are split as follows [0, 0, 5, 1]. [2023-11-26 10:44:45,150 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:45" (1/1) ... [2023-11-26 10:44:45,150 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:45" (1/1) ... [2023-11-26 10:44:45,168 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:45" (1/1) ... [2023-11-26 10:44:45,173 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:45" (1/1) ... [2023-11-26 10:44:45,176 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:45" (1/1) ... [2023-11-26 10:44:45,179 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:45" (1/1) ... [2023-11-26 10:44:45,183 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:44:45,184 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:44:45,184 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:44:45,184 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:44:45,185 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:45" (1/1) ... [2023-11-26 10:44:45,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:44:45,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:45,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:44:45,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:44:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:44:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:44:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 10:44:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:44:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:44:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:44:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:44:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:44:45,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:44:45,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:44:45,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:44:45,257 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 10:44:45,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:44:45,258 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-26 10:44:45,258 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-26 10:44:45,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:44:45,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:44:45,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:44:45,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:44:45,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:44:45,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:44:45,261 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 10:44:45,431 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:44:45,437 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:44:45,961 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:44:46,147 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:44:46,148 INFO L309 CfgBuilder]: Removed 25 assume(true) statements. [2023-11-26 10:44:46,148 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:44:46 BoogieIcfgContainer [2023-11-26 10:44:46,149 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:44:46,151 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:44:46,152 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:44:46,158 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:44:46,159 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:44:44" (1/3) ... [2023-11-26 10:44:46,159 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3006d6ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:44:46, skipping insertion in model container [2023-11-26 10:44:46,160 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:45" (2/3) ... [2023-11-26 10:44:46,160 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3006d6ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:44:46, skipping insertion in model container [2023-11-26 10:44:46,160 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:44:46" (3/3) ... [2023-11-26 10:44:46,161 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2023-11-26 10:44:46,181 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:44:46,182 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-11-26 10:44:46,182 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:44:46,245 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-26 10:44:46,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 141 transitions, 289 flow [2023-11-26 10:44:46,360 INFO L124 PetriNetUnfolderBase]: 44/213 cut-off events. [2023-11-26 10:44:46,361 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 10:44:46,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 213 events. 44/213 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1024 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2023-11-26 10:44:46,368 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 141 transitions, 289 flow [2023-11-26 10:44:46,375 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 141 transitions, 289 flow [2023-11-26 10:44:46,386 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:44:46,393 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3490f633, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:44:46,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-11-26 10:44:46,398 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:44:46,398 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2023-11-26 10:44:46,398 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:44:46,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:46,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-26 10:44:46,400 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 10:44:46,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:46,405 INFO L85 PathProgramCache]: Analyzing trace with hash 19093131, now seen corresponding path program 1 times [2023-11-26 10:44:46,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:46,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026342813] [2023-11-26 10:44:46,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:46,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:46,661 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 10:44:46,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:46,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026342813] [2023-11-26 10:44:46,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026342813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:46,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:46,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:44:46,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175565181] [2023-11-26 10:44:46,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:46,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:46,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:46,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:46,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:46,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2023-11-26 10:44:46,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 141 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 10:44:46,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:46,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2023-11-26 10:44:46,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:47,229 INFO L124 PetriNetUnfolderBase]: 625/2062 cut-off events. [2023-11-26 10:44:47,230 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 10:44:47,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3255 conditions, 2062 events. 625/2062 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 15821 event pairs, 525 based on Foata normal form. 394/2149 useless extension candidates. Maximal degree in co-relation 3150. Up to 1187 conditions per place. [2023-11-26 10:44:47,254 INFO L140 encePairwiseOnDemand]: 114/141 looper letters, 53 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2023-11-26 10:44:47,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 116 transitions, 349 flow [2023-11-26 10:44:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:44:47,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2023-11-26 10:44:47,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217494089834515 [2023-11-26 10:44:47,272 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2023-11-26 10:44:47,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2023-11-26 10:44:47,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:47,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2023-11-26 10:44:47,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states 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 10:44:47,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states 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 10:44:47,290 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states 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 10:44:47,292 INFO L175 Difference]: Start difference. First operand has 114 places, 141 transitions, 289 flow. Second operand 3 states and 263 transitions. [2023-11-26 10:44:47,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 116 transitions, 349 flow [2023-11-26 10:44:47,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 116 transitions, 349 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:44:47,305 INFO L231 Difference]: Finished difference. Result has 115 places, 116 transitions, 249 flow [2023-11-26 10:44:47,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=115, PETRI_TRANSITIONS=116} [2023-11-26 10:44:47,313 INFO L281 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2023-11-26 10:44:47,314 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 116 transitions, 249 flow [2023-11-26 10:44:47,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 10:44:47,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:47,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:44:47,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:44:47,315 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 10:44:47,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:47,316 INFO L85 PathProgramCache]: Analyzing trace with hash 591914480, now seen corresponding path program 1 times [2023-11-26 10:44:47,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:47,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117049680] [2023-11-26 10:44:47,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:47,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:47,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:47,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117049680] [2023-11-26 10:44:47,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117049680] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:47,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701340427] [2023-11-26 10:44:47,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:47,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:47,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:47,520 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:47,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:44:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:47,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:44:47,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:47,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:47,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701340427] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:47,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:44:47,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-26 10:44:47,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094729037] [2023-11-26 10:44:47,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:47,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:44:47,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:47,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:44:47,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:44:47,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2023-11-26 10:44:47,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 116 transitions, 249 flow. Second operand has 7 states, 7 states have (on average 62.285714285714285) internal successors, (436), 7 states have internal predecessors, (436), 0 states have call successors, (0), 0 states 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 10:44:47,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:47,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2023-11-26 10:44:47,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:48,213 INFO L124 PetriNetUnfolderBase]: 625/2065 cut-off events. [2023-11-26 10:44:48,213 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 10:44:48,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3271 conditions, 2065 events. 625/2065 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 15833 event pairs, 525 based on Foata normal form. 0/1758 useless extension candidates. Maximal degree in co-relation 3259. Up to 1187 conditions per place. [2023-11-26 10:44:48,231 INFO L140 encePairwiseOnDemand]: 138/141 looper letters, 53 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2023-11-26 10:44:48,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 119 transitions, 377 flow [2023-11-26 10:44:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:44:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:44:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 427 transitions. [2023-11-26 10:44:48,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047281323877069 [2023-11-26 10:44:48,239 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 427 transitions. [2023-11-26 10:44:48,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 427 transitions. [2023-11-26 10:44:48,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:48,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 427 transitions. [2023-11-26 10:44:48,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 0 states have call successors, (0), 0 states 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 10:44:48,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 states 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 10:44:48,252 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 states 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 10:44:48,252 INFO L175 Difference]: Start difference. First operand has 115 places, 116 transitions, 249 flow. Second operand 6 states and 427 transitions. [2023-11-26 10:44:48,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 119 transitions, 377 flow [2023-11-26 10:44:48,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 119 transitions, 373 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 10:44:48,259 INFO L231 Difference]: Finished difference. Result has 122 places, 119 transitions, 281 flow [2023-11-26 10:44:48,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=281, PETRI_PLACES=122, PETRI_TRANSITIONS=119} [2023-11-26 10:44:48,261 INFO L281 CegarLoopForPetriNet]: 114 programPoint places, 8 predicate places. [2023-11-26 10:44:48,261 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 119 transitions, 281 flow [2023-11-26 10:44:48,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 62.285714285714285) internal successors, (436), 7 states have internal predecessors, (436), 0 states have call successors, (0), 0 states 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 10:44:48,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:48,262 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-26 10:44:48,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:48,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-26 10:44:48,469 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 10:44:48,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:48,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1384247412, now seen corresponding path program 2 times [2023-11-26 10:44:48,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:48,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176951085] [2023-11-26 10:44:48,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:48,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:48,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:48,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176951085] [2023-11-26 10:44:48,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176951085] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:48,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145424449] [2023-11-26 10:44:48,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:44:48,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:48,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:48,648 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:48,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:44:48,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 10:44:48,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:44:48,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:44:48,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:48,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:44:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 10:44:48,820 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:48,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145424449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:48,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:44:48,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-11-26 10:44:48,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834677521] [2023-11-26 10:44:48,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:48,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:48,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:48,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:48,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:44:48,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 141 [2023-11-26 10:44:48,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 119 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states 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 10:44:48,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:48,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 141 [2023-11-26 10:44:48,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:49,225 INFO L124 PetriNetUnfolderBase]: 619/1982 cut-off events. [2023-11-26 10:44:49,225 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-26 10:44:49,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3212 conditions, 1982 events. 619/1982 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 15639 event pairs, 0 based on Foata normal form. 1/1672 useless extension candidates. Maximal degree in co-relation 3178. Up to 1177 conditions per place. [2023-11-26 10:44:49,246 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 80 selfloop transitions, 2 changer transitions 0/142 dead transitions. [2023-11-26 10:44:49,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 142 transitions, 491 flow [2023-11-26 10:44:49,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:49,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:44:49,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2023-11-26 10:44:49,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146572104018913 [2023-11-26 10:44:49,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2023-11-26 10:44:49,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2023-11-26 10:44:49,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:49,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2023-11-26 10:44:49,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 10:44:49,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states 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 10:44:49,252 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states 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 10:44:49,252 INFO L175 Difference]: Start difference. First operand has 122 places, 119 transitions, 281 flow. Second operand 3 states and 260 transitions. [2023-11-26 10:44:49,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 142 transitions, 491 flow [2023-11-26 10:44:49,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 142 transitions, 477 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-26 10:44:49,260 INFO L231 Difference]: Finished difference. Result has 124 places, 119 transitions, 277 flow [2023-11-26 10:44:49,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=124, PETRI_TRANSITIONS=119} [2023-11-26 10:44:49,261 INFO L281 CegarLoopForPetriNet]: 114 programPoint places, 10 predicate places. [2023-11-26 10:44:49,261 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 119 transitions, 277 flow [2023-11-26 10:44:49,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states 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 10:44:49,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:49,262 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-26 10:44:49,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:49,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:49,468 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 10:44:49,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:49,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1384247413, now seen corresponding path program 1 times [2023-11-26 10:44:49,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:49,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213016654] [2023-11-26 10:44:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:49,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 10:44:49,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:49,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213016654] [2023-11-26 10:44:49,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213016654] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:49,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:49,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:44:49,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789395303] [2023-11-26 10:44:49,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:49,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:49,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:49,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:49,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:49,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 141 [2023-11-26 10:44:49,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 119 transitions, 277 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 10:44:49,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:49,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 141 [2023-11-26 10:44:49,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:49,960 INFO L124 PetriNetUnfolderBase]: 666/2134 cut-off events. [2023-11-26 10:44:49,961 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-26 10:44:49,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3482 conditions, 2134 events. 666/2134 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 16501 event pairs, 525 based on Foata normal form. 0/1866 useless extension candidates. Maximal degree in co-relation 3453. Up to 1160 conditions per place. [2023-11-26 10:44:49,978 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 80 selfloop transitions, 2 changer transitions 0/139 dead transitions. [2023-11-26 10:44:49,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 139 transitions, 481 flow [2023-11-26 10:44:49,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:49,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:44:49,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2023-11-26 10:44:49,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933806146572104 [2023-11-26 10:44:49,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2023-11-26 10:44:49,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2023-11-26 10:44:49,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:49,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2023-11-26 10:44:49,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states 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 10:44:49,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states 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 10:44:49,985 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states 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 10:44:49,985 INFO L175 Difference]: Start difference. First operand has 124 places, 119 transitions, 277 flow. Second operand 3 states and 251 transitions. [2023-11-26 10:44:49,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 139 transitions, 481 flow [2023-11-26 10:44:49,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 139 transitions, 477 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:44:49,990 INFO L231 Difference]: Finished difference. Result has 122 places, 117 transitions, 273 flow [2023-11-26 10:44:49,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=122, PETRI_TRANSITIONS=117} [2023-11-26 10:44:49,992 INFO L281 CegarLoopForPetriNet]: 114 programPoint places, 8 predicate places. [2023-11-26 10:44:49,992 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 117 transitions, 273 flow [2023-11-26 10:44:49,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 10:44:49,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:49,993 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:49,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:44:49,993 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 10:44:49,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:49,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1696845871, now seen corresponding path program 1 times [2023-11-26 10:44:49,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:49,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799898423] [2023-11-26 10:44:49,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:49,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:44:50,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:50,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799898423] [2023-11-26 10:44:50,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799898423] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:50,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92158302] [2023-11-26 10:44:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:50,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:50,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:50,113 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:50,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:44:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:50,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:44:50,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:44:50,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:44:50,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92158302] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:50,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:44:50,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-26 10:44:50,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361746014] [2023-11-26 10:44:50,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:50,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 10:44:50,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:50,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 10:44:50,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:44:50,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2023-11-26 10:44:50,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 117 transitions, 273 flow. Second operand has 13 states, 13 states have (on average 62.30769230769231) internal successors, (810), 13 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 10:44:50,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:50,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2023-11-26 10:44:50,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:50,699 INFO L124 PetriNetUnfolderBase]: 622/2039 cut-off events. [2023-11-26 10:44:50,700 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2023-11-26 10:44:50,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3316 conditions, 2039 events. 622/2039 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 15532 event pairs, 525 based on Foata normal form. 6/1778 useless extension candidates. Maximal degree in co-relation 3263. Up to 1163 conditions per place. [2023-11-26 10:44:50,716 INFO L140 encePairwiseOnDemand]: 138/141 looper letters, 53 selfloop transitions, 11 changer transitions 0/123 dead transitions. [2023-11-26 10:44:50,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 123 transitions, 437 flow [2023-11-26 10:44:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:44:50,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 10:44:50,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 802 transitions. [2023-11-26 10:44:50,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4739952718676123 [2023-11-26 10:44:50,721 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 802 transitions. [2023-11-26 10:44:50,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 802 transitions. [2023-11-26 10:44:50,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:50,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 802 transitions. [2023-11-26 10:44:50,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 66.83333333333333) internal successors, (802), 12 states have internal predecessors, (802), 0 states have call successors, (0), 0 states 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 10:44:50,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 141.0) internal successors, (1833), 13 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states 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 10:44:50,730 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 141.0) internal successors, (1833), 13 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states 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 10:44:50,731 INFO L175 Difference]: Start difference. First operand has 122 places, 117 transitions, 273 flow. Second operand 12 states and 802 transitions. [2023-11-26 10:44:50,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 123 transitions, 437 flow [2023-11-26 10:44:50,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 123 transitions, 433 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:44:50,736 INFO L231 Difference]: Finished difference. Result has 137 places, 123 transitions, 353 flow [2023-11-26 10:44:50,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=353, PETRI_PLACES=137, PETRI_TRANSITIONS=123} [2023-11-26 10:44:50,737 INFO L281 CegarLoopForPetriNet]: 114 programPoint places, 23 predicate places. [2023-11-26 10:44:50,737 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 123 transitions, 353 flow [2023-11-26 10:44:50,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 62.30769230769231) internal successors, (810), 13 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 10:44:50,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:50,748 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:50,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:50,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:50,955 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 10:44:50,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:50,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1073670831, now seen corresponding path program 2 times [2023-11-26 10:44:50,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:50,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203383354] [2023-11-26 10:44:50,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:50,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 10:44:51,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:51,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203383354] [2023-11-26 10:44:51,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203383354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:51,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362758575] [2023-11-26 10:44:51,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:44:51,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:51,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:51,150 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:51,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:44:51,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:44:51,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:44:51,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:44:51,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:51,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:44:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 10:44:51,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:51,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362758575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:51,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:44:51,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2023-11-26 10:44:51,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671355300] [2023-11-26 10:44:51,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:51,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:44:51,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:51,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:44:51,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:44:51,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 141 [2023-11-26 10:44:51,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 123 transitions, 353 flow. Second operand has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states 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 10:44:51,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:51,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 141 [2023-11-26 10:44:51,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:51,969 INFO L124 PetriNetUnfolderBase]: 621/2014 cut-off events. [2023-11-26 10:44:51,969 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-26 10:44:51,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3315 conditions, 2014 events. 621/2014 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 15558 event pairs, 110 based on Foata normal form. 22/1778 useless extension candidates. Maximal degree in co-relation 3238. Up to 1078 conditions per place. [2023-11-26 10:44:51,985 INFO L140 encePairwiseOnDemand]: 136/141 looper letters, 127 selfloop transitions, 4 changer transitions 0/189 dead transitions. [2023-11-26 10:44:51,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 189 transitions, 745 flow [2023-11-26 10:44:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:44:51,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:44:51,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 422 transitions. [2023-11-26 10:44:51,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5985815602836879 [2023-11-26 10:44:51,989 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 422 transitions. [2023-11-26 10:44:51,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 422 transitions. [2023-11-26 10:44:51,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:51,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 422 transitions. [2023-11-26 10:44:51,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 10:44:51,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states 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 10:44:51,996 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states 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 10:44:51,996 INFO L175 Difference]: Start difference. First operand has 137 places, 123 transitions, 353 flow. Second operand 5 states and 422 transitions. [2023-11-26 10:44:51,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 189 transitions, 745 flow [2023-11-26 10:44:52,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 189 transitions, 697 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-26 10:44:52,005 INFO L231 Difference]: Finished difference. Result has 136 places, 123 transitions, 316 flow [2023-11-26 10:44:52,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=316, PETRI_PLACES=136, PETRI_TRANSITIONS=123} [2023-11-26 10:44:52,008 INFO L281 CegarLoopForPetriNet]: 114 programPoint places, 22 predicate places. [2023-11-26 10:44:52,009 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 123 transitions, 316 flow [2023-11-26 10:44:52,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states 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 10:44:52,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:52,011 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2023-11-26 10:44:52,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:52,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:52,217 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 10:44:52,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:52,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1075943307, now seen corresponding path program 1 times [2023-11-26 10:44:52,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:52,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110186549] [2023-11-26 10:44:52,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:52,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:44:52,247 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 10:44:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:44:52,285 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 10:44:52,285 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 10:44:52,286 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2023-11-26 10:44:52,288 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2023-11-26 10:44:52,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2023-11-26 10:44:52,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2023-11-26 10:44:52,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2023-11-26 10:44:52,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (33 of 39 remaining) [2023-11-26 10:44:52,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2023-11-26 10:44:52,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2023-11-26 10:44:52,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2023-11-26 10:44:52,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2023-11-26 10:44:52,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2023-11-26 10:44:52,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2023-11-26 10:44:52,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2023-11-26 10:44:52,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2023-11-26 10:44:52,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2023-11-26 10:44:52,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2023-11-26 10:44:52,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2023-11-26 10:44:52,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2023-11-26 10:44:52,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2023-11-26 10:44:52,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2023-11-26 10:44:52,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2023-11-26 10:44:52,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2023-11-26 10:44:52,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2023-11-26 10:44:52,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2023-11-26 10:44:52,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2023-11-26 10:44:52,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2023-11-26 10:44:52,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2023-11-26 10:44:52,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2023-11-26 10:44:52,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2023-11-26 10:44:52,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2023-11-26 10:44:52,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2023-11-26 10:44:52,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2023-11-26 10:44:52,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2023-11-26 10:44:52,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2023-11-26 10:44:52,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2023-11-26 10:44:52,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2023-11-26 10:44:52,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2023-11-26 10:44:52,295 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2023-11-26 10:44:52,295 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2023-11-26 10:44:52,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:44:52,295 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2023-11-26 10:44:52,298 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-26 10:44:52,298 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-26 10:44:52,351 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 10:44:52,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 204 transitions, 424 flow [2023-11-26 10:44:52,399 INFO L124 PetriNetUnfolderBase]: 74/360 cut-off events. [2023-11-26 10:44:52,399 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-26 10:44:52,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 360 events. 74/360 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2061 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 215. Up to 12 conditions per place. [2023-11-26 10:44:52,402 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 204 transitions, 424 flow [2023-11-26 10:44:52,410 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 204 transitions, 424 flow [2023-11-26 10:44:52,411 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:44:52,412 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3490f633, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:44:52,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-11-26 10:44:52,413 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:44:52,414 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2023-11-26 10:44:52,414 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:44:52,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:52,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-26 10:44:52,414 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-26 10:44:52,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:52,415 INFO L85 PathProgramCache]: Analyzing trace with hash 25373067, now seen corresponding path program 1 times [2023-11-26 10:44:52,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:52,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293817365] [2023-11-26 10:44:52,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:52,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:52,445 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 10:44:52,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:52,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293817365] [2023-11-26 10:44:52,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293817365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:52,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:52,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:44:52,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014739165] [2023-11-26 10:44:52,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:52,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:52,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:52,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:52,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:52,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 204 [2023-11-26 10:44:52,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 204 transitions, 424 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 10:44:52,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:52,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 204 [2023-11-26 10:44:52,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:59,752 INFO L124 PetriNetUnfolderBase]: 27581/60837 cut-off events. [2023-11-26 10:44:59,752 INFO L125 PetriNetUnfolderBase]: For 195/200 co-relation queries the response was YES. [2023-11-26 10:44:59,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100897 conditions, 60837 events. 27581/60837 cut-off events. For 195/200 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 679960 event pairs, 24192 based on Foata normal form. 13675/66308 useless extension candidates. Maximal degree in co-relation 93084. Up to 39942 conditions per place. [2023-11-26 10:45:00,196 INFO L140 encePairwiseOnDemand]: 165/204 looper letters, 77 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2023-11-26 10:45:00,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 166 transitions, 506 flow [2023-11-26 10:45:00,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:45:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:45:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-11-26 10:45:00,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160130718954249 [2023-11-26 10:45:00,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-11-26 10:45:00,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-11-26 10:45:00,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:00,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-11-26 10:45:00,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:00,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states 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 10:45:00,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states 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 10:45:00,206 INFO L175 Difference]: Start difference. First operand has 164 places, 204 transitions, 424 flow. Second operand 3 states and 377 transitions. [2023-11-26 10:45:00,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 166 transitions, 506 flow [2023-11-26 10:45:00,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 166 transitions, 506 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:45:00,213 INFO L231 Difference]: Finished difference. Result has 164 places, 166 transitions, 358 flow [2023-11-26 10:45:00,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=164, PETRI_TRANSITIONS=166} [2023-11-26 10:45:00,215 INFO L281 CegarLoopForPetriNet]: 164 programPoint places, 0 predicate places. [2023-11-26 10:45:00,215 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 166 transitions, 358 flow [2023-11-26 10:45:00,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 10:45:00,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:00,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:45:00,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 10:45:00,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-26 10:45:00,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:00,217 INFO L85 PathProgramCache]: Analyzing trace with hash 786592699, now seen corresponding path program 1 times [2023-11-26 10:45:00,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:00,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409785996] [2023-11-26 10:45:00,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:00,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:00,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:00,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409785996] [2023-11-26 10:45:00,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409785996] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:00,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022599593] [2023-11-26 10:45:00,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:00,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:00,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:00,268 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:00,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:45:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:00,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:45:00,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:00,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:00,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022599593] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:00,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:00,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-26 10:45:00,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087885763] [2023-11-26 10:45:00,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:00,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:45:00,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:00,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:45:00,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:45:00,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 204 [2023-11-26 10:45:00,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 166 transitions, 358 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:00,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:00,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 204 [2023-11-26 10:45:00,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:06,260 INFO L124 PetriNetUnfolderBase]: 27581/60840 cut-off events. [2023-11-26 10:45:06,261 INFO L125 PetriNetUnfolderBase]: For 200/205 co-relation queries the response was YES. [2023-11-26 10:45:06,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100913 conditions, 60840 events. 27581/60840 cut-off events. For 200/205 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 680011 event pairs, 24192 based on Foata normal form. 0/52636 useless extension candidates. Maximal degree in co-relation 100900. Up to 39942 conditions per place. [2023-11-26 10:45:06,692 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 77 selfloop transitions, 5 changer transitions 0/169 dead transitions. [2023-11-26 10:45:06,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 169 transitions, 534 flow [2023-11-26 10:45:06,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:45:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:45:06,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 607 transitions. [2023-11-26 10:45:06,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959150326797386 [2023-11-26 10:45:06,696 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 607 transitions. [2023-11-26 10:45:06,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 607 transitions. [2023-11-26 10:45:06,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:06,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 607 transitions. [2023-11-26 10:45:06,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 101.16666666666667) internal successors, (607), 6 states have internal predecessors, (607), 0 states have call successors, (0), 0 states 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 10:45:06,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 10:45:06,702 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 10:45:06,702 INFO L175 Difference]: Start difference. First operand has 164 places, 166 transitions, 358 flow. Second operand 6 states and 607 transitions. [2023-11-26 10:45:06,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 169 transitions, 534 flow [2023-11-26 10:45:06,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 169 transitions, 530 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 10:45:06,708 INFO L231 Difference]: Finished difference. Result has 171 places, 169 transitions, 390 flow [2023-11-26 10:45:06,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=390, PETRI_PLACES=171, PETRI_TRANSITIONS=169} [2023-11-26 10:45:06,711 INFO L281 CegarLoopForPetriNet]: 164 programPoint places, 7 predicate places. [2023-11-26 10:45:06,711 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 169 transitions, 390 flow [2023-11-26 10:45:06,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:06,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:06,712 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-26 10:45:06,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:06,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:06,919 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-26 10:45:06,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:06,920 INFO L85 PathProgramCache]: Analyzing trace with hash 68957579, now seen corresponding path program 2 times [2023-11-26 10:45:06,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:06,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603033107] [2023-11-26 10:45:06,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:06,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 10:45:06,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:06,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603033107] [2023-11-26 10:45:06,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603033107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:06,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:06,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:45:06,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824840577] [2023-11-26 10:45:06,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:06,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:45:06,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:06,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:45:06,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:07,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 204 [2023-11-26 10:45:07,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 169 transitions, 390 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 10:45:07,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:07,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 204 [2023-11-26 10:45:07,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:13,262 INFO L124 PetriNetUnfolderBase]: 29604/64368 cut-off events. [2023-11-26 10:45:13,262 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-11-26 10:45:13,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107514 conditions, 64368 events. 29604/64368 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 1770. Compared 719925 event pairs, 24171 based on Foata normal form. 0/55924 useless extension candidates. Maximal degree in co-relation 107479. Up to 39895 conditions per place. [2023-11-26 10:45:13,826 INFO L140 encePairwiseOnDemand]: 200/204 looper letters, 126 selfloop transitions, 2 changer transitions 0/211 dead transitions. [2023-11-26 10:45:13,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 211 transitions, 730 flow [2023-11-26 10:45:13,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:45:13,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:45:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-11-26 10:45:13,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6127450980392157 [2023-11-26 10:45:13,829 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-11-26 10:45:13,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-11-26 10:45:13,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:13,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-11-26 10:45:13,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:13,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states 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 10:45:13,834 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states 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 10:45:13,834 INFO L175 Difference]: Start difference. First operand has 171 places, 169 transitions, 390 flow. Second operand 3 states and 375 transitions. [2023-11-26 10:45:13,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 211 transitions, 730 flow [2023-11-26 10:45:13,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 211 transitions, 716 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-26 10:45:13,840 INFO L231 Difference]: Finished difference. Result has 170 places, 167 transitions, 376 flow [2023-11-26 10:45:13,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=376, PETRI_PLACES=170, PETRI_TRANSITIONS=167} [2023-11-26 10:45:13,841 INFO L281 CegarLoopForPetriNet]: 164 programPoint places, 6 predicate places. [2023-11-26 10:45:13,841 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 167 transitions, 376 flow [2023-11-26 10:45:13,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 10:45:13,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:13,842 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-26 10:45:13,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 10:45:13,842 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-26 10:45:13,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:13,843 INFO L85 PathProgramCache]: Analyzing trace with hash 68957580, now seen corresponding path program 1 times [2023-11-26 10:45:13,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:13,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944821765] [2023-11-26 10:45:13,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:13,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:13,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:13,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944821765] [2023-11-26 10:45:13,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944821765] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:13,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691179597] [2023-11-26 10:45:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:13,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:13,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:13,933 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:13,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:45:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:14,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:45:14,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:14,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:14,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691179597] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:14,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:14,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-26 10:45:14,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782319902] [2023-11-26 10:45:14,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:14,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 10:45:14,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:14,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 10:45:14,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:45:14,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 204 [2023-11-26 10:45:14,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 167 transitions, 376 flow. Second operand has 13 states, 13 states have (on average 88.15384615384616) internal successors, (1146), 13 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 10:45:14,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:14,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 204 [2023-11-26 10:45:14,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:20,141 INFO L124 PetriNetUnfolderBase]: 27581/60830 cut-off events. [2023-11-26 10:45:20,141 INFO L125 PetriNetUnfolderBase]: For 765/770 co-relation queries the response was YES. [2023-11-26 10:45:20,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101458 conditions, 60830 events. 27581/60830 cut-off events. For 765/770 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 679847 event pairs, 24192 based on Foata normal form. 6/52649 useless extension candidates. Maximal degree in co-relation 101405. Up to 39942 conditions per place. [2023-11-26 10:45:20,742 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 77 selfloop transitions, 11 changer transitions 0/173 dead transitions. [2023-11-26 10:45:20,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 173 transitions, 588 flow [2023-11-26 10:45:20,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:45:20,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 10:45:20,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1138 transitions. [2023-11-26 10:45:20,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46486928104575165 [2023-11-26 10:45:20,750 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1138 transitions. [2023-11-26 10:45:20,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1138 transitions. [2023-11-26 10:45:20,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:20,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1138 transitions. [2023-11-26 10:45:20,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 94.83333333333333) internal successors, (1138), 12 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states 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 10:45:20,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 204.0) internal successors, (2652), 13 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states 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 10:45:20,762 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 204.0) internal successors, (2652), 13 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states 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 10:45:20,762 INFO L175 Difference]: Start difference. First operand has 170 places, 167 transitions, 376 flow. Second operand 12 states and 1138 transitions. [2023-11-26 10:45:20,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 173 transitions, 588 flow [2023-11-26 10:45:20,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 173 transitions, 584 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:45:20,771 INFO L231 Difference]: Finished difference. Result has 185 places, 173 transitions, 456 flow [2023-11-26 10:45:20,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=456, PETRI_PLACES=185, PETRI_TRANSITIONS=173} [2023-11-26 10:45:20,772 INFO L281 CegarLoopForPetriNet]: 164 programPoint places, 21 predicate places. [2023-11-26 10:45:20,772 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 173 transitions, 456 flow [2023-11-26 10:45:20,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 88.15384615384616) internal successors, (1146), 13 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 10:45:20,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:20,773 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-11-26 10:45:20,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:20,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:20,984 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-26 10:45:20,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:20,985 INFO L85 PathProgramCache]: Analyzing trace with hash 613582732, now seen corresponding path program 2 times [2023-11-26 10:45:20,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:20,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90529290] [2023-11-26 10:45:20,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:20,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 10:45:21,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:21,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90529290] [2023-11-26 10:45:21,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90529290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:21,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:21,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:45:21,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594291514] [2023-11-26 10:45:21,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:21,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:45:21,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:21,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:45:21,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:21,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 204 [2023-11-26 10:45:21,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 173 transitions, 456 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states 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 10:45:21,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:21,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 204 [2023-11-26 10:45:21,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:27,329 INFO L124 PetriNetUnfolderBase]: 27992/60918 cut-off events. [2023-11-26 10:45:27,329 INFO L125 PetriNetUnfolderBase]: For 280/324 co-relation queries the response was YES. [2023-11-26 10:45:27,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102013 conditions, 60918 events. 27992/60918 cut-off events. For 280/324 co-relation queries the response was YES. Maximal size of possible extension queue 1737. Compared 681497 event pairs, 12096 based on Foata normal form. 1/52872 useless extension candidates. Maximal degree in co-relation 101936. Up to 40894 conditions per place. [2023-11-26 10:45:27,676 INFO L140 encePairwiseOnDemand]: 200/204 looper letters, 111 selfloop transitions, 2 changer transitions 0/197 dead transitions. [2023-11-26 10:45:27,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 197 transitions, 730 flow [2023-11-26 10:45:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:45:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:45:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-11-26 10:45:27,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5931372549019608 [2023-11-26 10:45:27,678 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-11-26 10:45:27,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-11-26 10:45:27,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:27,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-11-26 10:45:27,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states 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 10:45:27,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states 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 10:45:27,681 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states 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 10:45:27,681 INFO L175 Difference]: Start difference. First operand has 185 places, 173 transitions, 456 flow. Second operand 3 states and 363 transitions. [2023-11-26 10:45:27,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 197 transitions, 730 flow [2023-11-26 10:45:27,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 197 transitions, 682 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-26 10:45:27,687 INFO L231 Difference]: Finished difference. Result has 183 places, 174 transitions, 422 flow [2023-11-26 10:45:27,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=422, PETRI_PLACES=183, PETRI_TRANSITIONS=174} [2023-11-26 10:45:27,688 INFO L281 CegarLoopForPetriNet]: 164 programPoint places, 19 predicate places. [2023-11-26 10:45:27,688 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 174 transitions, 422 flow [2023-11-26 10:45:27,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states 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 10:45:27,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:27,688 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:27,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 10:45:27,689 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-26 10:45:27,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:27,689 INFO L85 PathProgramCache]: Analyzing trace with hash 57685364, now seen corresponding path program 1 times [2023-11-26 10:45:27,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:27,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751164064] [2023-11-26 10:45:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:27,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 10:45:27,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:27,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751164064] [2023-11-26 10:45:27,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751164064] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:27,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482077094] [2023-11-26 10:45:27,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:27,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:27,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:27,849 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:27,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:45:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:27,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:45:27,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:27,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:45:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 10:45:28,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 10:45:28,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482077094] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:28,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:28,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-26 10:45:28,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081217885] [2023-11-26 10:45:28,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:28,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:45:28,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:28,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:45:28,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:45:28,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 204 [2023-11-26 10:45:28,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 174 transitions, 422 flow. Second operand has 7 states, 7 states have (on average 87.71428571428571) internal successors, (614), 7 states have internal predecessors, (614), 0 states have call successors, (0), 0 states 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 10:45:28,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:28,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 204 [2023-11-26 10:45:28,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:34,559 INFO L124 PetriNetUnfolderBase]: 27420/58111 cut-off events. [2023-11-26 10:45:34,559 INFO L125 PetriNetUnfolderBase]: For 1194/1194 co-relation queries the response was YES. [2023-11-26 10:45:34,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99629 conditions, 58111 events. 27420/58111 cut-off events. For 1194/1194 co-relation queries the response was YES. Maximal size of possible extension queue 1713. Compared 638529 event pairs, 2441 based on Foata normal form. 528/51650 useless extension candidates. Maximal degree in co-relation 99575. Up to 34848 conditions per place. [2023-11-26 10:45:34,869 INFO L140 encePairwiseOnDemand]: 200/204 looper letters, 200 selfloop transitions, 4 changer transitions 0/287 dead transitions. [2023-11-26 10:45:34,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 287 transitions, 1054 flow [2023-11-26 10:45:34,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:45:34,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:45:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 622 transitions. [2023-11-26 10:45:34,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098039215686275 [2023-11-26 10:45:34,872 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 622 transitions. [2023-11-26 10:45:34,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 622 transitions. [2023-11-26 10:45:34,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:34,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 622 transitions. [2023-11-26 10:45:34,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.4) internal successors, (622), 5 states have internal predecessors, (622), 0 states have call successors, (0), 0 states 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 10:45:34,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states 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 10:45:34,878 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states 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 10:45:34,878 INFO L175 Difference]: Start difference. First operand has 183 places, 174 transitions, 422 flow. Second operand 5 states and 622 transitions. [2023-11-26 10:45:34,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 287 transitions, 1054 flow [2023-11-26 10:45:34,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 287 transitions, 1052 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:45:34,887 INFO L231 Difference]: Finished difference. Result has 185 places, 173 transitions, 424 flow [2023-11-26 10:45:34,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=424, PETRI_PLACES=185, PETRI_TRANSITIONS=173} [2023-11-26 10:45:34,888 INFO L281 CegarLoopForPetriNet]: 164 programPoint places, 21 predicate places. [2023-11-26 10:45:34,888 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 173 transitions, 424 flow [2023-11-26 10:45:34,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 87.71428571428571) internal successors, (614), 7 states have internal predecessors, (614), 0 states have call successors, (0), 0 states 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 10:45:34,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:34,889 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 3, 2, 1, 1, 1, 1, 1] [2023-11-26 10:45:34,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:35,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3573db99-7dcc-4df7-b287-66c00e631aba/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 10:45:35,094 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-26 10:45:35,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:35,095 INFO L85 PathProgramCache]: Analyzing trace with hash 271538026, now seen corresponding path program 1 times [2023-11-26 10:45:35,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:35,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317707779] [2023-11-26 10:45:35,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:35,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:45:35,134 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 10:45:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:45:35,178 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 10:45:35,178 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 10:45:35,178 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2023-11-26 10:45:35,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2023-11-26 10:45:35,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2023-11-26 10:45:35,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2023-11-26 10:45:35,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2023-11-26 10:45:35,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (44 of 50 remaining) [2023-11-26 10:45:35,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2023-11-26 10:45:35,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2023-11-26 10:45:35,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2023-11-26 10:45:35,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2023-11-26 10:45:35,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2023-11-26 10:45:35,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2023-11-26 10:45:35,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2023-11-26 10:45:35,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2023-11-26 10:45:35,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2023-11-26 10:45:35,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2023-11-26 10:45:35,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2023-11-26 10:45:35,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2023-11-26 10:45:35,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2023-11-26 10:45:35,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2023-11-26 10:45:35,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2023-11-26 10:45:35,185 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2023-11-26 10:45:35,185 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2023-11-26 10:45:35,185 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2023-11-26 10:45:35,185 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2023-11-26 10:45:35,185 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2023-11-26 10:45:35,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2023-11-26 10:45:35,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2023-11-26 10:45:35,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2023-11-26 10:45:35,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2023-11-26 10:45:35,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2023-11-26 10:45:35,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2023-11-26 10:45:35,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2023-11-26 10:45:35,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2023-11-26 10:45:35,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2023-11-26 10:45:35,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2023-11-26 10:45:35,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2023-11-26 10:45:35,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2023-11-26 10:45:35,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2023-11-26 10:45:35,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2023-11-26 10:45:35,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2023-11-26 10:45:35,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2023-11-26 10:45:35,189 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2023-11-26 10:45:35,189 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2023-11-26 10:45:35,189 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2023-11-26 10:45:35,189 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2023-11-26 10:45:35,189 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2023-11-26 10:45:35,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2023-11-26 10:45:35,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2023-11-26 10:45:35,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2023-11-26 10:45:35,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 10:45:35,190 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2023-11-26 10:45:35,191 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-26 10:45:35,191 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-26 10:45:35,263 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 10:45:35,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 267 transitions, 561 flow [2023-11-26 10:45:35,338 INFO L124 PetriNetUnfolderBase]: 107/528 cut-off events. [2023-11-26 10:45:35,338 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-26 10:45:35,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 528 events. 107/528 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3317 event pairs, 1 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 369. Up to 16 conditions per place. [2023-11-26 10:45:35,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 214 places, 267 transitions, 561 flow [2023-11-26 10:45:35,357 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 267 transitions, 561 flow [2023-11-26 10:45:35,359 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:45:35,359 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3490f633, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:45:35,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2023-11-26 10:45:35,361 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:45:35,361 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2023-11-26 10:45:35,361 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:45:35,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:35,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-26 10:45:35,362 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-11-26 10:45:35,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:35,362 INFO L85 PathProgramCache]: Analyzing trace with hash 33592395, now seen corresponding path program 1 times [2023-11-26 10:45:35,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:35,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015088335] [2023-11-26 10:45:35,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:35,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:35,386 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 10:45:35,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:35,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015088335] [2023-11-26 10:45:35,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015088335] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:35,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:35,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:45:35,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726318774] [2023-11-26 10:45:35,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:35,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:45:35,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:35,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:45:35,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:35,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 267 [2023-11-26 10:45:35,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 267 transitions, 561 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states 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 10:45:35,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:35,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 267 [2023-11-26 10:45:35,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand