./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/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_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/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_f9994fe1-91f0-4a70-93be-bf31a79ea74a/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 a479da07a0fc6d1ad250c3f67241d6294523a3c8fee4f6d465a7a5bdc9204f86 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:49:04,931 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:49:05,039 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 10:49:05,046 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:49:05,047 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:49:05,079 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:49:05,080 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:49:05,081 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:49:05,081 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:49:05,086 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:49:05,087 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:49:05,088 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:49:05,089 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:49:05,090 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:49:05,091 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:49:05,091 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:49:05,092 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:49:05,092 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:49:05,092 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:49:05,093 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:49:05,093 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:49:05,094 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:49:05,094 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:49:05,095 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:49:05,095 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:49:05,095 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:49:05,096 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:49:05,096 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:49:05,097 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:49:05,098 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:49:05,099 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:49:05,099 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:49:05,099 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:49:05,100 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:49:05,100 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:49:05,100 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:49:05,100 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:49:05,101 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:49:05,101 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:49:05,101 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:49:05,101 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:49:05,102 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_f9994fe1-91f0-4a70-93be-bf31a79ea74a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a479da07a0fc6d1ad250c3f67241d6294523a3c8fee4f6d465a7a5bdc9204f86 [2023-11-26 10:49:05,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:49:05,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:49:05,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:49:05,394 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:49:05,394 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:49:05,395 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2023-11-26 10:49:08,543 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:49:08,865 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:49:08,866 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2023-11-26 10:49:08,877 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/data/5faf56d5d/b85dee11d3fb4eae962db5eb4c05575c/FLAGb0258667f [2023-11-26 10:49:08,896 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/data/5faf56d5d/b85dee11d3fb4eae962db5eb4c05575c [2023-11-26 10:49:08,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:49:08,903 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:49:08,907 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:08,907 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:49:08,913 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:49:08,914 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:08" (1/1) ... [2023-11-26 10:49:08,915 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47011aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:08, skipping insertion in model container [2023-11-26 10:49:08,915 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:08" (1/1) ... [2023-11-26 10:49:08,945 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:49:09,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:49:09,175 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:49:09,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:49:09,204 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:49:09,205 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:49:09,213 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:49:09,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09 WrapperNode [2023-11-26 10:49:09,214 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:09,215 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:49:09,215 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:49:09,215 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:49:09,223 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,232 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,257 INFO L138 Inliner]: procedures = 21, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 77 [2023-11-26 10:49:09,257 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:49:09,258 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:49:09,259 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:49:09,259 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:49:09,270 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,273 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,289 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-26 10:49:09,289 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,289 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,295 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,299 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,301 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,303 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,306 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:49:09,307 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:49:09,307 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:49:09,307 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:49:09,308 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:49:09,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:09,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:49:09,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:49:09,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:49:09,403 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 10:49:09,404 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 10:49:09,404 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 10:49:09,404 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 10:49:09,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:49:09,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:49:09,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:49:09,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:49:09,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:49:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:49:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:49:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 10:49:09,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 10:49:09,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:49:09,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:49:09,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:49:09,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:49:09,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:49:09,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:49:09,413 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 10:49:09,528 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:49:09,530 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:49:09,777 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:49:09,957 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:49:09,958 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 10:49:09,958 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:49:09 BoogieIcfgContainer [2023-11-26 10:49:09,958 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:49:09,961 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:49:09,961 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:49:09,966 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:49:09,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:49:08" (1/3) ... [2023-11-26 10:49:09,967 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea5d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:49:09, skipping insertion in model container [2023-11-26 10:49:09,967 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (2/3) ... [2023-11-26 10:49:09,967 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea5d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:49:09, skipping insertion in model container [2023-11-26 10:49:09,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:49:09" (3/3) ... [2023-11-26 10:49:09,969 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2023-11-26 10:49:09,991 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:49:09,991 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-26 10:49:09,991 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:49:10,049 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 10:49:10,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 37 transitions, 88 flow [2023-11-26 10:49:10,150 INFO L124 PetriNetUnfolderBase]: 2/35 cut-off events. [2023-11-26 10:49:10,150 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 10:49:10,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 2/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 58 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2023-11-26 10:49:10,155 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 37 transitions, 88 flow [2023-11-26 10:49:10,159 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 34 transitions, 80 flow [2023-11-26 10:49:10,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:49:10,190 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;@6e914ef0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:49:10,191 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-26 10:49:10,197 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:49:10,197 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-26 10:49:10,198 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:49:10,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:10,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 10:49:10,200 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:10,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:10,209 INFO L85 PathProgramCache]: Analyzing trace with hash 8762, now seen corresponding path program 1 times [2023-11-26 10:49:10,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:10,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755432603] [2023-11-26 10:49:10,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:10,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:10,642 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 10:49:10,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:10,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755432603] [2023-11-26 10:49:10,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755432603] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:10,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:10,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:49:10,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016649004] [2023-11-26 10:49:10,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:10,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:10,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:10,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:10,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:10,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-26 10:49:10,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 10:49:10,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:10,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-26 10:49:10,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:10,895 INFO L124 PetriNetUnfolderBase]: 71/160 cut-off events. [2023-11-26 10:49:10,895 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-26 10:49:10,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 160 events. 71/160 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 521 event pairs, 47 based on Foata normal form. 1/145 useless extension candidates. Maximal degree in co-relation 243. Up to 121 conditions per place. [2023-11-26 10:49:10,903 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 16 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-11-26 10:49:10,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 106 flow [2023-11-26 10:49:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:49:10,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-26 10:49:10,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126126126126126 [2023-11-26 10:49:10,921 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-26 10:49:10,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-26 10:49:10,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:10,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-26 10:49:10,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 10:49:10,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 10:49:10,932 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 10:49:10,934 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 80 flow. Second operand 3 states and 68 transitions. [2023-11-26 10:49:10,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 106 flow [2023-11-26 10:49:10,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 10:49:10,940 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 66 flow [2023-11-26 10:49:10,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-11-26 10:49:10,946 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -6 predicate places. [2023-11-26 10:49:10,946 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 66 flow [2023-11-26 10:49:10,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 10:49:10,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:10,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 10:49:10,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:49:10,948 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:10,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:10,949 INFO L85 PathProgramCache]: Analyzing trace with hash 8763, now seen corresponding path program 1 times [2023-11-26 10:49:10,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:10,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731116255] [2023-11-26 10:49:10,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:10,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:11,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:11,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731116255] [2023-11-26 10:49:11,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731116255] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:11,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:11,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:49:11,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681144652] [2023-11-26 10:49:11,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:11,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:11,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:11,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:11,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:11,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-26 10:49:11,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 10:49:11,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:11,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-26 10:49:11,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:11,270 INFO L124 PetriNetUnfolderBase]: 47/119 cut-off events. [2023-11-26 10:49:11,270 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2023-11-26 10:49:11,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 119 events. 47/119 cut-off events. For 5/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 360 event pairs, 30 based on Foata normal form. 13/117 useless extension candidates. Maximal degree in co-relation 205. Up to 84 conditions per place. [2023-11-26 10:49:11,272 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 14 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-11-26 10:49:11,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 28 transitions, 92 flow [2023-11-26 10:49:11,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:49:11,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2023-11-26 10:49:11,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6396396396396397 [2023-11-26 10:49:11,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 71 transitions. [2023-11-26 10:49:11,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 71 transitions. [2023-11-26 10:49:11,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:11,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 71 transitions. [2023-11-26 10:49:11,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 10:49:11,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 10:49:11,278 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 10:49:11,278 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 66 flow. Second operand 3 states and 71 transitions. [2023-11-26 10:49:11,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 28 transitions, 92 flow [2023-11-26 10:49:11,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 28 transitions, 91 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:49:11,281 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 63 flow [2023-11-26 10:49:11,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-11-26 10:49:11,282 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -7 predicate places. [2023-11-26 10:49:11,282 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 63 flow [2023-11-26 10:49:11,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 10:49:11,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:11,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:49:11,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:49:11,283 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:11,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:11,284 INFO L85 PathProgramCache]: Analyzing trace with hash 261261817, now seen corresponding path program 1 times [2023-11-26 10:49:11,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:11,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905980296] [2023-11-26 10:49:11,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:11,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:11,352 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 10:49:11,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:11,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905980296] [2023-11-26 10:49:11,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905980296] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:11,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:11,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:49:11,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70982461] [2023-11-26 10:49:11,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:11,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:11,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:11,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:11,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:11,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-26 10:49:11,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 10:49:11,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:11,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-26 10:49:11,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:11,466 INFO L124 PetriNetUnfolderBase]: 54/123 cut-off events. [2023-11-26 10:49:11,466 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-26 10:49:11,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 123 events. 54/123 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 349 event pairs, 35 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 223. Up to 98 conditions per place. [2023-11-26 10:49:11,468 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 16 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-11-26 10:49:11,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 93 flow [2023-11-26 10:49:11,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:11,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:49:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2023-11-26 10:49:11,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036036036036037 [2023-11-26 10:49:11,471 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 67 transitions. [2023-11-26 10:49:11,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 67 transitions. [2023-11-26 10:49:11,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:11,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 67 transitions. [2023-11-26 10:49:11,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 10:49:11,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 10:49:11,474 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 10:49:11,474 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 63 flow. Second operand 3 states and 67 transitions. [2023-11-26 10:49:11,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 93 flow [2023-11-26 10:49:11,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 26 transitions, 92 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:49:11,476 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 60 flow [2023-11-26 10:49:11,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-26 10:49:11,478 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -8 predicate places. [2023-11-26 10:49:11,478 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 60 flow [2023-11-26 10:49:11,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 10:49:11,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:11,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:49:11,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:49:11,480 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:11,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:11,480 INFO L85 PathProgramCache]: Analyzing trace with hash 261261818, now seen corresponding path program 1 times [2023-11-26 10:49:11,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:11,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934709242] [2023-11-26 10:49:11,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:11,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:11,591 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 10:49:11,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:11,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934709242] [2023-11-26 10:49:11,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934709242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:11,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:11,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:49:11,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366254096] [2023-11-26 10:49:11,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:11,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:11,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:11,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:11,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:11,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-26 10:49:11,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 10:49:11,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:11,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-26 10:49:11,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:11,737 INFO L124 PetriNetUnfolderBase]: 47/111 cut-off events. [2023-11-26 10:49:11,737 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2023-11-26 10:49:11,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 111 events. 47/111 cut-off events. For 5/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 318 event pairs, 30 based on Foata normal form. 6/110 useless extension candidates. Maximal degree in co-relation 197. Up to 84 conditions per place. [2023-11-26 10:49:11,743 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 14 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-11-26 10:49:11,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 24 transitions, 86 flow [2023-11-26 10:49:11,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:11,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:49:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2023-11-26 10:49:11,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6396396396396397 [2023-11-26 10:49:11,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 71 transitions. [2023-11-26 10:49:11,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 71 transitions. [2023-11-26 10:49:11,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:11,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 71 transitions. [2023-11-26 10:49:11,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 10:49:11,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 10:49:11,759 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 10:49:11,760 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 60 flow. Second operand 3 states and 71 transitions. [2023-11-26 10:49:11,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 24 transitions, 86 flow [2023-11-26 10:49:11,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 24 transitions, 85 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:49:11,763 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 57 flow [2023-11-26 10:49:11,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-11-26 10:49:11,766 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -9 predicate places. [2023-11-26 10:49:11,766 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 57 flow [2023-11-26 10:49:11,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 10:49:11,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:11,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:11,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:49:11,771 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:11,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:11,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1475639376, now seen corresponding path program 1 times [2023-11-26 10:49:11,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:11,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725823345] [2023-11-26 10:49:11,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:11,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:12,006 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 10:49:12,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:12,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725823345] [2023-11-26 10:49:12,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725823345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:12,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:12,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:49:12,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133833309] [2023-11-26 10:49:12,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:12,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:12,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:12,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:12,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:12,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 37 [2023-11-26 10:49:12,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 10:49:12,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:12,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 37 [2023-11-26 10:49:12,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:12,118 INFO L124 PetriNetUnfolderBase]: 76/176 cut-off events. [2023-11-26 10:49:12,118 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-26 10:49:12,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 176 events. 76/176 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 609 event pairs, 27 based on Foata normal form. 5/179 useless extension candidates. Maximal degree in co-relation 322. Up to 91 conditions per place. [2023-11-26 10:49:12,122 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 20 selfloop transitions, 2 changer transitions 3/33 dead transitions. [2023-11-26 10:49:12,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 128 flow [2023-11-26 10:49:12,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:12,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:49:12,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2023-11-26 10:49:12,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7567567567567568 [2023-11-26 10:49:12,125 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 84 transitions. [2023-11-26 10:49:12,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 84 transitions. [2023-11-26 10:49:12,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:12,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 84 transitions. [2023-11-26 10:49:12,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 10:49:12,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 10:49:12,130 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 10:49:12,130 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 57 flow. Second operand 3 states and 84 transitions. [2023-11-26 10:49:12,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 128 flow [2023-11-26 10:49:12,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:49:12,135 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 70 flow [2023-11-26 10:49:12,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-11-26 10:49:12,139 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -7 predicate places. [2023-11-26 10:49:12,139 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 70 flow [2023-11-26 10:49:12,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 10:49:12,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:12,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:12,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:49:12,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:12,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:12,143 INFO L85 PathProgramCache]: Analyzing trace with hash -755346367, now seen corresponding path program 1 times [2023-11-26 10:49:12,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:12,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460233361] [2023-11-26 10:49:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:12,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:12,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:12,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460233361] [2023-11-26 10:49:12,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460233361] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:12,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:12,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:49:12,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368672374] [2023-11-26 10:49:12,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:12,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:49:12,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:12,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:49:12,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:49:12,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-26 10:49:12,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 70 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 10:49:12,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:12,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-26 10:49:12,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:12,493 INFO L124 PetriNetUnfolderBase]: 137/287 cut-off events. [2023-11-26 10:49:12,494 INFO L125 PetriNetUnfolderBase]: For 15/17 co-relation queries the response was YES. [2023-11-26 10:49:12,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 287 events. 137/287 cut-off events. For 15/17 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1193 event pairs, 60 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 583. Up to 168 conditions per place. [2023-11-26 10:49:12,497 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 29 selfloop transitions, 9 changer transitions 2/48 dead transitions. [2023-11-26 10:49:12,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 201 flow [2023-11-26 10:49:12,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:49:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:49:12,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2023-11-26 10:49:12,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7135135135135136 [2023-11-26 10:49:12,499 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 132 transitions. [2023-11-26 10:49:12,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 132 transitions. [2023-11-26 10:49:12,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:12,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 132 transitions. [2023-11-26 10:49:12,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 10:49:12,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 10:49:12,501 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 10:49:12,501 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 70 flow. Second operand 5 states and 132 transitions. [2023-11-26 10:49:12,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 48 transitions, 201 flow [2023-11-26 10:49:12,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 48 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:49:12,504 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 136 flow [2023-11-26 10:49:12,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-26 10:49:12,505 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -1 predicate places. [2023-11-26 10:49:12,505 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 136 flow [2023-11-26 10:49:12,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 10:49:12,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:12,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:12,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:49:12,506 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:12,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:12,507 INFO L85 PathProgramCache]: Analyzing trace with hash 248364379, now seen corresponding path program 2 times [2023-11-26 10:49:12,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:12,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758470146] [2023-11-26 10:49:12,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:12,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:12,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:12,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758470146] [2023-11-26 10:49:12,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758470146] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:12,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:12,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:49:12,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93108731] [2023-11-26 10:49:12,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:12,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:49:12,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:12,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:49:12,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:49:12,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-26 10:49:12,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 10:49:12,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:12,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-26 10:49:12,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:12,886 INFO L124 PetriNetUnfolderBase]: 156/307 cut-off events. [2023-11-26 10:49:12,886 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2023-11-26 10:49:12,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 307 events. 156/307 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1248 event pairs, 4 based on Foata normal form. 9/314 useless extension candidates. Maximal degree in co-relation 895. Up to 122 conditions per place. [2023-11-26 10:49:12,890 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 45 selfloop transitions, 15 changer transitions 0/68 dead transitions. [2023-11-26 10:49:12,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 68 transitions, 394 flow [2023-11-26 10:49:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:49:12,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 10:49:12,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2023-11-26 10:49:12,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7027027027027027 [2023-11-26 10:49:12,892 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 182 transitions. [2023-11-26 10:49:12,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 182 transitions. [2023-11-26 10:49:12,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:12,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 182 transitions. [2023-11-26 10:49:12,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states 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 10:49:12,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:12,898 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:12,898 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 136 flow. Second operand 7 states and 182 transitions. [2023-11-26 10:49:12,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 68 transitions, 394 flow [2023-11-26 10:49:12,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 68 transitions, 392 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-26 10:49:12,905 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 262 flow [2023-11-26 10:49:12,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=262, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-11-26 10:49:12,907 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 11 predicate places. [2023-11-26 10:49:12,908 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 262 flow [2023-11-26 10:49:12,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 10:49:12,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:12,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:12,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:49:12,909 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:12,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:12,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1663651481, now seen corresponding path program 3 times [2023-11-26 10:49:12,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:12,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225642372] [2023-11-26 10:49:12,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:12,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:13,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:13,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225642372] [2023-11-26 10:49:13,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225642372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:13,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:13,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:49:13,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717752121] [2023-11-26 10:49:13,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:13,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:49:13,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:13,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:49:13,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:49:13,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-26 10:49:13,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 10:49:13,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:13,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-26 10:49:13,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:13,216 INFO L124 PetriNetUnfolderBase]: 208/404 cut-off events. [2023-11-26 10:49:13,216 INFO L125 PetriNetUnfolderBase]: For 717/721 co-relation queries the response was YES. [2023-11-26 10:49:13,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 404 events. 208/404 cut-off events. For 717/721 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1646 event pairs, 72 based on Foata normal form. 7/406 useless extension candidates. Maximal degree in co-relation 1467. Up to 169 conditions per place. [2023-11-26 10:49:13,223 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 44 selfloop transitions, 9 changer transitions 3/64 dead transitions. [2023-11-26 10:49:13,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 64 transitions, 491 flow [2023-11-26 10:49:13,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:49:13,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:49:13,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2023-11-26 10:49:13,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6864864864864865 [2023-11-26 10:49:13,225 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 127 transitions. [2023-11-26 10:49:13,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 127 transitions. [2023-11-26 10:49:13,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:13,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 127 transitions. [2023-11-26 10:49:13,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 10:49:13,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 10:49:13,227 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 10:49:13,227 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 262 flow. Second operand 5 states and 127 transitions. [2023-11-26 10:49:13,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 64 transitions, 491 flow [2023-11-26 10:49:13,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 491 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:49:13,234 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 308 flow [2023-11-26 10:49:13,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2023-11-26 10:49:13,235 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 18 predicate places. [2023-11-26 10:49:13,235 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 308 flow [2023-11-26 10:49:13,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 10:49:13,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:13,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:13,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 10:49:13,236 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:13,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:13,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1545113523, now seen corresponding path program 4 times [2023-11-26 10:49:13,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:13,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770862686] [2023-11-26 10:49:13,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:13,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,403 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 10:49:13,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:13,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770862686] [2023-11-26 10:49:13,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770862686] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:13,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035814427] [2023-11-26 10:49:13,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:49:13,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:13,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:13,408 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:13,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:49:13,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:49:13,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:13,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:49:13,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:13,691 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 10:49:13,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:13,762 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 10:49:13,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035814427] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:13,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:13,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2023-11-26 10:49:13,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783427187] [2023-11-26 10:49:13,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:13,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:49:13,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:13,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:49:13,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:49:13,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-26 10:49:13,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 308 flow. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 10:49:13,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:13,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-26 10:49:13,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:14,114 INFO L124 PetriNetUnfolderBase]: 301/595 cut-off events. [2023-11-26 10:49:14,114 INFO L125 PetriNetUnfolderBase]: For 1475/1475 co-relation queries the response was YES. [2023-11-26 10:49:14,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2302 conditions, 595 events. 301/595 cut-off events. For 1475/1475 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2851 event pairs, 31 based on Foata normal form. 7/594 useless extension candidates. Maximal degree in co-relation 2278. Up to 181 conditions per place. [2023-11-26 10:49:14,124 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 48 selfloop transitions, 35 changer transitions 1/92 dead transitions. [2023-11-26 10:49:14,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 92 transitions, 771 flow [2023-11-26 10:49:14,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:49:14,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 10:49:14,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2023-11-26 10:49:14,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6810810810810811 [2023-11-26 10:49:14,126 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 252 transitions. [2023-11-26 10:49:14,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 252 transitions. [2023-11-26 10:49:14,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:14,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 252 transitions. [2023-11-26 10:49:14,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 25.2) internal successors, (252), 10 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:14,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 37.0) internal successors, (407), 11 states have internal predecessors, (407), 0 states have call successors, (0), 0 states 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 10:49:14,130 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 37.0) internal successors, (407), 11 states have internal predecessors, (407), 0 states have call successors, (0), 0 states 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 10:49:14,130 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 308 flow. Second operand 10 states and 252 transitions. [2023-11-26 10:49:14,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 92 transitions, 771 flow [2023-11-26 10:49:14,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 749 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-26 10:49:14,139 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 546 flow [2023-11-26 10:49:14,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=546, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2023-11-26 10:49:14,140 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 29 predicate places. [2023-11-26 10:49:14,141 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 546 flow [2023-11-26 10:49:14,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 10:49:14,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:14,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:14,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:49:14,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 10:49:14,347 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:14,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:14,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1672521275, now seen corresponding path program 5 times [2023-11-26 10:49:14,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:14,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443355541] [2023-11-26 10:49:14,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:14,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:14,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:14,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443355541] [2023-11-26 10:49:14,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443355541] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:14,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:14,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:49:14,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011125521] [2023-11-26 10:49:14,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:14,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:49:14,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:14,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:49:14,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:49:14,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-26 10:49:14,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 546 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 10:49:14,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:14,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-26 10:49:14,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:14,775 INFO L124 PetriNetUnfolderBase]: 307/604 cut-off events. [2023-11-26 10:49:14,776 INFO L125 PetriNetUnfolderBase]: For 2911/2913 co-relation queries the response was YES. [2023-11-26 10:49:14,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2799 conditions, 604 events. 307/604 cut-off events. For 2911/2913 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2860 event pairs, 97 based on Foata normal form. 2/601 useless extension candidates. Maximal degree in co-relation 2772. Up to 295 conditions per place. [2023-11-26 10:49:14,784 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 47 selfloop transitions, 20 changer transitions 1/76 dead transitions. [2023-11-26 10:49:14,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 76 transitions, 821 flow [2023-11-26 10:49:14,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:49:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:49:14,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2023-11-26 10:49:14,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6918918918918919 [2023-11-26 10:49:14,786 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 128 transitions. [2023-11-26 10:49:14,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 128 transitions. [2023-11-26 10:49:14,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:14,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 128 transitions. [2023-11-26 10:49:14,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 10:49:14,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 10:49:14,788 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 10:49:14,788 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 546 flow. Second operand 5 states and 128 transitions. [2023-11-26 10:49:14,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 76 transitions, 821 flow [2023-11-26 10:49:14,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 76 transitions, 755 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-11-26 10:49:14,802 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 585 flow [2023-11-26 10:49:14,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=585, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2023-11-26 10:49:14,803 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 32 predicate places. [2023-11-26 10:49:14,804 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 585 flow [2023-11-26 10:49:14,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 10:49:14,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:14,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:14,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 10:49:14,805 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:14,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:14,805 INFO L85 PathProgramCache]: Analyzing trace with hash -103592733, now seen corresponding path program 6 times [2023-11-26 10:49:14,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:14,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699898264] [2023-11-26 10:49:14,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:14,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:14,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:14,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699898264] [2023-11-26 10:49:14,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699898264] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:14,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:14,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:49:14,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057444202] [2023-11-26 10:49:14,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:14,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:49:14,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:14,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:49:14,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:49:14,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-26 10:49:14,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 585 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 10:49:14,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:14,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-26 10:49:14,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:15,168 INFO L124 PetriNetUnfolderBase]: 302/592 cut-off events. [2023-11-26 10:49:15,168 INFO L125 PetriNetUnfolderBase]: For 3194/3196 co-relation queries the response was YES. [2023-11-26 10:49:15,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2792 conditions, 592 events. 302/592 cut-off events. For 3194/3196 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2773 event pairs, 93 based on Foata normal form. 7/594 useless extension candidates. Maximal degree in co-relation 2762. Up to 275 conditions per place. [2023-11-26 10:49:15,177 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 45 selfloop transitions, 26 changer transitions 0/79 dead transitions. [2023-11-26 10:49:15,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 830 flow [2023-11-26 10:49:15,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:49:15,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:49:15,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2023-11-26 10:49:15,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6801801801801802 [2023-11-26 10:49:15,179 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 151 transitions. [2023-11-26 10:49:15,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 151 transitions. [2023-11-26 10:49:15,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:15,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 151 transitions. [2023-11-26 10:49:15,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 10:49:15,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 10:49:15,181 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 10:49:15,182 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 585 flow. Second operand 6 states and 151 transitions. [2023-11-26 10:49:15,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 830 flow [2023-11-26 10:49:15,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 79 transitions, 780 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-11-26 10:49:15,195 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 613 flow [2023-11-26 10:49:15,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=613, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2023-11-26 10:49:15,196 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 33 predicate places. [2023-11-26 10:49:15,196 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 613 flow [2023-11-26 10:49:15,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 10:49:15,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:15,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:15,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 10:49:15,197 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:15,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:15,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1656212771, now seen corresponding path program 1 times [2023-11-26 10:49:15,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:15,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807360851] [2023-11-26 10:49:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:15,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:15,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:15,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807360851] [2023-11-26 10:49:15,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807360851] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:15,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254456064] [2023-11-26 10:49:15,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:15,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:15,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:15,358 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:15,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:49:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:15,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:49:15,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:49:15,518 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:15,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254456064] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:15,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:49:15,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-11-26 10:49:15,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138095267] [2023-11-26 10:49:15,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:15,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:49:15,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:15,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:49:15,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:49:15,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 37 [2023-11-26 10:49:15,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 613 flow. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 10:49:15,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:15,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 37 [2023-11-26 10:49:15,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:15,773 INFO L124 PetriNetUnfolderBase]: 476/1008 cut-off events. [2023-11-26 10:49:15,774 INFO L125 PetriNetUnfolderBase]: For 5216/5281 co-relation queries the response was YES. [2023-11-26 10:49:15,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4590 conditions, 1008 events. 476/1008 cut-off events. For 5216/5281 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5698 event pairs, 90 based on Foata normal form. 18/1019 useless extension candidates. Maximal degree in co-relation 4561. Up to 357 conditions per place. [2023-11-26 10:49:15,787 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 71 selfloop transitions, 5 changer transitions 7/105 dead transitions. [2023-11-26 10:49:15,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 105 transitions, 1133 flow [2023-11-26 10:49:15,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:49:15,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:49:15,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2023-11-26 10:49:15,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7972972972972973 [2023-11-26 10:49:15,789 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 118 transitions. [2023-11-26 10:49:15,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 118 transitions. [2023-11-26 10:49:15,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:15,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 118 transitions. [2023-11-26 10:49:15,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 10:49:15,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 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 10:49:15,791 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 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 10:49:15,791 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 613 flow. Second operand 4 states and 118 transitions. [2023-11-26 10:49:15,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 105 transitions, 1133 flow [2023-11-26 10:49:15,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 105 transitions, 1072 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-26 10:49:15,811 INFO L231 Difference]: Finished difference. Result has 74 places, 66 transitions, 609 flow [2023-11-26 10:49:15,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=609, PETRI_PLACES=74, PETRI_TRANSITIONS=66} [2023-11-26 10:49:15,813 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 35 predicate places. [2023-11-26 10:49:15,814 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 66 transitions, 609 flow [2023-11-26 10:49:15,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 10:49:15,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:15,814 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:15,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:16,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:16,021 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:16,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:16,021 INFO L85 PathProgramCache]: Analyzing trace with hash 17991866, now seen corresponding path program 2 times [2023-11-26 10:49:16,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:16,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351110622] [2023-11-26 10:49:16,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:16,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:16,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:16,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351110622] [2023-11-26 10:49:16,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351110622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:16,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278518527] [2023-11-26 10:49:16,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:49:16,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:16,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:16,286 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:16,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:49:16,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:49:16,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:16,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:49:16,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:16,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:16,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278518527] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:16,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:16,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-26 10:49:16,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364609918] [2023-11-26 10:49:16,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:16,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:49:16,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:16,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:49:16,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:49:16,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-26 10:49:16,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 66 transitions, 609 flow. Second operand has 12 states, 12 states have (on average 20.75) internal successors, (249), 12 states have internal predecessors, (249), 0 states have call successors, (0), 0 states 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 10:49:16,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:16,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-26 10:49:16,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:17,641 INFO L124 PetriNetUnfolderBase]: 920/1689 cut-off events. [2023-11-26 10:49:17,641 INFO L125 PetriNetUnfolderBase]: For 8771/8805 co-relation queries the response was YES. [2023-11-26 10:49:17,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8532 conditions, 1689 events. 920/1689 cut-off events. For 8771/8805 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9360 event pairs, 23 based on Foata normal form. 30/1707 useless extension candidates. Maximal degree in co-relation 8500. Up to 558 conditions per place. [2023-11-26 10:49:17,664 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 102 selfloop transitions, 104 changer transitions 21/237 dead transitions. [2023-11-26 10:49:17,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 237 transitions, 2573 flow [2023-11-26 10:49:17,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-26 10:49:17,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-26 10:49:17,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 558 transitions. [2023-11-26 10:49:17,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6556991774383079 [2023-11-26 10:49:17,668 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 558 transitions. [2023-11-26 10:49:17,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 558 transitions. [2023-11-26 10:49:17,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:17,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 558 transitions. [2023-11-26 10:49:17,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 24.26086956521739) internal successors, (558), 23 states have internal predecessors, (558), 0 states have call successors, (0), 0 states 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 10:49:17,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 37.0) internal successors, (888), 24 states have internal predecessors, (888), 0 states have call successors, (0), 0 states 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 10:49:17,676 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 37.0) internal successors, (888), 24 states have internal predecessors, (888), 0 states have call successors, (0), 0 states 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 10:49:17,676 INFO L175 Difference]: Start difference. First operand has 74 places, 66 transitions, 609 flow. Second operand 23 states and 558 transitions. [2023-11-26 10:49:17,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 237 transitions, 2573 flow [2023-11-26 10:49:17,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 237 transitions, 2549 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-11-26 10:49:17,698 INFO L231 Difference]: Finished difference. Result has 107 places, 146 transitions, 1861 flow [2023-11-26 10:49:17,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1861, PETRI_PLACES=107, PETRI_TRANSITIONS=146} [2023-11-26 10:49:17,699 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 68 predicate places. [2023-11-26 10:49:17,699 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 146 transitions, 1861 flow [2023-11-26 10:49:17,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.75) internal successors, (249), 12 states have internal predecessors, (249), 0 states have call successors, (0), 0 states 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 10:49:17,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:17,700 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:17,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:17,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:17,912 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:17,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:17,912 INFO L85 PathProgramCache]: Analyzing trace with hash -226318560, now seen corresponding path program 3 times [2023-11-26 10:49:17,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:17,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676736273] [2023-11-26 10:49:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:17,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:18,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:18,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676736273] [2023-11-26 10:49:18,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676736273] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:18,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875125717] [2023-11-26 10:49:18,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:49:18,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:18,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:18,126 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:18,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:49:18,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-26 10:49:18,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:18,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:49:18,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:18,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:18,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875125717] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:18,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:18,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-26 10:49:18,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291589238] [2023-11-26 10:49:18,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:18,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 10:49:18,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:18,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 10:49:18,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:49:18,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-26 10:49:18,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 146 transitions, 1861 flow. Second operand has 15 states, 15 states have (on average 20.4) internal successors, (306), 15 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:18,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:18,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-26 10:49:18,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:19,399 INFO L124 PetriNetUnfolderBase]: 994/1853 cut-off events. [2023-11-26 10:49:19,399 INFO L125 PetriNetUnfolderBase]: For 16190/16212 co-relation queries the response was YES. [2023-11-26 10:49:19,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10942 conditions, 1853 events. 994/1853 cut-off events. For 16190/16212 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10640 event pairs, 107 based on Foata normal form. 18/1863 useless extension candidates. Maximal degree in co-relation 10899. Up to 733 conditions per place. [2023-11-26 10:49:19,430 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 129 selfloop transitions, 102 changer transitions 5/246 dead transitions. [2023-11-26 10:49:19,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 246 transitions, 3497 flow [2023-11-26 10:49:19,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 10:49:19,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-26 10:49:19,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 360 transitions. [2023-11-26 10:49:19,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2023-11-26 10:49:19,433 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 360 transitions. [2023-11-26 10:49:19,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 360 transitions. [2023-11-26 10:49:19,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:19,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 360 transitions. [2023-11-26 10:49:19,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 10:49:19,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 37.0) internal successors, (592), 16 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:19,438 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 37.0) internal successors, (592), 16 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:19,438 INFO L175 Difference]: Start difference. First operand has 107 places, 146 transitions, 1861 flow. Second operand 15 states and 360 transitions. [2023-11-26 10:49:19,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 246 transitions, 3497 flow [2023-11-26 10:49:19,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 246 transitions, 2907 flow, removed 285 selfloop flow, removed 3 redundant places. [2023-11-26 10:49:19,517 INFO L231 Difference]: Finished difference. Result has 124 places, 186 transitions, 2256 flow [2023-11-26 10:49:19,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2256, PETRI_PLACES=124, PETRI_TRANSITIONS=186} [2023-11-26 10:49:19,518 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 85 predicate places. [2023-11-26 10:49:19,518 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 186 transitions, 2256 flow [2023-11-26 10:49:19,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.4) internal successors, (306), 15 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:19,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:19,519 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:19,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:19,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 10:49:19,725 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:19,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:19,726 INFO L85 PathProgramCache]: Analyzing trace with hash -705273246, now seen corresponding path program 4 times [2023-11-26 10:49:19,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:19,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460357924] [2023-11-26 10:49:19,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:19,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:19,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:19,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460357924] [2023-11-26 10:49:19,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460357924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:19,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913542370] [2023-11-26 10:49:19,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:49:19,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:19,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:19,985 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:19,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:49:20,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:49:20,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:20,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:49:20,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:20,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:20,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913542370] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:20,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:20,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-26 10:49:20,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091794724] [2023-11-26 10:49:20,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:20,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:49:20,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:20,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:49:20,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:49:20,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-26 10:49:20,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 186 transitions, 2256 flow. Second operand has 14 states, 14 states have (on average 21.071428571428573) internal successors, (295), 14 states have internal predecessors, (295), 0 states have call successors, (0), 0 states 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 10:49:20,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:20,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-26 10:49:20,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:21,958 INFO L124 PetriNetUnfolderBase]: 1447/2658 cut-off events. [2023-11-26 10:49:21,959 INFO L125 PetriNetUnfolderBase]: For 18326/18356 co-relation queries the response was YES. [2023-11-26 10:49:21,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13287 conditions, 2658 events. 1447/2658 cut-off events. For 18326/18356 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15918 event pairs, 43 based on Foata normal form. 81/2725 useless extension candidates. Maximal degree in co-relation 13239. Up to 583 conditions per place. [2023-11-26 10:49:22,004 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 145 selfloop transitions, 240 changer transitions 3/398 dead transitions. [2023-11-26 10:49:22,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 398 transitions, 4911 flow [2023-11-26 10:49:22,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-26 10:49:22,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-26 10:49:22,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 796 transitions. [2023-11-26 10:49:22,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6519246519246519 [2023-11-26 10:49:22,011 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 796 transitions. [2023-11-26 10:49:22,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 796 transitions. [2023-11-26 10:49:22,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:22,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 796 transitions. [2023-11-26 10:49:22,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 24.12121212121212) internal successors, (796), 33 states have internal predecessors, (796), 0 states have call successors, (0), 0 states 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 10:49:22,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 37.0) internal successors, (1258), 34 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states 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 10:49:22,026 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 37.0) internal successors, (1258), 34 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states 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 10:49:22,027 INFO L175 Difference]: Start difference. First operand has 124 places, 186 transitions, 2256 flow. Second operand 33 states and 796 transitions. [2023-11-26 10:49:22,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 398 transitions, 4911 flow [2023-11-26 10:49:22,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 398 transitions, 4828 flow, removed 31 selfloop flow, removed 3 redundant places. [2023-11-26 10:49:22,137 INFO L231 Difference]: Finished difference. Result has 169 places, 292 transitions, 4067 flow [2023-11-26 10:49:22,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2181, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4067, PETRI_PLACES=169, PETRI_TRANSITIONS=292} [2023-11-26 10:49:22,139 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 130 predicate places. [2023-11-26 10:49:22,139 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 292 transitions, 4067 flow [2023-11-26 10:49:22,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.071428571428573) internal successors, (295), 14 states have internal predecessors, (295), 0 states have call successors, (0), 0 states 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 10:49:22,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:22,140 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:22,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:22,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 10:49:22,347 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:22,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:22,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1327097142, now seen corresponding path program 5 times [2023-11-26 10:49:22,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:22,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201779278] [2023-11-26 10:49:22,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:22,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:22,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:22,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201779278] [2023-11-26 10:49:22,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201779278] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:22,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545040100] [2023-11-26 10:49:22,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:49:22,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:22,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:22,549 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:22,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:49:22,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:49:22,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:22,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:49:22,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:22,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:22,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545040100] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:22,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:22,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-26 10:49:22,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29688727] [2023-11-26 10:49:22,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:22,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 10:49:22,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:22,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 10:49:22,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-11-26 10:49:22,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-26 10:49:22,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 292 transitions, 4067 flow. Second operand has 17 states, 17 states have (on average 20.176470588235293) internal successors, (343), 17 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 10:49:22,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:22,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-26 10:49:22,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:25,808 INFO L124 PetriNetUnfolderBase]: 2025/3812 cut-off events. [2023-11-26 10:49:25,809 INFO L125 PetriNetUnfolderBase]: For 52381/52412 co-relation queries the response was YES. [2023-11-26 10:49:25,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21742 conditions, 3812 events. 2025/3812 cut-off events. For 52381/52412 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 25129 event pairs, 70 based on Foata normal form. 91/3883 useless extension candidates. Maximal degree in co-relation 21678. Up to 865 conditions per place. [2023-11-26 10:49:25,886 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 167 selfloop transitions, 368 changer transitions 7/552 dead transitions. [2023-11-26 10:49:25,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 552 transitions, 7998 flow [2023-11-26 10:49:25,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-26 10:49:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-26 10:49:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 859 transitions. [2023-11-26 10:49:25,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6274653031409788 [2023-11-26 10:49:25,892 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 859 transitions. [2023-11-26 10:49:25,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 859 transitions. [2023-11-26 10:49:25,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:25,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 859 transitions. [2023-11-26 10:49:25,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 23.216216216216218) internal successors, (859), 37 states have internal predecessors, (859), 0 states have call successors, (0), 0 states 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 10:49:25,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 37.0) internal successors, (1406), 38 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states 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 10:49:25,964 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 37.0) internal successors, (1406), 38 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states 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 10:49:25,965 INFO L175 Difference]: Start difference. First operand has 169 places, 292 transitions, 4067 flow. Second operand 37 states and 859 transitions. [2023-11-26 10:49:25,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 552 transitions, 7998 flow [2023-11-26 10:49:26,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 552 transitions, 7672 flow, removed 138 selfloop flow, removed 3 redundant places. [2023-11-26 10:49:26,280 INFO L231 Difference]: Finished difference. Result has 217 places, 426 transitions, 6744 flow [2023-11-26 10:49:26,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3836, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=6744, PETRI_PLACES=217, PETRI_TRANSITIONS=426} [2023-11-26 10:49:26,281 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 178 predicate places. [2023-11-26 10:49:26,282 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 426 transitions, 6744 flow [2023-11-26 10:49:26,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 20.176470588235293) internal successors, (343), 17 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 10:49:26,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:26,282 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:26,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-26 10:49:26,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:26,489 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:26,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:26,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1842752714, now seen corresponding path program 6 times [2023-11-26 10:49:26,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:26,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651132497] [2023-11-26 10:49:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:26,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:26,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:26,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651132497] [2023-11-26 10:49:26,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651132497] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:26,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968749147] [2023-11-26 10:49:26,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 10:49:26,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:26,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:26,693 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:26,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:49:26,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-26 10:49:26,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:26,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:49:26,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:26,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:27,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968749147] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:27,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:27,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-26 10:49:27,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164740586] [2023-11-26 10:49:27,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:27,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 10:49:27,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:27,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 10:49:27,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:49:27,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-26 10:49:27,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 426 transitions, 6744 flow. Second operand has 16 states, 16 states have (on average 20.5625) internal successors, (329), 16 states have internal predecessors, (329), 0 states have call successors, (0), 0 states 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 10:49:27,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:27,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-26 10:49:27,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:29,604 INFO L124 PetriNetUnfolderBase]: 2639/4983 cut-off events. [2023-11-26 10:49:29,604 INFO L125 PetriNetUnfolderBase]: For 93337/93377 co-relation queries the response was YES. [2023-11-26 10:49:29,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32209 conditions, 4983 events. 2639/4983 cut-off events. For 93337/93377 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 34578 event pairs, 171 based on Foata normal form. 66/5019 useless extension candidates. Maximal degree in co-relation 32131. Up to 1030 conditions per place. [2023-11-26 10:49:29,666 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 170 selfloop transitions, 471 changer transitions 9/660 dead transitions. [2023-11-26 10:49:29,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 660 transitions, 11350 flow [2023-11-26 10:49:29,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-26 10:49:29,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-26 10:49:29,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 670 transitions. [2023-11-26 10:49:29,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6467181467181468 [2023-11-26 10:49:29,670 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 670 transitions. [2023-11-26 10:49:29,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 670 transitions. [2023-11-26 10:49:29,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:29,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 670 transitions. [2023-11-26 10:49:29,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 23.928571428571427) internal successors, (670), 28 states have internal predecessors, (670), 0 states have call successors, (0), 0 states 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 10:49:29,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 37.0) internal successors, (1073), 29 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states 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 10:49:29,676 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 37.0) internal successors, (1073), 29 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states 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 10:49:29,676 INFO L175 Difference]: Start difference. First operand has 217 places, 426 transitions, 6744 flow. Second operand 28 states and 670 transitions. [2023-11-26 10:49:29,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 660 transitions, 11350 flow [2023-11-26 10:49:30,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 660 transitions, 10563 flow, removed 178 selfloop flow, removed 10 redundant places. [2023-11-26 10:49:30,495 INFO L231 Difference]: Finished difference. Result has 247 places, 579 transitions, 10424 flow [2023-11-26 10:49:30,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=6092, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=10424, PETRI_PLACES=247, PETRI_TRANSITIONS=579} [2023-11-26 10:49:30,497 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 208 predicate places. [2023-11-26 10:49:30,497 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 579 transitions, 10424 flow [2023-11-26 10:49:30,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.5625) internal successors, (329), 16 states have internal predecessors, (329), 0 states have call successors, (0), 0 states 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 10:49:30,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:30,498 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:30,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-26 10:49:30,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 10:49:30,704 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:30,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:30,705 INFO L85 PathProgramCache]: Analyzing trace with hash -865346588, now seen corresponding path program 7 times [2023-11-26 10:49:30,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:30,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001520123] [2023-11-26 10:49:30,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:30,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:30,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:30,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001520123] [2023-11-26 10:49:30,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001520123] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:30,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956543198] [2023-11-26 10:49:30,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 10:49:30,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:30,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:30,927 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:30,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:49:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:31,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:49:31,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:31,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:31,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956543198] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:31,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:31,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-26 10:49:31,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741651533] [2023-11-26 10:49:31,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:31,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:49:31,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:31,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:49:31,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:49:31,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-26 10:49:31,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 579 transitions, 10424 flow. Second operand has 14 states, 14 states have (on average 20.571428571428573) internal successors, (288), 14 states have internal predecessors, (288), 0 states have call successors, (0), 0 states 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 10:49:31,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:31,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-26 10:49:31,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:34,212 INFO L124 PetriNetUnfolderBase]: 3051/5679 cut-off events. [2023-11-26 10:49:34,213 INFO L125 PetriNetUnfolderBase]: For 147343/147376 co-relation queries the response was YES. [2023-11-26 10:49:34,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42011 conditions, 5679 events. 3051/5679 cut-off events. For 147343/147376 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 39379 event pairs, 202 based on Foata normal form. 48/5693 useless extension candidates. Maximal degree in co-relation 41926. Up to 1246 conditions per place. [2023-11-26 10:49:34,298 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 301 selfloop transitions, 431 changer transitions 4/746 dead transitions. [2023-11-26 10:49:34,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 746 transitions, 15072 flow [2023-11-26 10:49:34,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-26 10:49:34,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-26 10:49:34,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 572 transitions. [2023-11-26 10:49:34,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6721504112808461 [2023-11-26 10:49:34,302 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 572 transitions. [2023-11-26 10:49:34,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 572 transitions. [2023-11-26 10:49:34,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:34,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 572 transitions. [2023-11-26 10:49:34,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 24.869565217391305) internal successors, (572), 23 states have internal predecessors, (572), 0 states have call successors, (0), 0 states 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 10:49:34,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 37.0) internal successors, (888), 24 states have internal predecessors, (888), 0 states have call successors, (0), 0 states 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 10:49:34,307 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 37.0) internal successors, (888), 24 states have internal predecessors, (888), 0 states have call successors, (0), 0 states 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 10:49:34,307 INFO L175 Difference]: Start difference. First operand has 247 places, 579 transitions, 10424 flow. Second operand 23 states and 572 transitions. [2023-11-26 10:49:34,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 746 transitions, 15072 flow [2023-11-26 10:49:35,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 746 transitions, 14140 flow, removed 366 selfloop flow, removed 12 redundant places. [2023-11-26 10:49:35,916 INFO L231 Difference]: Finished difference. Result has 259 places, 652 transitions, 12999 flow [2023-11-26 10:49:35,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=9705, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12999, PETRI_PLACES=259, PETRI_TRANSITIONS=652} [2023-11-26 10:49:35,917 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 220 predicate places. [2023-11-26 10:49:35,917 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 652 transitions, 12999 flow [2023-11-26 10:49:35,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.571428571428573) internal successors, (288), 14 states have internal predecessors, (288), 0 states have call successors, (0), 0 states 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 10:49:35,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:35,918 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:35,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:36,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 10:49:36,118 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:36,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:36,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1265350914, now seen corresponding path program 8 times [2023-11-26 10:49:36,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:36,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340268916] [2023-11-26 10:49:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:36,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:36,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:36,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340268916] [2023-11-26 10:49:36,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340268916] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:36,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146831594] [2023-11-26 10:49:36,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:49:36,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:36,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:36,317 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:36,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:49:36,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:49:36,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:36,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:49:36,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:36,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:36,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146831594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:36,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:36,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-26 10:49:36,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309124364] [2023-11-26 10:49:36,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:36,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 10:49:36,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:36,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 10:49:36,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:49:36,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-26 10:49:36,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 652 transitions, 12999 flow. Second operand has 15 states, 15 states have (on average 20.466666666666665) internal successors, (307), 15 states have internal predecessors, (307), 0 states have call successors, (0), 0 states 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 10:49:36,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:36,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-26 10:49:36,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:39,192 INFO L124 PetriNetUnfolderBase]: 3054/5639 cut-off events. [2023-11-26 10:49:39,192 INFO L125 PetriNetUnfolderBase]: For 128645/128679 co-relation queries the response was YES. [2023-11-26 10:49:39,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42972 conditions, 5639 events. 3054/5639 cut-off events. For 128645/128679 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 38995 event pairs, 489 based on Foata normal form. 38/5629 useless extension candidates. Maximal degree in co-relation 42886. Up to 2188 conditions per place. [2023-11-26 10:49:39,377 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 316 selfloop transitions, 364 changer transitions 3/693 dead transitions. [2023-11-26 10:49:39,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 693 transitions, 14765 flow [2023-11-26 10:49:39,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 10:49:39,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-26 10:49:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 343 transitions. [2023-11-26 10:49:39,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6621621621621622 [2023-11-26 10:49:39,379 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 343 transitions. [2023-11-26 10:49:39,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 343 transitions. [2023-11-26 10:49:39,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:39,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 343 transitions. [2023-11-26 10:49:39,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 24.5) internal successors, (343), 14 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 10:49:39,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 37.0) internal successors, (555), 15 states have internal predecessors, (555), 0 states have call successors, (0), 0 states 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 10:49:39,383 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 37.0) internal successors, (555), 15 states have internal predecessors, (555), 0 states have call successors, (0), 0 states 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 10:49:39,383 INFO L175 Difference]: Start difference. First operand has 259 places, 652 transitions, 12999 flow. Second operand 14 states and 343 transitions. [2023-11-26 10:49:39,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 693 transitions, 14765 flow [2023-11-26 10:49:41,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 693 transitions, 13935 flow, removed 401 selfloop flow, removed 3 redundant places. [2023-11-26 10:49:41,127 INFO L231 Difference]: Finished difference. Result has 268 places, 651 transitions, 12981 flow [2023-11-26 10:49:41,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=12215, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12981, PETRI_PLACES=268, PETRI_TRANSITIONS=651} [2023-11-26 10:49:41,128 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 229 predicate places. [2023-11-26 10:49:41,129 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 651 transitions, 12981 flow [2023-11-26 10:49:41,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.466666666666665) internal successors, (307), 15 states have internal predecessors, (307), 0 states have call successors, (0), 0 states 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 10:49:41,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:41,129 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:41,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:41,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:41,330 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:41,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:41,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1927694978, now seen corresponding path program 9 times [2023-11-26 10:49:41,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:41,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789562651] [2023-11-26 10:49:41,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:41,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:41,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:41,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789562651] [2023-11-26 10:49:41,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789562651] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:41,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487377378] [2023-11-26 10:49:41,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:49:41,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:41,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:41,543 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:41,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:49:41,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 10:49:41,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:41,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:49:41,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:41,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:41,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487377378] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:41,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:41,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-26 10:49:41,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440930109] [2023-11-26 10:49:41,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:41,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 10:49:41,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:41,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 10:49:41,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:49:41,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-26 10:49:41,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 651 transitions, 12981 flow. Second operand has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 10:49:41,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:41,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-26 10:49:41,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:45,731 INFO L124 PetriNetUnfolderBase]: 4164/7786 cut-off events. [2023-11-26 10:49:45,732 INFO L125 PetriNetUnfolderBase]: For 122579/122622 co-relation queries the response was YES. [2023-11-26 10:49:45,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58415 conditions, 7786 events. 4164/7786 cut-off events. For 122579/122622 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 57131 event pairs, 323 based on Foata normal form. 122/7826 useless extension candidates. Maximal degree in co-relation 58328. Up to 1452 conditions per place. [2023-11-26 10:49:45,869 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 344 selfloop transitions, 731 changer transitions 1/1086 dead transitions. [2023-11-26 10:49:45,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1086 transitions, 22693 flow [2023-11-26 10:49:45,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-26 10:49:45,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-26 10:49:45,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 1024 transitions. [2023-11-26 10:49:45,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6436203645505971 [2023-11-26 10:49:45,874 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 1024 transitions. [2023-11-26 10:49:45,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 1024 transitions. [2023-11-26 10:49:45,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:45,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 1024 transitions. [2023-11-26 10:49:45,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 23.813953488372093) internal successors, (1024), 43 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 10:49:45,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 37.0) internal successors, (1628), 44 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states 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 10:49:45,883 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 37.0) internal successors, (1628), 44 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states 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 10:49:45,883 INFO L175 Difference]: Start difference. First operand has 268 places, 651 transitions, 12981 flow. Second operand 43 states and 1024 transitions. [2023-11-26 10:49:45,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1086 transitions, 22693 flow [2023-11-26 10:49:48,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 1086 transitions, 21909 flow, removed 3 selfloop flow, removed 11 redundant places. [2023-11-26 10:49:48,161 INFO L231 Difference]: Finished difference. Result has 315 places, 928 transitions, 21018 flow [2023-11-26 10:49:48,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=12420, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=466, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=21018, PETRI_PLACES=315, PETRI_TRANSITIONS=928} [2023-11-26 10:49:48,163 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 276 predicate places. [2023-11-26 10:49:48,163 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 928 transitions, 21018 flow [2023-11-26 10:49:48,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 10:49:48,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:48,164 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:48,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:48,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:48,370 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:48,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:48,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1146733300, now seen corresponding path program 10 times [2023-11-26 10:49:48,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:48,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976210873] [2023-11-26 10:49:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:48,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:48,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:48,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976210873] [2023-11-26 10:49:48,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976210873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:48,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922969840] [2023-11-26 10:49:48,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:49:48,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:48,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:48,587 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:48,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:49:48,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:49:48,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:48,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:49:48,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:48,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:48,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922969840] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:48,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:48,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-26 10:49:48,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026690872] [2023-11-26 10:49:48,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:48,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 10:49:48,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:48,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 10:49:48,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:49:48,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-26 10:49:48,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 928 transitions, 21018 flow. Second operand has 13 states, 13 states have (on average 20.384615384615383) internal successors, (265), 13 states have internal predecessors, (265), 0 states have call successors, (0), 0 states 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 10:49:48,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:48,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-26 10:49:48,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:52,548 INFO L124 PetriNetUnfolderBase]: 4258/7927 cut-off events. [2023-11-26 10:49:52,548 INFO L125 PetriNetUnfolderBase]: For 154459/154495 co-relation queries the response was YES. [2023-11-26 10:49:52,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65001 conditions, 7927 events. 4258/7927 cut-off events. For 154459/154495 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 57985 event pairs, 1449 based on Foata normal form. 46/7902 useless extension candidates. Maximal degree in co-relation 64897. Up to 5638 conditions per place. [2023-11-26 10:49:52,646 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 815 selfloop transitions, 175 changer transitions 4/1004 dead transitions. [2023-11-26 10:49:52,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 1004 transitions, 24303 flow [2023-11-26 10:49:52,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:49:52,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 10:49:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 282 transitions. [2023-11-26 10:49:52,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6351351351351351 [2023-11-26 10:49:52,648 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 282 transitions. [2023-11-26 10:49:52,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 282 transitions. [2023-11-26 10:49:52,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:52,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 282 transitions. [2023-11-26 10:49:52,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 23.5) internal successors, (282), 12 states have internal predecessors, (282), 0 states have call successors, (0), 0 states 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 10:49:52,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 37.0) internal successors, (481), 13 states have internal predecessors, (481), 0 states have call successors, (0), 0 states 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 10:49:52,652 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 37.0) internal successors, (481), 13 states have internal predecessors, (481), 0 states have call successors, (0), 0 states 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 10:49:52,652 INFO L175 Difference]: Start difference. First operand has 315 places, 928 transitions, 21018 flow. Second operand 12 states and 282 transitions. [2023-11-26 10:49:52,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 1004 transitions, 24303 flow [2023-11-26 10:49:55,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 1004 transitions, 23944 flow, removed 54 selfloop flow, removed 10 redundant places. [2023-11-26 10:49:55,553 INFO L231 Difference]: Finished difference. Result has 322 places, 954 transitions, 21881 flow [2023-11-26 10:49:55,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=20667, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=928, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=763, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21881, PETRI_PLACES=322, PETRI_TRANSITIONS=954} [2023-11-26 10:49:55,554 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 283 predicate places. [2023-11-26 10:49:55,569 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 954 transitions, 21881 flow [2023-11-26 10:49:55,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.384615384615383) internal successors, (265), 13 states have internal predecessors, (265), 0 states have call successors, (0), 0 states 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 10:49:55,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:55,569 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:55,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:55,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:55,776 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:49:55,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:55,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1199847798, now seen corresponding path program 11 times [2023-11-26 10:49:55,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:55,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025758081] [2023-11-26 10:49:55,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:55,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:55,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:55,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025758081] [2023-11-26 10:49:55,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025758081] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:55,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765077691] [2023-11-26 10:49:55,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:49:55,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:55,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:55,993 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:56,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9994fe1-91f0-4a70-93be-bf31a79ea74a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:49:56,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-26 10:49:56,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:56,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:49:56,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:56,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:56,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765077691] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:56,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:56,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2023-11-26 10:49:56,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502939656] [2023-11-26 10:49:56,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:56,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 10:49:56,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:56,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 10:49:56,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:49:56,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-26 10:49:56,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 954 transitions, 21881 flow. Second operand has 15 states, 15 states have (on average 20.266666666666666) internal successors, (304), 15 states have internal predecessors, (304), 0 states have call successors, (0), 0 states 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 10:49:56,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:56,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-26 10:49:56,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand