./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/triangular-longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/triangular-longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 81809963fcaff21fd6241cde97e522447f695a8b323a0a16c5a31b7f82b0f683 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:58:57,120 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:58:57,189 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:58:57,193 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:58:57,194 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:58:57,219 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:58:57,220 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:58:57,220 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:58:57,221 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:58:57,222 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:58:57,223 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:58:57,223 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:58:57,224 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:58:57,225 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:58:57,225 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:58:57,226 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:58:57,226 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:58:57,227 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:58:57,227 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:58:57,228 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:58:57,232 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:58:57,233 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:58:57,233 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:58:57,234 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:58:57,234 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:58:57,234 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:58:57,235 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:58:57,235 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:58:57,236 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:58:57,236 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:58:57,236 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:58:57,237 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:58:57,237 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:58:57,237 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:58:57,238 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:58:57,238 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:58:57,239 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:58:57,239 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:58:57,239 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_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81809963fcaff21fd6241cde97e522447f695a8b323a0a16c5a31b7f82b0f683 [2023-11-06 22:58:57,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:58:57,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:58:57,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:58:57,565 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:58:57,566 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:58:57,567 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread/triangular-longest-1.i [2023-11-06 22:59:00,602 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:59:00,886 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:59:00,891 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/sv-benchmarks/c/pthread/triangular-longest-1.i [2023-11-06 22:59:00,915 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/data/74e2ab796/53cc2aa741f84a479072aa8000cd7cac/FLAGbd5790a23 [2023-11-06 22:59:00,936 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/data/74e2ab796/53cc2aa741f84a479072aa8000cd7cac [2023-11-06 22:59:00,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:59:00,946 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:59:00,951 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:59:00,952 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:59:00,957 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:59:00,957 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:59:00" (1/1) ... [2023-11-06 22:59:00,959 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ea0a050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:00, skipping insertion in model container [2023-11-06 22:59:00,959 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:59:00" (1/1) ... [2023-11-06 22:59:01,030 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:59:01,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:59:01,568 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:59:01,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:59:01,684 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:59:01,684 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:59:01,693 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:59:01,693 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:01 WrapperNode [2023-11-06 22:59:01,693 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:59:01,695 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:59:01,695 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:59:01,695 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:59:01,705 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:01" (1/1) ... [2023-11-06 22:59:01,726 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:01" (1/1) ... [2023-11-06 22:59:01,747 INFO L138 Inliner]: procedures = 169, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2023-11-06 22:59:01,748 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:59:01,749 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:59:01,749 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:59:01,749 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:59:01,760 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:01" (1/1) ... [2023-11-06 22:59:01,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:01" (1/1) ... [2023-11-06 22:59:01,763 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:01" (1/1) ... [2023-11-06 22:59:01,764 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:01" (1/1) ... [2023-11-06 22:59:01,771 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:01" (1/1) ... [2023-11-06 22:59:01,775 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:01" (1/1) ... [2023-11-06 22:59:01,777 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:01" (1/1) ... [2023-11-06 22:59:01,778 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:01" (1/1) ... [2023-11-06 22:59:01,782 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:59:01,783 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:59:01,783 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:59:01,783 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:59:01,784 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:01" (1/1) ... [2023-11-06 22:59:01,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:59:01,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:01,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:59:01,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:59:01,846 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-06 22:59:01,846 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-06 22:59:01,846 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-06 22:59:01,846 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-06 22:59:01,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:59:01,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:59:01,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:59:01,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:59:01,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:59:01,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:59:01,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:59:01,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:59:01,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:59:01,849 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:59:01,978 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:59:01,981 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:59:02,245 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:59:02,252 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:59:02,252 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:59:02,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:59:02 BoogieIcfgContainer [2023-11-06 22:59:02,257 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:59:02,260 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:59:02,261 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:59:02,265 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:59:02,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:59:00" (1/3) ... [2023-11-06 22:59:02,267 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddaabce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:59:02, skipping insertion in model container [2023-11-06 22:59:02,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:01" (2/3) ... [2023-11-06 22:59:02,268 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddaabce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:59:02, skipping insertion in model container [2023-11-06 22:59:02,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:59:02" (3/3) ... [2023-11-06 22:59:02,269 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2023-11-06 22:59:02,290 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:59:02,290 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-06 22:59:02,290 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:59:02,347 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:59:02,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 172 flow [2023-11-06 22:59:02,436 INFO L124 PetriNetUnfolderBase]: 6/80 cut-off events. [2023-11-06 22:59:02,437 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:59:02,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 80 events. 6/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 104 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2023-11-06 22:59:02,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 172 flow [2023-11-06 22:59:02,448 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 80 transitions, 166 flow [2023-11-06 22:59:02,452 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:59:02,463 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 80 transitions, 166 flow [2023-11-06 22:59:02,466 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 80 transitions, 166 flow [2023-11-06 22:59:02,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 80 transitions, 166 flow [2023-11-06 22:59:02,495 INFO L124 PetriNetUnfolderBase]: 6/80 cut-off events. [2023-11-06 22:59:02,496 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:59:02,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 80 events. 6/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 104 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2023-11-06 22:59:02,499 INFO L119 LiptonReduction]: Number of co-enabled transitions 1728 [2023-11-06 22:59:05,402 INFO L134 LiptonReduction]: Checked pairs total: 1540 [2023-11-06 22:59:05,402 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-11-06 22:59:05,433 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:59:05,442 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;@3ad05af7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:59:05,442 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-06 22:59:05,445 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:59:05,445 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-06 22:59:05,446 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:59:05,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:05,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 22:59:05,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:05,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:05,455 INFO L85 PathProgramCache]: Analyzing trace with hash 330, now seen corresponding path program 1 times [2023-11-06 22:59:05,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:05,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761064480] [2023-11-06 22:59:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:05,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:05,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:05,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761064480] [2023-11-06 22:59:05,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761064480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:05,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:05,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 22:59:05,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188506170] [2023-11-06 22:59:05,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:05,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:59:05,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:05,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:59:05,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:59:05,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 167 [2023-11-06 22:59:05,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 46 flow. Second operand has 2 states, 2 states have (on average 75.5) internal successors, (151), 2 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) [2023-11-06 22:59:05,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:05,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 167 [2023-11-06 22:59:05,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:05,765 INFO L124 PetriNetUnfolderBase]: 112/179 cut-off events. [2023-11-06 22:59:05,765 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:59:05,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 179 events. 112/179 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 457 event pairs, 72 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 360. Up to 180 conditions per place. [2023-11-06 22:59:05,770 INFO L140 encePairwiseOnDemand]: 164/167 looper letters, 16 selfloop transitions, 0 changer transitions 1/17 dead transitions. [2023-11-06 22:59:05,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 74 flow [2023-11-06 22:59:05,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:59:05,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:59:05,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 170 transitions. [2023-11-06 22:59:05,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089820359281437 [2023-11-06 22:59:05,790 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 170 transitions. [2023-11-06 22:59:05,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 170 transitions. [2023-11-06 22:59:05,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:05,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 170 transitions. [2023-11-06 22:59:05,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 85.0) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:05,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:05,812 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:05,814 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 46 flow. Second operand 2 states and 170 transitions. [2023-11-06 22:59:05,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 74 flow [2023-11-06 22:59:05,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:59:05,819 INFO L231 Difference]: Finished difference. Result has 21 places, 16 transitions, 36 flow [2023-11-06 22:59:05,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=36, PETRI_PLACES=21, PETRI_TRANSITIONS=16} [2023-11-06 22:59:05,826 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -3 predicate places. [2023-11-06 22:59:05,827 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 16 transitions, 36 flow [2023-11-06 22:59:05,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 75.5) internal successors, (151), 2 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) [2023-11-06 22:59:05,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:05,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:59:05,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:59:05,828 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:05,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:05,829 INFO L85 PathProgramCache]: Analyzing trace with hash 325970, now seen corresponding path program 1 times [2023-11-06 22:59:05,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:05,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258099680] [2023-11-06 22:59:05,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:05,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:06,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:06,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258099680] [2023-11-06 22:59:06,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258099680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:06,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:06,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:59:06,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553372953] [2023-11-06 22:59:06,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:06,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:59:06,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:06,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:59:06,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:59:06,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 22:59:06,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:06,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:06,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 22:59:06,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:06,130 INFO L124 PetriNetUnfolderBase]: 91/146 cut-off events. [2023-11-06 22:59:06,130 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:59:06,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 146 events. 91/146 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 355 event pairs, 34 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 300. Up to 92 conditions per place. [2023-11-06 22:59:06,132 INFO L140 encePairwiseOnDemand]: 164/167 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-11-06 22:59:06,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 21 transitions, 88 flow [2023-11-06 22:59:06,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:59:06,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:59:06,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 223 transitions. [2023-11-06 22:59:06,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44510978043912175 [2023-11-06 22:59:06,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 223 transitions. [2023-11-06 22:59:06,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 223 transitions. [2023-11-06 22:59:06,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:06,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 223 transitions. [2023-11-06 22:59:06,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:06,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:06,141 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:06,141 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 36 flow. Second operand 3 states and 223 transitions. [2023-11-06 22:59:06,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 21 transitions, 88 flow [2023-11-06 22:59:06,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:59:06,143 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 38 flow [2023-11-06 22:59:06,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-11-06 22:59:06,144 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -3 predicate places. [2023-11-06 22:59:06,144 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 38 flow [2023-11-06 22:59:06,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:06,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:06,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:59:06,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:59:06,145 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:06,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:06,146 INFO L85 PathProgramCache]: Analyzing trace with hash 325968, now seen corresponding path program 1 times [2023-11-06 22:59:06,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:06,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314721015] [2023-11-06 22:59:06,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:06,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:06,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:06,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314721015] [2023-11-06 22:59:06,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314721015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:06,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:06,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:59:06,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441794] [2023-11-06 22:59:06,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:06,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:59:06,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:06,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:59:06,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:59:06,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 167 [2023-11-06 22:59:06,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:06,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:06,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 167 [2023-11-06 22:59:06,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:06,422 INFO L124 PetriNetUnfolderBase]: 88/140 cut-off events. [2023-11-06 22:59:06,422 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:59:06,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 140 events. 88/140 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 331 event pairs, 44 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 298. Up to 113 conditions per place. [2023-11-06 22:59:06,424 INFO L140 encePairwiseOnDemand]: 164/167 looper letters, 18 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-11-06 22:59:06,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 88 flow [2023-11-06 22:59:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:59:06,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:59:06,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2023-11-06 22:59:06,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46107784431137727 [2023-11-06 22:59:06,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2023-11-06 22:59:06,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2023-11-06 22:59:06,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:06,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2023-11-06 22:59:06,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:06,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:06,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:06,433 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 38 flow. Second operand 3 states and 231 transitions. [2023-11-06 22:59:06,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 88 flow [2023-11-06 22:59:06,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 20 transitions, 84 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:59:06,434 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 36 flow [2023-11-06 22:59:06,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=20, PETRI_TRANSITIONS=14} [2023-11-06 22:59:06,435 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -4 predicate places. [2023-11-06 22:59:06,436 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 36 flow [2023-11-06 22:59:06,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:06,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:06,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:59:06,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:59:06,437 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:06,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:06,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1121223677, now seen corresponding path program 1 times [2023-11-06 22:59:06,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:06,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44158620] [2023-11-06 22:59:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:06,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:06,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:06,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44158620] [2023-11-06 22:59:06,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44158620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:06,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:06,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:59:06,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093395270] [2023-11-06 22:59:06,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:06,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:59:06,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:06,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:59:06,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:59:06,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 167 [2023-11-06 22:59:06,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 14 transitions, 36 flow. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:06,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:06,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 167 [2023-11-06 22:59:06,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:06,844 INFO L124 PetriNetUnfolderBase]: 176/281 cut-off events. [2023-11-06 22:59:06,844 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:59:06,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 281 events. 176/281 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 886 event pairs, 12 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 598. Up to 128 conditions per place. [2023-11-06 22:59:06,850 INFO L140 encePairwiseOnDemand]: 161/167 looper letters, 31 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2023-11-06 22:59:06,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 39 transitions, 170 flow [2023-11-06 22:59:06,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:59:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:59:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 381 transitions. [2023-11-06 22:59:06,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4562874251497006 [2023-11-06 22:59:06,853 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 381 transitions. [2023-11-06 22:59:06,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 381 transitions. [2023-11-06 22:59:06,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:06,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 381 transitions. [2023-11-06 22:59:06,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.2) internal successors, (381), 5 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:06,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 167.0) internal successors, (1002), 6 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:06,860 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 167.0) internal successors, (1002), 6 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:06,860 INFO L175 Difference]: Start difference. First operand has 20 places, 14 transitions, 36 flow. Second operand 5 states and 381 transitions. [2023-11-06 22:59:06,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 39 transitions, 170 flow [2023-11-06 22:59:06,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:59:06,865 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 92 flow [2023-11-06 22:59:06,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2023-11-06 22:59:06,867 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2023-11-06 22:59:06,867 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 92 flow [2023-11-06 22:59:06,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:06,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:06,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:06,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:59:06,869 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:06,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:06,869 INFO L85 PathProgramCache]: Analyzing trace with hash 398196105, now seen corresponding path program 1 times [2023-11-06 22:59:06,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:06,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680198012] [2023-11-06 22:59:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:06,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:07,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:07,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680198012] [2023-11-06 22:59:07,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680198012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:07,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:07,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:59:07,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918137442] [2023-11-06 22:59:07,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:07,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:59:07,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:07,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:59:07,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:59:07,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 167 [2023-11-06 22:59:07,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:07,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:07,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 167 [2023-11-06 22:59:07,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:07,188 INFO L124 PetriNetUnfolderBase]: 130/212 cut-off events. [2023-11-06 22:59:07,188 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2023-11-06 22:59:07,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 212 events. 130/212 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 627 event pairs, 47 based on Foata normal form. 23/235 useless extension candidates. Maximal degree in co-relation 611. Up to 143 conditions per place. [2023-11-06 22:59:07,191 INFO L140 encePairwiseOnDemand]: 164/167 looper letters, 17 selfloop transitions, 1 changer transitions 11/29 dead transitions. [2023-11-06 22:59:07,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 29 transitions, 184 flow [2023-11-06 22:59:07,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:59:07,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:59:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 280 transitions. [2023-11-06 22:59:07,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41916167664670656 [2023-11-06 22:59:07,194 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 280 transitions. [2023-11-06 22:59:07,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 280 transitions. [2023-11-06 22:59:07,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:07,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 280 transitions. [2023-11-06 22:59:07,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:07,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:07,198 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:07,198 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 92 flow. Second operand 4 states and 280 transitions. [2023-11-06 22:59:07,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 29 transitions, 184 flow [2023-11-06 22:59:07,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 184 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:59:07,202 INFO L231 Difference]: Finished difference. Result has 28 places, 18 transitions, 82 flow [2023-11-06 22:59:07,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=28, PETRI_TRANSITIONS=18} [2023-11-06 22:59:07,205 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 4 predicate places. [2023-11-06 22:59:07,205 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 18 transitions, 82 flow [2023-11-06 22:59:07,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:07,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:07,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:07,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:59:07,207 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:07,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:07,207 INFO L85 PathProgramCache]: Analyzing trace with hash -507843160, now seen corresponding path program 1 times [2023-11-06 22:59:07,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:07,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999299384] [2023-11-06 22:59:07,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:07,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:07,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:07,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999299384] [2023-11-06 22:59:07,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999299384] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:07,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:07,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:59:07,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561929121] [2023-11-06 22:59:07,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:07,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:59:07,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:07,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:59:07,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:59:07,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 22:59:07,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 18 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 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) [2023-11-06 22:59:07,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:07,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 22:59:07,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:07,465 INFO L124 PetriNetUnfolderBase]: 92/157 cut-off events. [2023-11-06 22:59:07,465 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-11-06 22:59:07,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 157 events. 92/157 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 446 event pairs, 19 based on Foata normal form. 6/163 useless extension candidates. Maximal degree in co-relation 450. Up to 61 conditions per place. [2023-11-06 22:59:07,467 INFO L140 encePairwiseOnDemand]: 163/167 looper letters, 20 selfloop transitions, 8 changer transitions 2/30 dead transitions. [2023-11-06 22:59:07,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 30 transitions, 180 flow [2023-11-06 22:59:07,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:59:07,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:59:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 293 transitions. [2023-11-06 22:59:07,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43862275449101795 [2023-11-06 22:59:07,469 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 293 transitions. [2023-11-06 22:59:07,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 293 transitions. [2023-11-06 22:59:07,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:07,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 293 transitions. [2023-11-06 22:59:07,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:07,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:07,475 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:07,475 INFO L175 Difference]: Start difference. First operand has 28 places, 18 transitions, 82 flow. Second operand 4 states and 293 transitions. [2023-11-06 22:59:07,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 30 transitions, 180 flow [2023-11-06 22:59:07,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 30 transitions, 174 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:59:07,479 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 120 flow [2023-11-06 22:59:07,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2023-11-06 22:59:07,482 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2023-11-06 22:59:07,486 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 120 flow [2023-11-06 22:59:07,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 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) [2023-11-06 22:59:07,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:07,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:07,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:59:07,487 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:07,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:07,488 INFO L85 PathProgramCache]: Analyzing trace with hash -541296717, now seen corresponding path program 1 times [2023-11-06 22:59:07,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:07,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764362847] [2023-11-06 22:59:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:07,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:07,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:07,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764362847] [2023-11-06 22:59:07,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764362847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:07,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:07,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:59:07,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834187353] [2023-11-06 22:59:07,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:07,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:59:07,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:07,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:59:07,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:59:07,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 22:59:07,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 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) [2023-11-06 22:59:07,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:07,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 22:59:07,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:07,739 INFO L124 PetriNetUnfolderBase]: 132/229 cut-off events. [2023-11-06 22:59:07,740 INFO L125 PetriNetUnfolderBase]: For 291/291 co-relation queries the response was YES. [2023-11-06 22:59:07,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 229 events. 132/229 cut-off events. For 291/291 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 718 event pairs, 23 based on Foata normal form. 10/239 useless extension candidates. Maximal degree in co-relation 749. Up to 101 conditions per place. [2023-11-06 22:59:07,742 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 34 selfloop transitions, 11 changer transitions 0/45 dead transitions. [2023-11-06 22:59:07,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 45 transitions, 302 flow [2023-11-06 22:59:07,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:59:07,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:59:07,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 440 transitions. [2023-11-06 22:59:07,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43912175648702595 [2023-11-06 22:59:07,746 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 440 transitions. [2023-11-06 22:59:07,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 440 transitions. [2023-11-06 22:59:07,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:07,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 440 transitions. [2023-11-06 22:59:07,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 73.33333333333333) internal successors, (440), 6 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:07,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 167.0) internal successors, (1169), 7 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:07,751 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 167.0) internal successors, (1169), 7 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:07,751 INFO L175 Difference]: Start difference. First operand has 29 places, 21 transitions, 120 flow. Second operand 6 states and 440 transitions. [2023-11-06 22:59:07,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 45 transitions, 302 flow [2023-11-06 22:59:07,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 45 transitions, 286 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-11-06 22:59:07,755 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 204 flow [2023-11-06 22:59:07,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=204, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2023-11-06 22:59:07,756 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 13 predicate places. [2023-11-06 22:59:07,756 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 204 flow [2023-11-06 22:59:07,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 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) [2023-11-06 22:59:07,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:07,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:07,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:59:07,758 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:07,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:07,759 INFO L85 PathProgramCache]: Analyzing trace with hash -541273467, now seen corresponding path program 2 times [2023-11-06 22:59:07,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:07,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058616091] [2023-11-06 22:59:07,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:07,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:07,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:07,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058616091] [2023-11-06 22:59:07,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058616091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:07,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:07,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:59:07,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001715056] [2023-11-06 22:59:07,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:07,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:59:07,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:07,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:59:07,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:59:07,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 22:59:07,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 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) [2023-11-06 22:59:07,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:07,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 22:59:07,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:08,018 INFO L124 PetriNetUnfolderBase]: 114/199 cut-off events. [2023-11-06 22:59:08,019 INFO L125 PetriNetUnfolderBase]: For 486/486 co-relation queries the response was YES. [2023-11-06 22:59:08,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 199 events. 114/199 cut-off events. For 486/486 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 632 event pairs, 23 based on Foata normal form. 10/209 useless extension candidates. Maximal degree in co-relation 762. Up to 84 conditions per place. [2023-11-06 22:59:08,021 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 29 selfloop transitions, 11 changer transitions 4/44 dead transitions. [2023-11-06 22:59:08,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 44 transitions, 350 flow [2023-11-06 22:59:08,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:59:08,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:59:08,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 368 transitions. [2023-11-06 22:59:08,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4407185628742515 [2023-11-06 22:59:08,024 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 368 transitions. [2023-11-06 22:59:08,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 368 transitions. [2023-11-06 22:59:08,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:08,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 368 transitions. [2023-11-06 22:59:08,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.6) internal successors, (368), 5 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:08,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 167.0) internal successors, (1002), 6 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:08,029 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 167.0) internal successors, (1002), 6 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:08,029 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 204 flow. Second operand 5 states and 368 transitions. [2023-11-06 22:59:08,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 44 transitions, 350 flow [2023-11-06 22:59:08,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 336 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-11-06 22:59:08,035 INFO L231 Difference]: Finished difference. Result has 43 places, 29 transitions, 237 flow [2023-11-06 22:59:08,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=43, PETRI_TRANSITIONS=29} [2023-11-06 22:59:08,036 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 19 predicate places. [2023-11-06 22:59:08,036 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 29 transitions, 237 flow [2023-11-06 22:59:08,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 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) [2023-11-06 22:59:08,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:08,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:08,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:59:08,037 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:08,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:08,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1548318116, now seen corresponding path program 1 times [2023-11-06 22:59:08,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:08,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170590138] [2023-11-06 22:59:08,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:08,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:08,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:08,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170590138] [2023-11-06 22:59:08,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170590138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:08,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:08,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:59:08,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476555985] [2023-11-06 22:59:08,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:08,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:59:08,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:08,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:59:08,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:59:08,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 22:59:08,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 29 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 68.66666666666667) internal successors, (412), 6 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:08,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:08,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 22:59:08,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:08,344 INFO L124 PetriNetUnfolderBase]: 150/263 cut-off events. [2023-11-06 22:59:08,344 INFO L125 PetriNetUnfolderBase]: For 1047/1047 co-relation queries the response was YES. [2023-11-06 22:59:08,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 263 events. 150/263 cut-off events. For 1047/1047 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 864 event pairs, 20 based on Foata normal form. 8/271 useless extension candidates. Maximal degree in co-relation 1079. Up to 73 conditions per place. [2023-11-06 22:59:08,347 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 35 selfloop transitions, 20 changer transitions 3/58 dead transitions. [2023-11-06 22:59:08,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 497 flow [2023-11-06 22:59:08,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:59:08,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:59:08,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 582 transitions. [2023-11-06 22:59:08,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356287425149701 [2023-11-06 22:59:08,352 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 582 transitions. [2023-11-06 22:59:08,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 582 transitions. [2023-11-06 22:59:08,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:08,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 582 transitions. [2023-11-06 22:59:08,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 72.75) internal successors, (582), 8 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:08,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 167.0) internal successors, (1503), 9 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:08,358 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 167.0) internal successors, (1503), 9 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:08,359 INFO L175 Difference]: Start difference. First operand has 43 places, 29 transitions, 237 flow. Second operand 8 states and 582 transitions. [2023-11-06 22:59:08,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 497 flow [2023-11-06 22:59:08,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 458 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-11-06 22:59:08,367 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 337 flow [2023-11-06 22:59:08,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=337, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-11-06 22:59:08,368 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 26 predicate places. [2023-11-06 22:59:08,368 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 337 flow [2023-11-06 22:59:08,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 68.66666666666667) internal successors, (412), 6 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:08,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:08,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:08,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:59:08,369 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:08,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:08,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1588559216, now seen corresponding path program 2 times [2023-11-06 22:59:08,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:08,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701727868] [2023-11-06 22:59:08,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:08,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:08,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:08,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701727868] [2023-11-06 22:59:08,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701727868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:08,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:08,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:59:08,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241582284] [2023-11-06 22:59:08,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:08,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:59:08,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:08,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:59:08,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:59:08,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 22:59:08,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 68.66666666666667) internal successors, (412), 6 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:08,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:08,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 22:59:08,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:08,725 INFO L124 PetriNetUnfolderBase]: 146/255 cut-off events. [2023-11-06 22:59:08,725 INFO L125 PetriNetUnfolderBase]: For 1357/1357 co-relation queries the response was YES. [2023-11-06 22:59:08,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1213 conditions, 255 events. 146/255 cut-off events. For 1357/1357 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 844 event pairs, 18 based on Foata normal form. 8/263 useless extension candidates. Maximal degree in co-relation 1193. Up to 75 conditions per place. [2023-11-06 22:59:08,729 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 28 selfloop transitions, 22 changer transitions 10/60 dead transitions. [2023-11-06 22:59:08,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 603 flow [2023-11-06 22:59:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:59:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:59:08,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 581 transitions. [2023-11-06 22:59:08,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488023952095806 [2023-11-06 22:59:08,733 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 581 transitions. [2023-11-06 22:59:08,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 581 transitions. [2023-11-06 22:59:08,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:08,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 581 transitions. [2023-11-06 22:59:08,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 72.625) internal successors, (581), 8 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:08,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 167.0) internal successors, (1503), 9 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:08,741 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 167.0) internal successors, (1503), 9 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:08,742 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 337 flow. Second operand 8 states and 581 transitions. [2023-11-06 22:59:08,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 603 flow [2023-11-06 22:59:08,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 552 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-11-06 22:59:08,754 INFO L231 Difference]: Finished difference. Result has 57 places, 38 transitions, 396 flow [2023-11-06 22:59:08,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=396, PETRI_PLACES=57, PETRI_TRANSITIONS=38} [2023-11-06 22:59:08,755 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 33 predicate places. [2023-11-06 22:59:08,755 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 38 transitions, 396 flow [2023-11-06 22:59:08,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 68.66666666666667) internal successors, (412), 6 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:08,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:08,756 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:08,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:59:08,757 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:08,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:08,757 INFO L85 PathProgramCache]: Analyzing trace with hash 726265661, now seen corresponding path program 3 times [2023-11-06 22:59:08,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:08,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268864096] [2023-11-06 22:59:08,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:08,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:08,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:08,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:08,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268864096] [2023-11-06 22:59:08,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268864096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:08,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768549700] [2023-11-06 22:59:08,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:59:08,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:08,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:08,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:08,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:59:09,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:59:09,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:09,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:59:09,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:09,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:09,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768549700] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:09,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:09,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-06 22:59:09,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752424928] [2023-11-06 22:59:09,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:09,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:59:09,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:09,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:59:09,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:59:09,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 22:59:09,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 38 transitions, 396 flow. Second operand has 12 states, 12 states have (on average 68.91666666666667) internal successors, (827), 12 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:09,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:09,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 22:59:09,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:09,615 INFO L124 PetriNetUnfolderBase]: 170/303 cut-off events. [2023-11-06 22:59:09,615 INFO L125 PetriNetUnfolderBase]: For 2376/2376 co-relation queries the response was YES. [2023-11-06 22:59:09,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1523 conditions, 303 events. 170/303 cut-off events. For 2376/2376 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 994 event pairs, 35 based on Foata normal form. 24/327 useless extension candidates. Maximal degree in co-relation 1500. Up to 161 conditions per place. [2023-11-06 22:59:09,619 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 42 selfloop transitions, 17 changer transitions 19/78 dead transitions. [2023-11-06 22:59:09,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 818 flow [2023-11-06 22:59:09,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:59:09,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:59:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 869 transitions. [2023-11-06 22:59:09,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43363273453093815 [2023-11-06 22:59:09,624 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 869 transitions. [2023-11-06 22:59:09,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 869 transitions. [2023-11-06 22:59:09,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:09,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 869 transitions. [2023-11-06 22:59:09,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 72.41666666666667) internal successors, (869), 12 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:09,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 167.0) internal successors, (2171), 13 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:09,634 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 167.0) internal successors, (2171), 13 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:09,634 INFO L175 Difference]: Start difference. First operand has 57 places, 38 transitions, 396 flow. Second operand 12 states and 869 transitions. [2023-11-06 22:59:09,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 818 flow [2023-11-06 22:59:09,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 769 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-11-06 22:59:09,646 INFO L231 Difference]: Finished difference. Result has 69 places, 44 transitions, 507 flow [2023-11-06 22:59:09,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=507, PETRI_PLACES=69, PETRI_TRANSITIONS=44} [2023-11-06 22:59:09,647 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 45 predicate places. [2023-11-06 22:59:09,647 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 44 transitions, 507 flow [2023-11-06 22:59:09,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 68.91666666666667) internal successors, (827), 12 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:09,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:09,648 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:09,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:09,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:59:09,854 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:09,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:09,854 INFO L85 PathProgramCache]: Analyzing trace with hash 748608911, now seen corresponding path program 4 times [2023-11-06 22:59:09,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:09,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859747703] [2023-11-06 22:59:09,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:09,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:09,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:10,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:10,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:10,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859747703] [2023-11-06 22:59:10,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859747703] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:10,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924463082] [2023-11-06 22:59:10,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:59:10,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:10,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:10,061 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:10,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:59:10,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:59:10,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:10,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:59:10,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:10,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:10,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924463082] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:10,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:10,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 22:59:10,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626466361] [2023-11-06 22:59:10,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:10,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:59:10,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:10,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:59:10,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:59:10,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 22:59:10,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 44 transitions, 507 flow. Second operand has 13 states, 13 states have (on average 68.92307692307692) internal successors, (896), 13 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:10,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:10,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 22:59:10,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:10,826 INFO L124 PetriNetUnfolderBase]: 244/439 cut-off events. [2023-11-06 22:59:10,826 INFO L125 PetriNetUnfolderBase]: For 6604/6604 co-relation queries the response was YES. [2023-11-06 22:59:10,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2537 conditions, 439 events. 244/439 cut-off events. For 6604/6604 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1683 event pairs, 28 based on Foata normal form. 28/467 useless extension candidates. Maximal degree in co-relation 2508. Up to 134 conditions per place. [2023-11-06 22:59:10,832 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 46 selfloop transitions, 42 changer transitions 29/117 dead transitions. [2023-11-06 22:59:10,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 1396 flow [2023-11-06 22:59:10,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:59:10,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:59:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1303 transitions. [2023-11-06 22:59:10,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4334664005322688 [2023-11-06 22:59:10,839 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1303 transitions. [2023-11-06 22:59:10,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1303 transitions. [2023-11-06 22:59:10,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:10,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1303 transitions. [2023-11-06 22:59:10,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 72.38888888888889) internal successors, (1303), 18 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:10,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 167.0) internal successors, (3173), 19 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:10,853 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 167.0) internal successors, (3173), 19 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:10,853 INFO L175 Difference]: Start difference. First operand has 69 places, 44 transitions, 507 flow. Second operand 18 states and 1303 transitions. [2023-11-06 22:59:10,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 1396 flow [2023-11-06 22:59:10,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 117 transitions, 1282 flow, removed 46 selfloop flow, removed 5 redundant places. [2023-11-06 22:59:10,879 INFO L231 Difference]: Finished difference. Result has 92 places, 64 transitions, 912 flow [2023-11-06 22:59:10,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=912, PETRI_PLACES=92, PETRI_TRANSITIONS=64} [2023-11-06 22:59:10,880 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 68 predicate places. [2023-11-06 22:59:10,880 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 64 transitions, 912 flow [2023-11-06 22:59:10,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 68.92307692307692) internal successors, (896), 13 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:10,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:10,882 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:10,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:11,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:59:11,088 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:11,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:11,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1875041737, now seen corresponding path program 5 times [2023-11-06 22:59:11,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:11,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853851342] [2023-11-06 22:59:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:11,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:11,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:11,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853851342] [2023-11-06 22:59:11,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853851342] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:11,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857672618] [2023-11-06 22:59:11,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:59:11,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:11,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:11,227 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:11,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:59:11,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:59:11,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:11,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:59:11,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:11,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:11,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857672618] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:11,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:11,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:59:11,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809032266] [2023-11-06 22:59:11,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:11,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:59:11,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:11,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:59:11,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:59:11,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 22:59:11,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 64 transitions, 912 flow. Second operand has 14 states, 14 states have (on average 68.78571428571429) internal successors, (963), 14 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:11,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:11,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 22:59:11,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:12,007 INFO L124 PetriNetUnfolderBase]: 328/599 cut-off events. [2023-11-06 22:59:12,007 INFO L125 PetriNetUnfolderBase]: For 16186/16186 co-relation queries the response was YES. [2023-11-06 22:59:12,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4540 conditions, 599 events. 328/599 cut-off events. For 16186/16186 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2509 event pairs, 27 based on Foata normal form. 24/623 useless extension candidates. Maximal degree in co-relation 4500. Up to 210 conditions per place. [2023-11-06 22:59:12,017 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 56 selfloop transitions, 58 changer transitions 19/133 dead transitions. [2023-11-06 22:59:12,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 133 transitions, 2191 flow [2023-11-06 22:59:12,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:59:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:59:12,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1298 transitions. [2023-11-06 22:59:12,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318030605455755 [2023-11-06 22:59:12,023 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1298 transitions. [2023-11-06 22:59:12,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1298 transitions. [2023-11-06 22:59:12,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:12,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1298 transitions. [2023-11-06 22:59:12,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 72.11111111111111) internal successors, (1298), 18 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:12,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 167.0) internal successors, (3173), 19 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:12,035 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 167.0) internal successors, (3173), 19 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:12,036 INFO L175 Difference]: Start difference. First operand has 92 places, 64 transitions, 912 flow. Second operand 18 states and 1298 transitions. [2023-11-06 22:59:12,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 133 transitions, 2191 flow [2023-11-06 22:59:12,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 133 transitions, 1901 flow, removed 139 selfloop flow, removed 3 redundant places. [2023-11-06 22:59:12,081 INFO L231 Difference]: Finished difference. Result has 114 places, 80 transitions, 1286 flow [2023-11-06 22:59:12,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1286, PETRI_PLACES=114, PETRI_TRANSITIONS=80} [2023-11-06 22:59:12,085 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 90 predicate places. [2023-11-06 22:59:12,085 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 80 transitions, 1286 flow [2023-11-06 22:59:12,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 68.78571428571429) internal successors, (963), 14 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:12,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:12,086 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:12,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:12,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:59:12,297 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:12,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:12,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1892921323, now seen corresponding path program 6 times [2023-11-06 22:59:12,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:12,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261886212] [2023-11-06 22:59:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:12,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:12,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:12,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261886212] [2023-11-06 22:59:12,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261886212] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:12,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212719616] [2023-11-06 22:59:12,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:59:12,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:12,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:12,444 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:12,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:59:12,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:59:12,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:12,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:59:12,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:12,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:12,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212719616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:12,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:12,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:59:12,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914549016] [2023-11-06 22:59:12,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:12,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:59:12,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:12,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:59:12,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:59:12,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 22:59:12,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 80 transitions, 1286 flow. Second operand has 14 states, 14 states have (on average 68.78571428571429) internal successors, (963), 14 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:12,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:12,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 22:59:12,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:13,334 INFO L124 PetriNetUnfolderBase]: 388/707 cut-off events. [2023-11-06 22:59:13,334 INFO L125 PetriNetUnfolderBase]: For 30680/30680 co-relation queries the response was YES. [2023-11-06 22:59:13,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6075 conditions, 707 events. 388/707 cut-off events. For 30680/30680 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3056 event pairs, 12 based on Foata normal form. 28/735 useless extension candidates. Maximal degree in co-relation 6026. Up to 247 conditions per place. [2023-11-06 22:59:13,347 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 46 selfloop transitions, 84 changer transitions 38/168 dead transitions. [2023-11-06 22:59:13,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 168 transitions, 3084 flow [2023-11-06 22:59:13,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:59:13,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:59:13,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1590 transitions. [2023-11-06 22:59:13,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4327708219923789 [2023-11-06 22:59:13,355 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1590 transitions. [2023-11-06 22:59:13,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1590 transitions. [2023-11-06 22:59:13,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:13,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1590 transitions. [2023-11-06 22:59:13,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 72.27272727272727) internal successors, (1590), 22 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:13,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 167.0) internal successors, (3841), 23 states have internal predecessors, (3841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:13,371 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 167.0) internal successors, (3841), 23 states have internal predecessors, (3841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:13,371 INFO L175 Difference]: Start difference. First operand has 114 places, 80 transitions, 1286 flow. Second operand 22 states and 1590 transitions. [2023-11-06 22:59:13,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 168 transitions, 3084 flow [2023-11-06 22:59:13,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 168 transitions, 2492 flow, removed 261 selfloop flow, removed 12 redundant places. [2023-11-06 22:59:13,493 INFO L231 Difference]: Finished difference. Result has 134 places, 101 transitions, 1744 flow [2023-11-06 22:59:13,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=946, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1744, PETRI_PLACES=134, PETRI_TRANSITIONS=101} [2023-11-06 22:59:13,495 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 110 predicate places. [2023-11-06 22:59:13,495 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 101 transitions, 1744 flow [2023-11-06 22:59:13,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 68.78571428571429) internal successors, (963), 14 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:13,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:13,496 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:13,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:13,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:59:13,703 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:13,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:13,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1884854321, now seen corresponding path program 7 times [2023-11-06 22:59:13,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:13,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988857256] [2023-11-06 22:59:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:13,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:13,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:13,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988857256] [2023-11-06 22:59:14,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988857256] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:14,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078117352] [2023-11-06 22:59:14,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:59:14,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:14,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:14,001 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:14,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:59:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:14,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:59:14,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:14,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:14,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078117352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:14,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:14,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-11-06 22:59:14,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071797494] [2023-11-06 22:59:14,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:14,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:59:14,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:14,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:59:14,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:59:14,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 22:59:14,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 101 transitions, 1744 flow. Second operand has 23 states, 23 states have (on average 68.47826086956522) internal successors, (1575), 23 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:14,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:14,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 22:59:14,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:15,494 INFO L124 PetriNetUnfolderBase]: 536/955 cut-off events. [2023-11-06 22:59:15,494 INFO L125 PetriNetUnfolderBase]: For 48124/48124 co-relation queries the response was YES. [2023-11-06 22:59:15,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9053 conditions, 955 events. 536/955 cut-off events. For 48124/48124 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4100 event pairs, 15 based on Foata normal form. 36/991 useless extension candidates. Maximal degree in co-relation 8996. Up to 339 conditions per place. [2023-11-06 22:59:15,511 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 60 selfloop transitions, 121 changer transitions 66/247 dead transitions. [2023-11-06 22:59:15,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 247 transitions, 5062 flow [2023-11-06 22:59:15,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 22:59:15,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-06 22:59:15,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2594 transitions. [2023-11-06 22:59:15,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314703925482369 [2023-11-06 22:59:15,519 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2594 transitions. [2023-11-06 22:59:15,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2594 transitions. [2023-11-06 22:59:15,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:15,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2594 transitions. [2023-11-06 22:59:15,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 72.05555555555556) internal successors, (2594), 36 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:15,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 167.0) internal successors, (6179), 37 states have internal predecessors, (6179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:15,546 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 167.0) internal successors, (6179), 37 states have internal predecessors, (6179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:15,546 INFO L175 Difference]: Start difference. First operand has 134 places, 101 transitions, 1744 flow. Second operand 36 states and 2594 transitions. [2023-11-06 22:59:15,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 247 transitions, 5062 flow [2023-11-06 22:59:15,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 247 transitions, 4410 flow, removed 289 selfloop flow, removed 14 redundant places. [2023-11-06 22:59:15,663 INFO L231 Difference]: Finished difference. Result has 173 places, 138 transitions, 2788 flow [2023-11-06 22:59:15,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=1362, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2788, PETRI_PLACES=173, PETRI_TRANSITIONS=138} [2023-11-06 22:59:15,664 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 149 predicate places. [2023-11-06 22:59:15,664 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 138 transitions, 2788 flow [2023-11-06 22:59:15,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 68.47826086956522) internal successors, (1575), 23 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:15,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:15,666 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:15,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:15,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:59:15,872 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:15,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:15,873 INFO L85 PathProgramCache]: Analyzing trace with hash -92387390, now seen corresponding path program 8 times [2023-11-06 22:59:15,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:15,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951773638] [2023-11-06 22:59:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:15,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:16,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:16,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951773638] [2023-11-06 22:59:16,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951773638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:16,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714792374] [2023-11-06 22:59:16,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:59:16,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:16,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:16,279 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:16,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:59:16,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:59:16,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:16,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:59:16,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:16,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:16,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714792374] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:16,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:16,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2023-11-06 22:59:16,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644956265] [2023-11-06 22:59:16,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:16,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 22:59:16,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:16,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 22:59:16,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:59:17,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 22:59:17,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 138 transitions, 2788 flow. Second operand has 34 states, 34 states have (on average 68.32352941176471) internal successors, (2323), 34 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:17,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:17,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 22:59:17,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:18,471 INFO L124 PetriNetUnfolderBase]: 712/1307 cut-off events. [2023-11-06 22:59:18,472 INFO L125 PetriNetUnfolderBase]: For 124631/124631 co-relation queries the response was YES. [2023-11-06 22:59:18,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15732 conditions, 1307 events. 712/1307 cut-off events. For 124631/124631 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 5843 event pairs, 104 based on Foata normal form. 64/1371 useless extension candidates. Maximal degree in co-relation 15661. Up to 515 conditions per place. [2023-11-06 22:59:18,500 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 115 selfloop transitions, 108 changer transitions 71/294 dead transitions. [2023-11-06 22:59:18,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 294 transitions, 7781 flow [2023-11-06 22:59:18,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 22:59:18,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-06 22:59:18,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2727 transitions. [2023-11-06 22:59:18,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297195083517176 [2023-11-06 22:59:18,507 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2727 transitions. [2023-11-06 22:59:18,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2727 transitions. [2023-11-06 22:59:18,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:18,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2727 transitions. [2023-11-06 22:59:18,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 71.76315789473684) internal successors, (2727), 38 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:18,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 167.0) internal successors, (6513), 39 states have internal predecessors, (6513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:18,546 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 167.0) internal successors, (6513), 39 states have internal predecessors, (6513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:18,546 INFO L175 Difference]: Start difference. First operand has 173 places, 138 transitions, 2788 flow. Second operand 38 states and 2727 transitions. [2023-11-06 22:59:18,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 294 transitions, 7781 flow [2023-11-06 22:59:18,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 294 transitions, 6115 flow, removed 809 selfloop flow, removed 12 redundant places. [2023-11-06 22:59:18,961 INFO L231 Difference]: Finished difference. Result has 214 places, 182 transitions, 3772 flow [2023-11-06 22:59:18,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3772, PETRI_PLACES=214, PETRI_TRANSITIONS=182} [2023-11-06 22:59:18,963 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 190 predicate places. [2023-11-06 22:59:18,963 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 182 transitions, 3772 flow [2023-11-06 22:59:18,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 68.32352941176471) internal successors, (2323), 34 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:18,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:18,964 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:18,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:19,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:59:19,170 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:19,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:19,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1131100696, now seen corresponding path program 9 times [2023-11-06 22:59:19,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:19,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945141528] [2023-11-06 22:59:19,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:19,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:19,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:19,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945141528] [2023-11-06 22:59:19,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945141528] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:19,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312970260] [2023-11-06 22:59:19,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:59:19,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:19,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:19,544 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:19,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:59:19,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-06 22:59:19,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:19,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:59:19,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:19,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:20,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312970260] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:20,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:20,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2023-11-06 22:59:20,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143185663] [2023-11-06 22:59:20,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:20,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 22:59:20,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:20,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 22:59:20,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:59:20,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 22:59:20,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 182 transitions, 3772 flow. Second operand has 34 states, 34 states have (on average 68.32352941176471) internal successors, (2323), 34 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:20,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:20,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 22:59:20,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:22,161 INFO L124 PetriNetUnfolderBase]: 952/1771 cut-off events. [2023-11-06 22:59:22,161 INFO L125 PetriNetUnfolderBase]: For 276687/276687 co-relation queries the response was YES. [2023-11-06 22:59:22,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23425 conditions, 1771 events. 952/1771 cut-off events. For 276687/276687 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 8464 event pairs, 46 based on Foata normal form. 64/1835 useless extension candidates. Maximal degree in co-relation 23341. Up to 739 conditions per place. [2023-11-06 22:59:22,211 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 82 selfloop transitions, 210 changer transitions 87/379 dead transitions. [2023-11-06 22:59:22,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 379 transitions, 10088 flow [2023-11-06 22:59:22,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 22:59:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-06 22:59:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3302 transitions. [2023-11-06 22:59:22,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42983598021348607 [2023-11-06 22:59:22,225 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3302 transitions. [2023-11-06 22:59:22,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3302 transitions. [2023-11-06 22:59:22,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:22,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3302 transitions. [2023-11-06 22:59:22,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 71.78260869565217) internal successors, (3302), 46 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:22,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 167.0) internal successors, (7849), 47 states have internal predecessors, (7849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:22,253 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 167.0) internal successors, (7849), 47 states have internal predecessors, (7849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:22,253 INFO L175 Difference]: Start difference. First operand has 214 places, 182 transitions, 3772 flow. Second operand 46 states and 3302 transitions. [2023-11-06 22:59:22,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 379 transitions, 10088 flow [2023-11-06 22:59:22,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 379 transitions, 9032 flow, removed 492 selfloop flow, removed 12 redundant places. [2023-11-06 22:59:22,821 INFO L231 Difference]: Finished difference. Result has 269 places, 244 transitions, 5631 flow [2023-11-06 22:59:22,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=2912, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=5631, PETRI_PLACES=269, PETRI_TRANSITIONS=244} [2023-11-06 22:59:22,822 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 245 predicate places. [2023-11-06 22:59:22,822 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 244 transitions, 5631 flow [2023-11-06 22:59:22,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 68.32352941176471) internal successors, (2323), 34 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:22,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:22,824 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:22,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:23,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:59:23,030 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:23,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:23,031 INFO L85 PathProgramCache]: Analyzing trace with hash 774763282, now seen corresponding path program 10 times [2023-11-06 22:59:23,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:23,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113407900] [2023-11-06 22:59:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:23,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:23,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:23,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113407900] [2023-11-06 22:59:23,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113407900] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:23,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388039621] [2023-11-06 22:59:23,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:59:23,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:23,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:23,393 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:23,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:59:23,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:59:23,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:23,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:59:23,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:23,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:23,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388039621] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:23,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:23,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2023-11-06 22:59:23,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447560697] [2023-11-06 22:59:23,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:23,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 22:59:23,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:23,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 22:59:23,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:59:24,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 22:59:24,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 244 transitions, 5631 flow. Second operand has 34 states, 34 states have (on average 68.32352941176471) internal successors, (2323), 34 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:24,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:24,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 22:59:24,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:26,832 INFO L124 PetriNetUnfolderBase]: 1188/2179 cut-off events. [2023-11-06 22:59:26,833 INFO L125 PetriNetUnfolderBase]: For 527041/527041 co-relation queries the response was YES. [2023-11-06 22:59:26,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35121 conditions, 2179 events. 1188/2179 cut-off events. For 527041/527041 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 10372 event pairs, 12 based on Foata normal form. 68/2247 useless extension candidates. Maximal degree in co-relation 35014. Up to 911 conditions per place. [2023-11-06 22:59:26,902 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 88 selfloop transitions, 284 changer transitions 118/490 dead transitions. [2023-11-06 22:59:26,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 490 transitions, 16104 flow [2023-11-06 22:59:26,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-06 22:59:26,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-11-06 22:59:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4460 transitions. [2023-11-06 22:59:26,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307514004249565 [2023-11-06 22:59:26,921 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4460 transitions. [2023-11-06 22:59:26,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4460 transitions. [2023-11-06 22:59:26,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:26,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4460 transitions. [2023-11-06 22:59:26,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 71.93548387096774) internal successors, (4460), 62 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:26,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 167.0) internal successors, (10521), 63 states have internal predecessors, (10521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:26,965 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 167.0) internal successors, (10521), 63 states have internal predecessors, (10521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:26,965 INFO L175 Difference]: Start difference. First operand has 269 places, 244 transitions, 5631 flow. Second operand 62 states and 4460 transitions. [2023-11-06 22:59:26,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 490 transitions, 16104 flow [2023-11-06 22:59:28,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 490 transitions, 14073 flow, removed 931 selfloop flow, removed 16 redundant places. [2023-11-06 22:59:28,238 INFO L231 Difference]: Finished difference. Result has 346 places, 303 transitions, 8357 flow [2023-11-06 22:59:28,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=4116, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=8357, PETRI_PLACES=346, PETRI_TRANSITIONS=303} [2023-11-06 22:59:28,239 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 322 predicate places. [2023-11-06 22:59:28,239 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 303 transitions, 8357 flow [2023-11-06 22:59:28,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 68.32352941176471) internal successors, (2323), 34 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:28,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:28,241 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:28,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:28,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:59:28,447 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:28,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1612500993, now seen corresponding path program 11 times [2023-11-06 22:59:28,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:28,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521298535] [2023-11-06 22:59:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:28,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:29,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:29,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521298535] [2023-11-06 22:59:29,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521298535] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:29,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863982379] [2023-11-06 22:59:29,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:59:29,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:29,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:29,296 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:29,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:59:29,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-11-06 22:59:29,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:29,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:59:29,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:29,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:30,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863982379] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:30,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:30,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 61 [2023-11-06 22:59:30,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758286868] [2023-11-06 22:59:30,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:30,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-06 22:59:30,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:30,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-06 22:59:30,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=917, Invalid=2989, Unknown=0, NotChecked=0, Total=3906 [2023-11-06 22:59:30,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 22:59:30,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 303 transitions, 8357 flow. Second operand has 63 states, 63 states have (on average 68.17460317460318) internal successors, (4295), 63 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:30,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:30,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 22:59:30,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:35,398 INFO L124 PetriNetUnfolderBase]: 1616/2931 cut-off events. [2023-11-06 22:59:35,398 INFO L125 PetriNetUnfolderBase]: For 1154635/1154635 co-relation queries the response was YES. [2023-11-06 22:59:35,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59883 conditions, 2931 events. 1616/2931 cut-off events. For 1154635/1154635 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 13885 event pairs, 15 based on Foata normal form. 60/2991 useless extension candidates. Maximal degree in co-relation 59744. Up to 1219 conditions per place. [2023-11-06 22:59:35,509 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 116 selfloop transitions, 391 changer transitions 170/677 dead transitions. [2023-11-06 22:59:35,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 677 transitions, 27522 flow [2023-11-06 22:59:35,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-11-06 22:59:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2023-11-06 22:59:35,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 6318 transitions. [2023-11-06 22:59:35,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4299129014697877 [2023-11-06 22:59:35,524 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 6318 transitions. [2023-11-06 22:59:35,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 6318 transitions. [2023-11-06 22:59:35,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:35,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 6318 transitions. [2023-11-06 22:59:35,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 71.79545454545455) internal successors, (6318), 88 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:35,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 167.0) internal successors, (14863), 89 states have internal predecessors, (14863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:35,567 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 167.0) internal successors, (14863), 89 states have internal predecessors, (14863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:35,567 INFO L175 Difference]: Start difference. First operand has 346 places, 303 transitions, 8357 flow. Second operand 88 states and 6318 transitions. [2023-11-06 22:59:35,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 677 transitions, 27522 flow [2023-11-06 22:59:38,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 677 transitions, 22220 flow, removed 2536 selfloop flow, removed 26 redundant places. [2023-11-06 22:59:38,478 INFO L231 Difference]: Finished difference. Result has 437 places, 410 transitions, 11175 flow [2023-11-06 22:59:38,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=5325, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=11175, PETRI_PLACES=437, PETRI_TRANSITIONS=410} [2023-11-06 22:59:38,479 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 413 predicate places. [2023-11-06 22:59:38,479 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 410 transitions, 11175 flow [2023-11-06 22:59:38,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 68.17460317460318) internal successors, (4295), 63 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:38,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:38,481 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:38,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:38,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:38,687 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:38,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:38,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1217506979, now seen corresponding path program 12 times [2023-11-06 22:59:38,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:38,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310521158] [2023-11-06 22:59:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:38,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:40,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:40,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310521158] [2023-11-06 22:59:40,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310521158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:40,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824890830] [2023-11-06 22:59:40,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:59:40,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:40,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:40,221 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:40,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:59:40,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2023-11-06 22:59:40,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:40,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 22:59:40,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:40,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:40,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824890830] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:40,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:40,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-11-06 22:59:40,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012461040] [2023-11-06 22:59:40,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:40,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 22:59:40,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:40,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 22:59:40,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=1426, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 22:59:41,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 22:59:41,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 410 transitions, 11175 flow. Second operand has 44 states, 44 states have (on average 68.0909090909091) internal successors, (2996), 44 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:41,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:41,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 22:59:41,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:44,317 INFO L124 PetriNetUnfolderBase]: 1712/3123 cut-off events. [2023-11-06 22:59:44,318 INFO L125 PetriNetUnfolderBase]: For 1678102/1678102 co-relation queries the response was YES. [2023-11-06 22:59:44,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71487 conditions, 3123 events. 1712/3123 cut-off events. For 1678102/1678102 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 15120 event pairs, 546 based on Foata normal form. 8/3131 useless extension candidates. Maximal degree in co-relation 71321. Up to 2305 conditions per place. [2023-11-06 22:59:44,421 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 385 selfloop transitions, 99 changer transitions 87/571 dead transitions. [2023-11-06 22:59:44,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 571 transitions, 22182 flow [2023-11-06 22:59:44,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 22:59:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-06 22:59:44,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3279 transitions. [2023-11-06 22:59:44,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42684196823743814 [2023-11-06 22:59:44,428 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3279 transitions. [2023-11-06 22:59:44,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3279 transitions. [2023-11-06 22:59:44,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:44,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3279 transitions. [2023-11-06 22:59:44,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 71.28260869565217) internal successors, (3279), 46 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:44,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 167.0) internal successors, (7849), 47 states have internal predecessors, (7849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:44,452 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 167.0) internal successors, (7849), 47 states have internal predecessors, (7849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:44,452 INFO L175 Difference]: Start difference. First operand has 437 places, 410 transitions, 11175 flow. Second operand 46 states and 3279 transitions. [2023-11-06 22:59:44,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 571 transitions, 22182 flow [2023-11-06 22:59:49,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 571 transitions, 15660 flow, removed 3078 selfloop flow, removed 34 redundant places. [2023-11-06 22:59:49,521 INFO L231 Difference]: Finished difference. Result has 456 places, 434 transitions, 8104 flow [2023-11-06 22:59:49,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=7249, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=8104, PETRI_PLACES=456, PETRI_TRANSITIONS=434} [2023-11-06 22:59:49,522 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 432 predicate places. [2023-11-06 22:59:49,522 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 434 transitions, 8104 flow [2023-11-06 22:59:49,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 68.0909090909091) internal successors, (2996), 44 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:49,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:49,523 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:49,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:49,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:49,733 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 22:59:49,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:49,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2113962641, now seen corresponding path program 13 times [2023-11-06 22:59:49,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:49,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470440447] [2023-11-06 22:59:49,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:49,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:51,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:51,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470440447] [2023-11-06 22:59:51,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470440447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:51,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596141099] [2023-11-06 22:59:51,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:59:51,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:51,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:51,154 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:51,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:59:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:51,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 22:59:51,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:51,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:51,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596141099] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:51,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:51,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2023-11-06 22:59:51,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363861167] [2023-11-06 22:59:51,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:51,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-06 22:59:51,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:51,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-06 22:59:51,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1530, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 22:59:51,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 22:59:51,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 434 transitions, 8104 flow. Second operand has 45 states, 45 states have (on average 68.11111111111111) internal successors, (3065), 45 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:51,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:51,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 22:59:51,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:55,467 INFO L124 PetriNetUnfolderBase]: 1996/3691 cut-off events. [2023-11-06 22:59:55,467 INFO L125 PetriNetUnfolderBase]: For 2079865/2079865 co-relation queries the response was YES. [2023-11-06 22:59:55,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78520 conditions, 3691 events. 1996/3691 cut-off events. For 2079865/2079865 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 18924 event pairs, 510 based on Foata normal form. 8/3699 useless extension candidates. Maximal degree in co-relation 78346. Up to 2205 conditions per place. [2023-11-06 22:59:55,564 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 374 selfloop transitions, 186 changer transitions 93/653 dead transitions. [2023-11-06 22:59:55,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 653 transitions, 18113 flow [2023-11-06 22:59:55,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-06 22:59:55,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-06 22:59:55,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3497 transitions. [2023-11-06 22:59:55,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273493828669192 [2023-11-06 22:59:55,572 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3497 transitions. [2023-11-06 22:59:55,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3497 transitions. [2023-11-06 22:59:55,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:55,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3497 transitions. [2023-11-06 22:59:55,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 71.36734693877551) internal successors, (3497), 49 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:55,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 167.0) internal successors, (8350), 50 states have internal predecessors, (8350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:55,588 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 167.0) internal successors, (8350), 50 states have internal predecessors, (8350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:55,589 INFO L175 Difference]: Start difference. First operand has 456 places, 434 transitions, 8104 flow. Second operand 49 states and 3497 transitions. [2023-11-06 22:59:55,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 653 transitions, 18113 flow [2023-11-06 23:00:01,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 653 transitions, 17724 flow, removed 153 selfloop flow, removed 17 redundant places. [2023-11-06 23:00:01,680 INFO L231 Difference]: Finished difference. Result has 522 places, 506 transitions, 10266 flow [2023-11-06 23:00:01,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=7715, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=10266, PETRI_PLACES=522, PETRI_TRANSITIONS=506} [2023-11-06 23:00:01,681 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 498 predicate places. [2023-11-06 23:00:01,681 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 506 transitions, 10266 flow [2023-11-06 23:00:01,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 68.11111111111111) internal successors, (3065), 45 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:01,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:01,682 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:01,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:01,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:01,882 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 23:00:01,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:01,883 INFO L85 PathProgramCache]: Analyzing trace with hash 699309177, now seen corresponding path program 14 times [2023-11-06 23:00:01,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:01,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053564575] [2023-11-06 23:00:01,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:01,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:03,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:03,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053564575] [2023-11-06 23:00:03,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053564575] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:03,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494277716] [2023-11-06 23:00:03,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:00:03,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:03,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:03,254 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:03,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:00:03,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:00:03,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:03,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:00:03,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:03,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:03,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494277716] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:03,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:03,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-11-06 23:00:03,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177643434] [2023-11-06 23:00:03,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:03,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 23:00:03,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:03,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 23:00:03,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=1462, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 23:00:04,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 23:00:04,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 506 transitions, 10266 flow. Second operand has 44 states, 44 states have (on average 68.0909090909091) internal successors, (2996), 44 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:04,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:04,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 23:00:04,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:08,009 INFO L124 PetriNetUnfolderBase]: 2188/4075 cut-off events. [2023-11-06 23:00:08,010 INFO L125 PetriNetUnfolderBase]: For 2418592/2418592 co-relation queries the response was YES. [2023-11-06 23:00:08,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89489 conditions, 4075 events. 2188/4075 cut-off events. For 2418592/2418592 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 21376 event pairs, 448 based on Foata normal form. 8/4083 useless extension candidates. Maximal degree in co-relation 89279. Up to 1945 conditions per place. [2023-11-06 23:00:08,089 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 340 selfloop transitions, 265 changer transitions 91/696 dead transitions. [2023-11-06 23:00:08,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 696 transitions, 20097 flow [2023-11-06 23:00:08,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 23:00:08,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-06 23:00:08,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3422 transitions. [2023-11-06 23:00:08,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268962075848303 [2023-11-06 23:00:08,095 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3422 transitions. [2023-11-06 23:00:08,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3422 transitions. [2023-11-06 23:00:08,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:08,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3422 transitions. [2023-11-06 23:00:08,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 71.29166666666667) internal successors, (3422), 48 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:08,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 167.0) internal successors, (8183), 49 states have internal predecessors, (8183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:08,112 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 167.0) internal successors, (8183), 49 states have internal predecessors, (8183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:08,112 INFO L175 Difference]: Start difference. First operand has 522 places, 506 transitions, 10266 flow. Second operand 48 states and 3422 transitions. [2023-11-06 23:00:08,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 696 transitions, 20097 flow [2023-11-06 23:00:14,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 696 transitions, 19481 flow, removed 287 selfloop flow, removed 8 redundant places. [2023-11-06 23:00:14,780 INFO L231 Difference]: Finished difference. Result has 581 places, 554 transitions, 11773 flow [2023-11-06 23:00:14,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=9740, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=11773, PETRI_PLACES=581, PETRI_TRANSITIONS=554} [2023-11-06 23:00:14,782 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 557 predicate places. [2023-11-06 23:00:14,782 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 554 transitions, 11773 flow [2023-11-06 23:00:14,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 68.0909090909091) internal successors, (2996), 44 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:14,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:14,783 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:14,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:14,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:14,988 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 23:00:14,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:14,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1231787973, now seen corresponding path program 15 times [2023-11-06 23:00:14,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:14,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11063111] [2023-11-06 23:00:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:14,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:16,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:16,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11063111] [2023-11-06 23:00:16,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11063111] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:16,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716016735] [2023-11-06 23:00:16,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:00:16,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:16,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:16,245 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:16,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:00:16,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2023-11-06 23:00:16,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:16,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:00:16,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:16,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:16,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716016735] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:16,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:16,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2023-11-06 23:00:16,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686961474] [2023-11-06 23:00:16,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:16,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-06 23:00:16,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:16,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-06 23:00:16,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1565, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 23:00:17,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 23:00:17,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 554 transitions, 11773 flow. Second operand has 45 states, 45 states have (on average 68.11111111111111) internal successors, (3065), 45 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:17,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:17,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 23:00:17,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:21,783 INFO L124 PetriNetUnfolderBase]: 2472/4643 cut-off events. [2023-11-06 23:00:21,783 INFO L125 PetriNetUnfolderBase]: For 2816131/2816131 co-relation queries the response was YES. [2023-11-06 23:00:21,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104027 conditions, 4643 events. 2472/4643 cut-off events. For 2816131/2816131 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 25334 event pairs, 420 based on Foata normal form. 8/4651 useless extension candidates. Maximal degree in co-relation 103796. Up to 2071 conditions per place. [2023-11-06 23:00:21,895 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 332 selfloop transitions, 350 changer transitions 97/779 dead transitions. [2023-11-06 23:00:21,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 779 transitions, 22671 flow [2023-11-06 23:00:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-06 23:00:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-06 23:00:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3641 transitions. [2023-11-06 23:00:21,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274979452858988 [2023-11-06 23:00:21,901 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3641 transitions. [2023-11-06 23:00:21,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3641 transitions. [2023-11-06 23:00:21,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:21,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3641 transitions. [2023-11-06 23:00:21,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 71.3921568627451) internal successors, (3641), 51 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:21,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 167.0) internal successors, (8684), 52 states have internal predecessors, (8684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:21,919 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 167.0) internal successors, (8684), 52 states have internal predecessors, (8684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:21,920 INFO L175 Difference]: Start difference. First operand has 581 places, 554 transitions, 11773 flow. Second operand 51 states and 3641 transitions. [2023-11-06 23:00:21,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 779 transitions, 22671 flow [2023-11-06 23:00:29,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 622 places, 779 transitions, 21899 flow, removed 347 selfloop flow, removed 9 redundant places. [2023-11-06 23:00:29,695 INFO L231 Difference]: Finished difference. Result has 655 places, 627 transitions, 14451 flow [2023-11-06 23:00:29,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=11295, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=14451, PETRI_PLACES=655, PETRI_TRANSITIONS=627} [2023-11-06 23:00:29,696 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 631 predicate places. [2023-11-06 23:00:29,697 INFO L495 AbstractCegarLoop]: Abstraction has has 655 places, 627 transitions, 14451 flow [2023-11-06 23:00:29,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 68.11111111111111) internal successors, (3065), 45 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:29,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:29,697 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:29,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:29,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:29,898 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 23:00:29,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:29,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1673070543, now seen corresponding path program 16 times [2023-11-06 23:00:29,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:29,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692876544] [2023-11-06 23:00:29,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:29,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:31,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:31,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692876544] [2023-11-06 23:00:31,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692876544] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:31,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960468836] [2023-11-06 23:00:31,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:00:31,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:31,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:31,109 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:31,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:00:31,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:00:31,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:31,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:00:31,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:31,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:31,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960468836] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:31,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:31,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-11-06 23:00:31,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825130810] [2023-11-06 23:00:31,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:31,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 23:00:31,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:31,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 23:00:31,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=1494, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 23:00:31,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 23:00:31,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 655 places, 627 transitions, 14451 flow. Second operand has 44 states, 44 states have (on average 68.0909090909091) internal successors, (2996), 44 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:31,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:31,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 23:00:31,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:36,691 INFO L124 PetriNetUnfolderBase]: 2568/4835 cut-off events. [2023-11-06 23:00:36,691 INFO L125 PetriNetUnfolderBase]: For 2910623/2910623 co-relation queries the response was YES. [2023-11-06 23:00:36,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109021 conditions, 4835 events. 2568/4835 cut-off events. For 2910623/2910623 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 26590 event pairs, 324 based on Foata normal form. 8/4843 useless extension candidates. Maximal degree in co-relation 108756. Up to 2167 conditions per place. [2023-11-06 23:00:36,807 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 278 selfloop transitions, 425 changer transitions 95/798 dead transitions. [2023-11-06 23:00:36,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 798 transitions, 24262 flow [2023-11-06 23:00:36,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-06 23:00:36,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-11-06 23:00:36,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3566 transitions. [2023-11-06 23:00:36,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42706586826347304 [2023-11-06 23:00:36,814 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3566 transitions. [2023-11-06 23:00:36,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3566 transitions. [2023-11-06 23:00:36,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:36,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3566 transitions. [2023-11-06 23:00:36,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 71.32) internal successors, (3566), 50 states have internal predecessors, (3566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 167.0) internal successors, (8517), 51 states have internal predecessors, (8517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,831 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 167.0) internal successors, (8517), 51 states have internal predecessors, (8517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,831 INFO L175 Difference]: Start difference. First operand has 655 places, 627 transitions, 14451 flow. Second operand 50 states and 3566 transitions. [2023-11-06 23:00:36,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 798 transitions, 24262 flow [2023-11-06 23:00:45,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 693 places, 798 transitions, 23549 flow, removed 315 selfloop flow, removed 11 redundant places. [2023-11-06 23:00:45,483 INFO L231 Difference]: Finished difference. Result has 701 places, 651 transitions, 15517 flow [2023-11-06 23:00:45,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=13830, PETRI_DIFFERENCE_MINUEND_PLACES=644, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=409, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=15517, PETRI_PLACES=701, PETRI_TRANSITIONS=651} [2023-11-06 23:00:45,485 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 677 predicate places. [2023-11-06 23:00:45,485 INFO L495 AbstractCegarLoop]: Abstraction has has 701 places, 651 transitions, 15517 flow [2023-11-06 23:00:45,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 68.0909090909091) internal successors, (2996), 44 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:45,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:45,486 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:45,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:45,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 23:00:45,689 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 23:00:45,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:45,689 INFO L85 PathProgramCache]: Analyzing trace with hash -190427237, now seen corresponding path program 17 times [2023-11-06 23:00:45,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:45,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914257946] [2023-11-06 23:00:45,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:45,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:46,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:46,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914257946] [2023-11-06 23:00:46,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914257946] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:46,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74883777] [2023-11-06 23:00:46,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:00:46,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:46,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:46,878 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:46,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:00:47,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-11-06 23:00:47,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:47,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:00:47,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:47,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:47,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74883777] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:47,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:47,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2023-11-06 23:00:47,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973263068] [2023-11-06 23:00:47,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:47,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-06 23:00:47,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:47,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-06 23:00:47,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1596, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 23:00:47,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 23:00:47,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 701 places, 651 transitions, 15517 flow. Second operand has 45 states, 45 states have (on average 68.11111111111111) internal successors, (3065), 45 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:47,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:47,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 23:00:47,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:53,684 INFO L124 PetriNetUnfolderBase]: 2848/5395 cut-off events. [2023-11-06 23:00:53,684 INFO L125 PetriNetUnfolderBase]: For 3321208/3321208 co-relation queries the response was YES. [2023-11-06 23:00:53,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123389 conditions, 5395 events. 2848/5395 cut-off events. For 3321208/3321208 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 30616 event pairs, 306 based on Foata normal form. 8/5403 useless extension candidates. Maximal degree in co-relation 123115. Up to 2443 conditions per place. [2023-11-06 23:00:53,834 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 276 selfloop transitions, 503 changer transitions 101/880 dead transitions. [2023-11-06 23:00:53,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 753 places, 880 transitions, 26751 flow [2023-11-06 23:00:53,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-06 23:00:53,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-11-06 23:00:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3785 transitions. [2023-11-06 23:00:53,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42763529544684215 [2023-11-06 23:00:53,840 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3785 transitions. [2023-11-06 23:00:53,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3785 transitions. [2023-11-06 23:00:53,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:53,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3785 transitions. [2023-11-06 23:00:53,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 71.41509433962264) internal successors, (3785), 53 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:53,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 167.0) internal successors, (9018), 54 states have internal predecessors, (9018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:53,858 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 167.0) internal successors, (9018), 54 states have internal predecessors, (9018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:53,859 INFO L175 Difference]: Start difference. First operand has 701 places, 651 transitions, 15517 flow. Second operand 53 states and 3785 transitions. [2023-11-06 23:00:53,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 753 places, 880 transitions, 26751 flow [2023-11-06 23:01:05,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 732 places, 880 transitions, 25906 flow, removed 275 selfloop flow, removed 21 redundant places. [2023-11-06 23:01:05,488 INFO L231 Difference]: Finished difference. Result has 763 places, 722 transitions, 18397 flow [2023-11-06 23:01:05,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=14872, PETRI_DIFFERENCE_MINUEND_PLACES=680, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=18397, PETRI_PLACES=763, PETRI_TRANSITIONS=722} [2023-11-06 23:01:05,489 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 739 predicate places. [2023-11-06 23:01:05,489 INFO L495 AbstractCegarLoop]: Abstraction has has 763 places, 722 transitions, 18397 flow [2023-11-06 23:01:05,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 68.11111111111111) internal successors, (3065), 45 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:05,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:05,490 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:05,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:05,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:05,690 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 23:01:05,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:05,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2030939995, now seen corresponding path program 18 times [2023-11-06 23:01:05,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:05,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986194876] [2023-11-06 23:01:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:05,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:06,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:06,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986194876] [2023-11-06 23:01:06,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986194876] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:06,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754096131] [2023-11-06 23:01:06,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:01:06,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:06,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:06,901 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:06,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 23:01:07,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2023-11-06 23:01:07,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:01:07,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:01:07,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:07,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:07,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754096131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:01:07,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:01:07,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-11-06 23:01:07,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557793395] [2023-11-06 23:01:07,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:01:07,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 23:01:07,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:07,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 23:01:07,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1522, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 23:01:07,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 23:01:07,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 763 places, 722 transitions, 18397 flow. Second operand has 44 states, 44 states have (on average 68.0909090909091) internal successors, (2996), 44 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:07,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:07,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 23:01:07,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:14,091 INFO L124 PetriNetUnfolderBase]: 3120/5939 cut-off events. [2023-11-06 23:01:14,091 INFO L125 PetriNetUnfolderBase]: For 3688418/3688418 co-relation queries the response was YES. [2023-11-06 23:01:14,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137715 conditions, 5939 events. 3120/5939 cut-off events. For 3688418/3688418 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 34752 event pairs, 300 based on Foata normal form. 8/5947 useless extension candidates. Maximal degree in co-relation 137409. Up to 2715 conditions per place. [2023-11-06 23:01:14,298 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 270 selfloop transitions, 575 changer transitions 99/944 dead transitions. [2023-11-06 23:01:14,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 814 places, 944 transitions, 29965 flow [2023-11-06 23:01:14,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-06 23:01:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-06 23:01:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3710 transitions. [2023-11-06 23:01:14,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4272224781206817 [2023-11-06 23:01:14,302 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3710 transitions. [2023-11-06 23:01:14,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3710 transitions. [2023-11-06 23:01:14,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:14,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3710 transitions. [2023-11-06 23:01:14,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 71.34615384615384) internal successors, (3710), 52 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:14,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 167.0) internal successors, (8851), 53 states have internal predecessors, (8851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:14,318 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 167.0) internal successors, (8851), 53 states have internal predecessors, (8851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:14,318 INFO L175 Difference]: Start difference. First operand has 763 places, 722 transitions, 18397 flow. Second operand 52 states and 3710 transitions. [2023-11-06 23:01:14,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 814 places, 944 transitions, 29965 flow [2023-11-06 23:01:29,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 798 places, 944 transitions, 29206 flow, removed 298 selfloop flow, removed 16 redundant places. [2023-11-06 23:01:29,992 INFO L231 Difference]: Finished difference. Result has 828 places, 791 transitions, 21557 flow [2023-11-06 23:01:29,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=17734, PETRI_DIFFERENCE_MINUEND_PLACES=747, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=514, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=21557, PETRI_PLACES=828, PETRI_TRANSITIONS=791} [2023-11-06 23:01:29,994 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 804 predicate places. [2023-11-06 23:01:29,994 INFO L495 AbstractCegarLoop]: Abstraction has has 828 places, 791 transitions, 21557 flow [2023-11-06 23:01:29,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 68.0909090909091) internal successors, (2996), 44 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:29,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:29,995 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:30,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:30,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:30,208 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 23:01:30,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:30,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1715927823, now seen corresponding path program 19 times [2023-11-06 23:01:30,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:30,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506214385] [2023-11-06 23:01:30,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:30,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:31,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:31,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506214385] [2023-11-06 23:01:31,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506214385] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:31,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307147123] [2023-11-06 23:01:31,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:01:31,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:31,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:31,345 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:31,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 23:01:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:31,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:01:31,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:31,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:31,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307147123] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:01:31,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:01:31,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2023-11-06 23:01:31,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142835726] [2023-11-06 23:01:31,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:01:31,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-06 23:01:31,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:31,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-06 23:01:31,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1623, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 23:01:32,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 23:01:32,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 828 places, 791 transitions, 21557 flow. Second operand has 45 states, 45 states have (on average 68.11111111111111) internal successors, (3065), 45 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:32,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:32,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 23:01:32,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:39,956 INFO L124 PetriNetUnfolderBase]: 3384/6467 cut-off events. [2023-11-06 23:01:39,956 INFO L125 PetriNetUnfolderBase]: For 4137808/4137808 co-relation queries the response was YES. [2023-11-06 23:01:40,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153301 conditions, 6467 events. 3384/6467 cut-off events. For 4137808/4137808 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 39032 event pairs, 282 based on Foata normal form. 8/6475 useless extension candidates. Maximal degree in co-relation 152964. Up to 2971 conditions per place. [2023-11-06 23:01:40,234 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 266 selfloop transitions, 651 changer transitions 105/1022 dead transitions. [2023-11-06 23:01:40,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 882 places, 1022 transitions, 33589 flow [2023-11-06 23:01:40,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-06 23:01:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-11-06 23:01:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3929 transitions. [2023-11-06 23:01:40,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4277626565051715 [2023-11-06 23:01:40,240 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3929 transitions. [2023-11-06 23:01:40,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3929 transitions. [2023-11-06 23:01:40,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:40,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3929 transitions. [2023-11-06 23:01:40,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 71.43636363636364) internal successors, (3929), 55 states have internal predecessors, (3929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:40,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 167.0) internal successors, (9352), 56 states have internal predecessors, (9352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:40,258 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 167.0) internal successors, (9352), 56 states have internal predecessors, (9352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:40,258 INFO L175 Difference]: Start difference. First operand has 828 places, 791 transitions, 21557 flow. Second operand 55 states and 3929 transitions. [2023-11-06 23:01:40,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 882 places, 1022 transitions, 33589 flow [2023-11-06 23:02:00,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 866 places, 1022 transitions, 32544 flow, removed 420 selfloop flow, removed 16 redundant places. [2023-11-06 23:02:00,527 INFO L231 Difference]: Finished difference. Result has 895 places, 858 transitions, 24753 flow [2023-11-06 23:02:00,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=20748, PETRI_DIFFERENCE_MINUEND_PLACES=812, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=592, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=24753, PETRI_PLACES=895, PETRI_TRANSITIONS=858} [2023-11-06 23:02:00,528 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 871 predicate places. [2023-11-06 23:02:00,528 INFO L495 AbstractCegarLoop]: Abstraction has has 895 places, 858 transitions, 24753 flow [2023-11-06 23:02:00,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 68.11111111111111) internal successors, (3065), 45 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:00,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:00,529 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:00,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:00,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:00,729 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 23:02:00,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:00,730 INFO L85 PathProgramCache]: Analyzing trace with hash 30340685, now seen corresponding path program 20 times [2023-11-06 23:02:00,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:00,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936562937] [2023-11-06 23:02:00,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:00,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:01,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:01,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936562937] [2023-11-06 23:02:01,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936562937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:01,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726629487] [2023-11-06 23:02:01,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:02:01,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:01,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:01,944 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:01,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63fe3a87-d898-4408-828b-7873982b729a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 23:02:02,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:02:02,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:02,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:02:02,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:02,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:02,513 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:02,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726629487] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:02,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:02,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2023-11-06 23:02:02,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339970515] [2023-11-06 23:02:02,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:02,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-06 23:02:02,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:02,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-06 23:02:02,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 23:02:02,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 167 [2023-11-06 23:02:02,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 895 places, 858 transitions, 24753 flow. Second operand has 45 states, 45 states have (on average 68.11111111111111) internal successors, (3065), 45 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:02,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:02,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 167 [2023-11-06 23:02:02,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:11,148 INFO L124 PetriNetUnfolderBase]: 3632/6963 cut-off events. [2023-11-06 23:02:11,148 INFO L125 PetriNetUnfolderBase]: For 4537340/4537340 co-relation queries the response was YES. [2023-11-06 23:02:11,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167533 conditions, 6963 events. 3632/6963 cut-off events. For 4537340/4537340 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 42943 event pairs, 260 based on Foata normal form. 8/6971 useless extension candidates. Maximal degree in co-relation 167166. Up to 3211 conditions per place. [2023-11-06 23:02:11,567 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 257 selfloop transitions, 725 changer transitions 109/1091 dead transitions. [2023-11-06 23:02:11,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 951 places, 1091 transitions, 37210 flow [2023-11-06 23:02:11,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-06 23:02:11,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-11-06 23:02:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 4073 transitions. [2023-11-06 23:02:11,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278810799453724 [2023-11-06 23:02:11,574 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 4073 transitions. [2023-11-06 23:02:11,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 4073 transitions. [2023-11-06 23:02:11,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:11,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 4073 transitions. [2023-11-06 23:02:11,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 71.45614035087719) internal successors, (4073), 57 states have internal predecessors, (4073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:11,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 167.0) internal successors, (9686), 58 states have internal predecessors, (9686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:11,591 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 167.0) internal successors, (9686), 58 states have internal predecessors, (9686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:11,591 INFO L175 Difference]: Start difference. First operand has 895 places, 858 transitions, 24753 flow. Second operand 57 states and 4073 transitions. [2023-11-06 23:02:11,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 951 places, 1091 transitions, 37210 flow