./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/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_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/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_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/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 0d10bf8c0e842192a13f4b6638f03cf57668d5bee07d0b49c4b595de1c605066 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:08:24,742 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:08:24,871 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 23:08:24,879 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:08:24,880 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:08:24,919 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:08:24,919 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:08:24,920 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:08:24,921 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:08:24,926 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:08:24,928 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:08:24,928 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:08:24,929 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:08:24,930 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:08:24,931 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:08:24,931 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:08:24,932 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:08:24,932 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:08:24,933 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 23:08:24,933 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 23:08:24,933 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 23:08:24,934 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:08:24,935 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 23:08:24,935 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:08:24,936 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:08:24,936 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:08:24,937 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:08:24,937 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:08:24,938 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:08:24,938 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:08:24,940 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:08:24,940 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:08:24,940 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:08:24,941 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:08:24,941 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:08:24,941 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:08:24,941 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:08:24,942 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:08:24,942 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_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d10bf8c0e842192a13f4b6638f03cf57668d5bee07d0b49c4b595de1c605066 [2023-11-06 23:08:25,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:08:25,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:08:25,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:08:25,281 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:08:25,282 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:08:25,284 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c [2023-11-06 23:08:28,373 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:08:28,648 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:08:28,649 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c [2023-11-06 23:08:28,657 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/data/a9a4296ac/b8234b91d3f646ffb1697391a8d55e6d/FLAGee0b8b331 [2023-11-06 23:08:28,683 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/data/a9a4296ac/b8234b91d3f646ffb1697391a8d55e6d [2023-11-06 23:08:28,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:08:28,692 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:08:28,696 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:08:28,696 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:08:28,702 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:08:28,704 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:08:28" (1/1) ... [2023-11-06 23:08:28,705 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d0e365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:28, skipping insertion in model container [2023-11-06 23:08:28,705 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:08:28" (1/1) ... [2023-11-06 23:08:28,739 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:08:28,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:08:28,950 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:08:28,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:08:28,990 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:08:28,991 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:28 WrapperNode [2023-11-06 23:08:28,991 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:08:28,992 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:08:28,992 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:08:28,992 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:08:29,000 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:28" (1/1) ... [2023-11-06 23:08:29,009 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:28" (1/1) ... [2023-11-06 23:08:29,042 INFO L138 Inliner]: procedures = 22, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-11-06 23:08:29,042 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:08:29,043 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:08:29,045 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:08:29,045 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:08:29,055 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:28" (1/1) ... [2023-11-06 23:08:29,055 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:28" (1/1) ... [2023-11-06 23:08:29,063 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:28" (1/1) ... [2023-11-06 23:08:29,064 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:28" (1/1) ... [2023-11-06 23:08:29,082 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:28" (1/1) ... [2023-11-06 23:08:29,094 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:28" (1/1) ... [2023-11-06 23:08:29,096 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:28" (1/1) ... [2023-11-06 23:08:29,097 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:28" (1/1) ... [2023-11-06 23:08:29,108 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:08:29,109 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:08:29,109 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:08:29,109 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:08:29,110 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:28" (1/1) ... [2023-11-06 23:08:29,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:08:29,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:29,152 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:08:29,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:08:29,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:08:29,198 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:08:29,203 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:08:29,203 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:08:29,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:08:29,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 23:08:29,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 23:08:29,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:08:29,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:08:29,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:08:29,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:08:29,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:08:29,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:08:29,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:08:29,207 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 23:08:29,352 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:08:29,354 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:08:29,704 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:08:29,713 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:08:29,713 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 23:08:29,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:08:29 BoogieIcfgContainer [2023-11-06 23:08:29,716 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:08:29,719 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:08:29,720 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:08:29,724 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:08:29,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:08:28" (1/3) ... [2023-11-06 23:08:29,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d88ae1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:08:29, skipping insertion in model container [2023-11-06 23:08:29,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:28" (2/3) ... [2023-11-06 23:08:29,726 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d88ae1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:08:29, skipping insertion in model container [2023-11-06 23:08:29,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:08:29" (3/3) ... [2023-11-06 23:08:29,728 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.c [2023-11-06 23:08:29,748 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:08:29,748 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-11-06 23:08:29,748 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:08:29,846 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 23:08:29,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 128 transitions, 277 flow [2023-11-06 23:08:30,000 INFO L124 PetriNetUnfolderBase]: 7/125 cut-off events. [2023-11-06 23:08:30,003 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:08:30,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 125 events. 7/125 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 126 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-11-06 23:08:30,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 128 transitions, 277 flow [2023-11-06 23:08:30,025 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 120 transitions, 258 flow [2023-11-06 23:08:30,029 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:08:30,039 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 120 transitions, 258 flow [2023-11-06 23:08:30,043 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 120 transitions, 258 flow [2023-11-06 23:08:30,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 120 transitions, 258 flow [2023-11-06 23:08:30,111 INFO L124 PetriNetUnfolderBase]: 7/120 cut-off events. [2023-11-06 23:08:30,112 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:08:30,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 120 events. 7/120 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 127 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-11-06 23:08:30,116 INFO L119 LiptonReduction]: Number of co-enabled transitions 1914 [2023-11-06 23:08:34,651 INFO L134 LiptonReduction]: Checked pairs total: 1828 [2023-11-06 23:08:34,652 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-11-06 23:08:34,668 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:08:34,676 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;@c9d3456, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:08:34,676 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-11-06 23:08:34,679 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:08:34,679 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-06 23:08:34,679 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:08:34,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:34,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 23:08:34,681 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:34,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:34,686 INFO L85 PathProgramCache]: Analyzing trace with hash 468, now seen corresponding path program 1 times [2023-11-06 23:08:34,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:34,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762717282] [2023-11-06 23:08:34,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:34,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:34,806 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 23:08:34,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:34,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762717282] [2023-11-06 23:08:34,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762717282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:34,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:34,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 23:08:34,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758876318] [2023-11-06 23:08:34,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:34,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:08:34,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:34,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:08:34,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:08:34,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 240 [2023-11-06 23:08:34,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 88 flow. Second operand has 2 states, 2 states have (on average 117.5) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states 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 23:08:34,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:34,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 240 [2023-11-06 23:08:34,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:35,020 INFO L124 PetriNetUnfolderBase]: 578/785 cut-off events. [2023-11-06 23:08:35,021 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-06 23:08:35,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1605 conditions, 785 events. 578/785 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2742 event pairs, 263 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 1257. Up to 777 conditions per place. [2023-11-06 23:08:35,032 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 29 selfloop transitions, 0 changer transitions 0/32 dead transitions. [2023-11-06 23:08:35,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 32 transitions, 140 flow [2023-11-06 23:08:35,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:08:35,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 23:08:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 266 transitions. [2023-11-06 23:08:35,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2023-11-06 23:08:35,049 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 266 transitions. [2023-11-06 23:08:35,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 266 transitions. [2023-11-06 23:08:35,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:35,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 266 transitions. [2023-11-06 23:08:35,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 133.0) internal successors, (266), 2 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 23:08:35,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states 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 23:08:35,065 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states 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 23:08:35,067 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 88 flow. Second operand 2 states and 266 transitions. [2023-11-06 23:08:35,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 32 transitions, 140 flow [2023-11-06 23:08:35,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 128 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 23:08:35,074 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 70 flow [2023-11-06 23:08:35,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=70, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2023-11-06 23:08:35,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -8 predicate places. [2023-11-06 23:08:35,081 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 70 flow [2023-11-06 23:08:35,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 117.5) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states 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 23:08:35,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:35,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:08:35,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:08:35,083 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:35,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:35,084 INFO L85 PathProgramCache]: Analyzing trace with hash 458162, now seen corresponding path program 1 times [2023-11-06 23:08:35,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:35,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175233200] [2023-11-06 23:08:35,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:35,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:35,449 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 23:08:35,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:35,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175233200] [2023-11-06 23:08:35,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175233200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:35,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:35,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:08:35,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75235769] [2023-11-06 23:08:35,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:35,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:08:35,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:35,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:08:35,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:08:35,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 240 [2023-11-06 23:08:35,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 23:08:35,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:35,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 240 [2023-11-06 23:08:35,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:35,665 INFO L124 PetriNetUnfolderBase]: 551/746 cut-off events. [2023-11-06 23:08:35,666 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:08:35,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1499 conditions, 746 events. 551/746 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2585 event pairs, 250 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 1496. Up to 737 conditions per place. [2023-11-06 23:08:35,676 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 26 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-11-06 23:08:35,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 30 transitions, 120 flow [2023-11-06 23:08:35,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:35,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2023-11-06 23:08:35,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027777777777778 [2023-11-06 23:08:35,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 362 transitions. [2023-11-06 23:08:35,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 362 transitions. [2023-11-06 23:08:35,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:35,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 362 transitions. [2023-11-06 23:08:35,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 23:08:35,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 23:08:35,695 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 23:08:35,696 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 70 flow. Second operand 3 states and 362 transitions. [2023-11-06 23:08:35,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 30 transitions, 120 flow [2023-11-06 23:08:35,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:08:35,699 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 68 flow [2023-11-06 23:08:35,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-11-06 23:08:35,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -8 predicate places. [2023-11-06 23:08:35,703 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 68 flow [2023-11-06 23:08:35,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 23:08:35,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:35,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:08:35,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:08:35,706 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:35,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:35,714 INFO L85 PathProgramCache]: Analyzing trace with hash 458160, now seen corresponding path program 1 times [2023-11-06 23:08:35,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:35,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555596091] [2023-11-06 23:08:35,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:35,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:35,793 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 23:08:35,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:35,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555596091] [2023-11-06 23:08:35,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555596091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:35,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:35,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:08:35,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712704164] [2023-11-06 23:08:35,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:35,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:08:35,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:35,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:08:35,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:08:35,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 240 [2023-11-06 23:08:35,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:35,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:35,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 240 [2023-11-06 23:08:35,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:35,973 INFO L124 PetriNetUnfolderBase]: 524/707 cut-off events. [2023-11-06 23:08:35,973 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:08:35,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1423 conditions, 707 events. 524/707 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2415 event pairs, 237 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 1419. Up to 698 conditions per place. [2023-11-06 23:08:35,980 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 24 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-11-06 23:08:35,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 114 flow [2023-11-06 23:08:35,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:35,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:35,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2023-11-06 23:08:35,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2023-11-06 23:08:35,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2023-11-06 23:08:35,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2023-11-06 23:08:35,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:35,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2023-11-06 23:08:35,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 23:08:35,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 23:08:35,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 23:08:35,987 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 68 flow. Second operand 3 states and 345 transitions. [2023-11-06 23:08:35,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 114 flow [2023-11-06 23:08:35,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:35,989 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 65 flow [2023-11-06 23:08:35,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-11-06 23:08:35,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -9 predicate places. [2023-11-06 23:08:35,990 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 65 flow [2023-11-06 23:08:35,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:35,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:35,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:08:35,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:08:35,992 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:35,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:35,992 INFO L85 PathProgramCache]: Analyzing trace with hash 440302998, now seen corresponding path program 1 times [2023-11-06 23:08:35,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:35,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172077688] [2023-11-06 23:08:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:35,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:36,047 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 23:08:36,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:36,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172077688] [2023-11-06 23:08:36,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172077688] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:36,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:36,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:08:36,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923904696] [2023-11-06 23:08:36,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:36,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:08:36,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:36,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:08:36,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:08:36,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 240 [2023-11-06 23:08:36,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states 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 23:08:36,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:36,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 240 [2023-11-06 23:08:36,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:36,209 INFO L124 PetriNetUnfolderBase]: 498/669 cut-off events. [2023-11-06 23:08:36,210 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:08:36,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1348 conditions, 669 events. 498/669 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2237 event pairs, 225 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 1344. Up to 660 conditions per place. [2023-11-06 23:08:36,216 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 22 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-11-06 23:08:36,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 26 transitions, 107 flow [2023-11-06 23:08:36,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:36,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 343 transitions. [2023-11-06 23:08:36,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47638888888888886 [2023-11-06 23:08:36,219 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 343 transitions. [2023-11-06 23:08:36,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 343 transitions. [2023-11-06 23:08:36,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:36,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 343 transitions. [2023-11-06 23:08:36,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 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 23:08:36,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 23:08:36,223 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 23:08:36,224 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 65 flow. Second operand 3 states and 343 transitions. [2023-11-06 23:08:36,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 26 transitions, 107 flow [2023-11-06 23:08:36,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 106 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:36,225 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 62 flow [2023-11-06 23:08:36,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-11-06 23:08:36,226 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -10 predicate places. [2023-11-06 23:08:36,227 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 62 flow [2023-11-06 23:08:36,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states 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 23:08:36,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:36,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:08:36,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:08:36,228 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:36,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:36,228 INFO L85 PathProgramCache]: Analyzing trace with hash 440302999, now seen corresponding path program 1 times [2023-11-06 23:08:36,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:36,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432973536] [2023-11-06 23:08:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:36,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:36,287 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 23:08:36,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:36,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432973536] [2023-11-06 23:08:36,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432973536] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:36,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:36,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:08:36,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335655317] [2023-11-06 23:08:36,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:36,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:08:36,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:36,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:08:36,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:08:36,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 240 [2023-11-06 23:08:36,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states 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 23:08:36,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:36,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 240 [2023-11-06 23:08:36,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:36,430 INFO L124 PetriNetUnfolderBase]: 472/631 cut-off events. [2023-11-06 23:08:36,430 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:08:36,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1273 conditions, 631 events. 472/631 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2088 event pairs, 213 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 1269. Up to 622 conditions per place. [2023-11-06 23:08:36,436 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 20 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-11-06 23:08:36,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 24 transitions, 100 flow [2023-11-06 23:08:36,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:36,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2023-11-06 23:08:36,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2023-11-06 23:08:36,439 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2023-11-06 23:08:36,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2023-11-06 23:08:36,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:36,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2023-11-06 23:08:36,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states 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 23:08:36,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 23:08:36,445 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 23:08:36,445 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 62 flow. Second operand 3 states and 356 transitions. [2023-11-06 23:08:36,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 24 transitions, 100 flow [2023-11-06 23:08:36,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:36,447 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 59 flow [2023-11-06 23:08:36,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-11-06 23:08:36,448 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -11 predicate places. [2023-11-06 23:08:36,448 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 59 flow [2023-11-06 23:08:36,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states 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 23:08:36,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:36,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:36,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:08:36,449 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:36,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:36,450 INFO L85 PathProgramCache]: Analyzing trace with hash -2070568922, now seen corresponding path program 1 times [2023-11-06 23:08:36,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:36,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431923358] [2023-11-06 23:08:36,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:36,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:36,598 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 23:08:36,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:36,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431923358] [2023-11-06 23:08:36,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431923358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:36,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:36,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:08:36,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322177132] [2023-11-06 23:08:36,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:36,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:08:36,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:36,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:08:36,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:08:36,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 240 [2023-11-06 23:08:36,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 59 flow. Second operand has 4 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 23:08:36,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:36,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 240 [2023-11-06 23:08:36,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:36,781 INFO L124 PetriNetUnfolderBase]: 370/502 cut-off events. [2023-11-06 23:08:36,782 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:08:36,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 502 events. 370/502 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1574 event pairs, 165 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 1012. Up to 493 conditions per place. [2023-11-06 23:08:36,786 INFO L140 encePairwiseOnDemand]: 238/240 looper letters, 19 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-11-06 23:08:36,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 23 transitions, 97 flow [2023-11-06 23:08:36,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:36,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-11-06 23:08:36,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2023-11-06 23:08:36,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-11-06 23:08:36,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-11-06 23:08:36,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:36,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-11-06 23:08:36,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states 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 23:08:36,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 23:08:36,793 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 23:08:36,794 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 59 flow. Second operand 3 states and 348 transitions. [2023-11-06 23:08:36,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 23 transitions, 97 flow [2023-11-06 23:08:36,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 23 transitions, 96 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:36,795 INFO L231 Difference]: Finished difference. Result has 31 places, 23 transitions, 58 flow [2023-11-06 23:08:36,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=31, PETRI_TRANSITIONS=23} [2023-11-06 23:08:36,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -11 predicate places. [2023-11-06 23:08:36,801 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 23 transitions, 58 flow [2023-11-06 23:08:36,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 23:08:36,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:36,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:36,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 23:08:36,803 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:36,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:36,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2070568923, now seen corresponding path program 1 times [2023-11-06 23:08:36,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:36,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764049719] [2023-11-06 23:08:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:36,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:36,933 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 23:08:36,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:36,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764049719] [2023-11-06 23:08:36,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764049719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:36,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:36,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:08:36,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725716870] [2023-11-06 23:08:36,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:36,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:36,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:36,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:36,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:37,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 240 [2023-11-06 23:08:37,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 23 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 99.4) internal successors, (497), 5 states have internal predecessors, (497), 0 states have call successors, (0), 0 states 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 23:08:37,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:37,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 240 [2023-11-06 23:08:37,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:37,109 INFO L124 PetriNetUnfolderBase]: 268/373 cut-off events. [2023-11-06 23:08:37,109 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:08:37,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 373 events. 268/373 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1104 event pairs, 117 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 755. Up to 364 conditions per place. [2023-11-06 23:08:37,112 INFO L140 encePairwiseOnDemand]: 238/240 looper letters, 18 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-11-06 23:08:37,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 22 transitions, 94 flow [2023-11-06 23:08:37,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 314 transitions. [2023-11-06 23:08:37,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2023-11-06 23:08:37,115 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 314 transitions. [2023-11-06 23:08:37,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 314 transitions. [2023-11-06 23:08:37,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:37,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 314 transitions. [2023-11-06 23:08:37,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states 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 23:08:37,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 23:08:37,124 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 23:08:37,124 INFO L175 Difference]: Start difference. First operand has 31 places, 23 transitions, 58 flow. Second operand 3 states and 314 transitions. [2023-11-06 23:08:37,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 22 transitions, 94 flow [2023-11-06 23:08:37,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 22 transitions, 93 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:37,125 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 57 flow [2023-11-06 23:08:37,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2023-11-06 23:08:37,127 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -11 predicate places. [2023-11-06 23:08:37,127 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 57 flow [2023-11-06 23:08:37,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.4) internal successors, (497), 5 states have internal predecessors, (497), 0 states have call successors, (0), 0 states 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 23:08:37,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:37,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:37,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 23:08:37,128 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:37,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:37,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1539949456, now seen corresponding path program 1 times [2023-11-06 23:08:37,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:37,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387380848] [2023-11-06 23:08:37,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:37,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:37,449 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 23:08:37,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:37,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387380848] [2023-11-06 23:08:37,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387380848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:37,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:37,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:08:37,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332675648] [2023-11-06 23:08:37,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:37,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:08:37,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:37,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:08:37,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:08:37,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 240 [2023-11-06 23:08:37,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states 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 23:08:37,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:37,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 240 [2023-11-06 23:08:37,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:37,582 INFO L124 PetriNetUnfolderBase]: 359/506 cut-off events. [2023-11-06 23:08:37,582 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-06 23:08:37,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1032 conditions, 506 events. 359/506 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1623 event pairs, 39 based on Foata normal form. 1/304 useless extension candidates. Maximal degree in co-relation 1028. Up to 421 conditions per place. [2023-11-06 23:08:37,587 INFO L140 encePairwiseOnDemand]: 235/240 looper letters, 30 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2023-11-06 23:08:37,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 38 transitions, 164 flow [2023-11-06 23:08:37,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:37,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:37,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-11-06 23:08:37,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2023-11-06 23:08:37,590 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-11-06 23:08:37,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-11-06 23:08:37,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:37,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-11-06 23:08:37,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states 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 23:08:37,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 23:08:37,597 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 23:08:37,598 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 57 flow. Second operand 3 states and 378 transitions. [2023-11-06 23:08:37,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 38 transitions, 164 flow [2023-11-06 23:08:37,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 163 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:37,601 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 82 flow [2023-11-06 23:08:37,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-11-06 23:08:37,605 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -9 predicate places. [2023-11-06 23:08:37,606 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 82 flow [2023-11-06 23:08:37,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states 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 23:08:37,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:37,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:37,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 23:08:37,607 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:37,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:37,607 INFO L85 PathProgramCache]: Analyzing trace with hash -816586781, now seen corresponding path program 1 times [2023-11-06 23:08:37,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:37,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732101435] [2023-11-06 23:08:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:37,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:37,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:37,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732101435] [2023-11-06 23:08:37,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732101435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:37,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:37,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:08:37,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278793858] [2023-11-06 23:08:37,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:37,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:37,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:37,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:37,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:37,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 240 [2023-11-06 23:08:37,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 108.8) internal successors, (544), 5 states have internal predecessors, (544), 0 states have call successors, (0), 0 states 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 23:08:37,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:37,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 240 [2023-11-06 23:08:37,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:38,112 INFO L124 PetriNetUnfolderBase]: 483/743 cut-off events. [2023-11-06 23:08:38,112 INFO L125 PetriNetUnfolderBase]: For 191/196 co-relation queries the response was YES. [2023-11-06 23:08:38,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1746 conditions, 743 events. 483/743 cut-off events. For 191/196 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3030 event pairs, 115 based on Foata normal form. 89/813 useless extension candidates. Maximal degree in co-relation 1741. Up to 375 conditions per place. [2023-11-06 23:08:38,119 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 49 selfloop transitions, 6 changer transitions 4/60 dead transitions. [2023-11-06 23:08:38,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 60 transitions, 293 flow [2023-11-06 23:08:38,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:08:38,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:08:38,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 583 transitions. [2023-11-06 23:08:38,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48583333333333334 [2023-11-06 23:08:38,123 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 583 transitions. [2023-11-06 23:08:38,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 583 transitions. [2023-11-06 23:08:38,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:38,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 583 transitions. [2023-11-06 23:08:38,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states 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 23:08:38,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 23:08:38,129 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 23:08:38,129 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 82 flow. Second operand 5 states and 583 transitions. [2023-11-06 23:08:38,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 60 transitions, 293 flow [2023-11-06 23:08:38,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 60 transitions, 287 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:38,135 INFO L231 Difference]: Finished difference. Result has 39 places, 29 transitions, 133 flow [2023-11-06 23:08:38,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=133, PETRI_PLACES=39, PETRI_TRANSITIONS=29} [2023-11-06 23:08:38,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-11-06 23:08:38,152 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 29 transitions, 133 flow [2023-11-06 23:08:38,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.8) internal successors, (544), 5 states have internal predecessors, (544), 0 states have call successors, (0), 0 states 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 23:08:38,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:38,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:38,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 23:08:38,153 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:38,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:38,154 INFO L85 PathProgramCache]: Analyzing trace with hash 690322397, now seen corresponding path program 1 times [2023-11-06 23:08:38,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:38,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307262112] [2023-11-06 23:08:38,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:38,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:38,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:38,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307262112] [2023-11-06 23:08:38,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307262112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:38,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:38,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:08:38,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830199740] [2023-11-06 23:08:38,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:38,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:38,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:38,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:38,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:38,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 240 [2023-11-06 23:08:38,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 29 transitions, 133 flow. Second operand has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states 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 23:08:38,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:38,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 240 [2023-11-06 23:08:38,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:38,531 INFO L124 PetriNetUnfolderBase]: 540/810 cut-off events. [2023-11-06 23:08:38,531 INFO L125 PetriNetUnfolderBase]: For 1326/1407 co-relation queries the response was YES. [2023-11-06 23:08:38,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2620 conditions, 810 events. 540/810 cut-off events. For 1326/1407 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3172 event pairs, 198 based on Foata normal form. 55/837 useless extension candidates. Maximal degree in co-relation 2612. Up to 642 conditions per place. [2023-11-06 23:08:38,539 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 40 selfloop transitions, 12 changer transitions 0/54 dead transitions. [2023-11-06 23:08:38,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 54 transitions, 361 flow [2023-11-06 23:08:38,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:08:38,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:08:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 565 transitions. [2023-11-06 23:08:38,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2023-11-06 23:08:38,542 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 565 transitions. [2023-11-06 23:08:38,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 565 transitions. [2023-11-06 23:08:38,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:38,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 565 transitions. [2023-11-06 23:08:38,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.0) internal successors, (565), 5 states have internal predecessors, (565), 0 states have call successors, (0), 0 states 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 23:08:38,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 23:08:38,548 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 23:08:38,548 INFO L175 Difference]: Start difference. First operand has 39 places, 29 transitions, 133 flow. Second operand 5 states and 565 transitions. [2023-11-06 23:08:38,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 54 transitions, 361 flow [2023-11-06 23:08:38,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 348 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:38,556 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 218 flow [2023-11-06 23:08:38,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-11-06 23:08:38,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-11-06 23:08:38,558 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 218 flow [2023-11-06 23:08:38,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states 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 23:08:38,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:38,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:38,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 23:08:38,559 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:38,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:38,559 INFO L85 PathProgramCache]: Analyzing trace with hash 2042726839, now seen corresponding path program 2 times [2023-11-06 23:08:38,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:38,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735504605] [2023-11-06 23:08:38,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:38,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:38,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:38,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735504605] [2023-11-06 23:08:38,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735504605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:38,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:38,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:08:38,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47818385] [2023-11-06 23:08:38,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:38,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:38,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:38,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:38,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:38,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 240 [2023-11-06 23:08:38,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states 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 23:08:38,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:38,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 240 [2023-11-06 23:08:38,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:39,035 INFO L124 PetriNetUnfolderBase]: 647/978 cut-off events. [2023-11-06 23:08:39,036 INFO L125 PetriNetUnfolderBase]: For 2315/2352 co-relation queries the response was YES. [2023-11-06 23:08:39,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3752 conditions, 978 events. 647/978 cut-off events. For 2315/2352 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4033 event pairs, 272 based on Foata normal form. 25/970 useless extension candidates. Maximal degree in co-relation 3741. Up to 722 conditions per place. [2023-11-06 23:08:39,045 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 47 selfloop transitions, 17 changer transitions 8/74 dead transitions. [2023-11-06 23:08:39,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 591 flow [2023-11-06 23:08:39,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:08:39,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:08:39,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 569 transitions. [2023-11-06 23:08:39,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4741666666666667 [2023-11-06 23:08:39,048 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 569 transitions. [2023-11-06 23:08:39,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 569 transitions. [2023-11-06 23:08:39,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:39,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 569 transitions. [2023-11-06 23:08:39,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states 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 23:08:39,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 23:08:39,055 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 23:08:39,055 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 218 flow. Second operand 5 states and 569 transitions. [2023-11-06 23:08:39,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 591 flow [2023-11-06 23:08:39,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 551 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-06 23:08:39,066 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 324 flow [2023-11-06 23:08:39,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=324, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-06 23:08:39,067 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2023-11-06 23:08:39,068 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 324 flow [2023-11-06 23:08:39,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states 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 23:08:39,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:39,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:39,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 23:08:39,069 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:39,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:39,069 INFO L85 PathProgramCache]: Analyzing trace with hash 533127039, now seen corresponding path program 2 times [2023-11-06 23:08:39,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:39,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247489933] [2023-11-06 23:08:39,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:39,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:39,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:39,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247489933] [2023-11-06 23:08:39,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247489933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:39,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:39,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:08:39,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662285997] [2023-11-06 23:08:39,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:39,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:08:39,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:39,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:08:39,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:08:39,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 240 [2023-11-06 23:08:39,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 324 flow. Second operand has 4 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:39,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:39,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 240 [2023-11-06 23:08:39,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:39,545 INFO L124 PetriNetUnfolderBase]: 653/981 cut-off events. [2023-11-06 23:08:39,546 INFO L125 PetriNetUnfolderBase]: For 4218/4352 co-relation queries the response was YES. [2023-11-06 23:08:39,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4436 conditions, 981 events. 653/981 cut-off events. For 4218/4352 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4203 event pairs, 154 based on Foata normal form. 101/1020 useless extension candidates. Maximal degree in co-relation 4422. Up to 591 conditions per place. [2023-11-06 23:08:39,558 INFO L140 encePairwiseOnDemand]: 235/240 looper letters, 49 selfloop transitions, 12 changer transitions 15/81 dead transitions. [2023-11-06 23:08:39,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 81 transitions, 692 flow [2023-11-06 23:08:39,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:08:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:08:39,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 478 transitions. [2023-11-06 23:08:39,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4979166666666667 [2023-11-06 23:08:39,562 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 478 transitions. [2023-11-06 23:08:39,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 478 transitions. [2023-11-06 23:08:39,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:39,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 478 transitions. [2023-11-06 23:08:39,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states 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 23:08:39,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states 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 23:08:39,569 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states 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 23:08:39,569 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 324 flow. Second operand 4 states and 478 transitions. [2023-11-06 23:08:39,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 81 transitions, 692 flow [2023-11-06 23:08:39,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 81 transitions, 664 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:39,579 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 393 flow [2023-11-06 23:08:39,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=393, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-11-06 23:08:39,581 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2023-11-06 23:08:39,581 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 393 flow [2023-11-06 23:08:39,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:39,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:39,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:39,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 23:08:39,582 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:39,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:39,583 INFO L85 PathProgramCache]: Analyzing trace with hash 666490183, now seen corresponding path program 3 times [2023-11-06 23:08:39,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:39,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882037961] [2023-11-06 23:08:39,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:39,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:39,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:39,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882037961] [2023-11-06 23:08:39,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882037961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:39,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:39,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:08:39,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903949348] [2023-11-06 23:08:39,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:39,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:39,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:39,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:39,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:39,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 240 [2023-11-06 23:08:39,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 393 flow. Second operand has 5 states, 5 states have (on average 108.8) internal successors, (544), 5 states have internal predecessors, (544), 0 states have call successors, (0), 0 states 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 23:08:39,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:39,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 240 [2023-11-06 23:08:39,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:40,131 INFO L124 PetriNetUnfolderBase]: 859/1329 cut-off events. [2023-11-06 23:08:40,131 INFO L125 PetriNetUnfolderBase]: For 6267/6308 co-relation queries the response was YES. [2023-11-06 23:08:40,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5822 conditions, 1329 events. 859/1329 cut-off events. For 6267/6308 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6127 event pairs, 204 based on Foata normal form. 85/1375 useless extension candidates. Maximal degree in co-relation 5806. Up to 681 conditions per place. [2023-11-06 23:08:40,169 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 70 selfloop transitions, 10 changer transitions 16/98 dead transitions. [2023-11-06 23:08:40,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 98 transitions, 911 flow [2023-11-06 23:08:40,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:08:40,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:08:40,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 579 transitions. [2023-11-06 23:08:40,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825 [2023-11-06 23:08:40,173 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 579 transitions. [2023-11-06 23:08:40,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 579 transitions. [2023-11-06 23:08:40,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:40,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 579 transitions. [2023-11-06 23:08:40,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.8) internal successors, (579), 5 states have internal predecessors, (579), 0 states have call successors, (0), 0 states 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 23:08:40,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 23:08:40,180 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 23:08:40,180 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 393 flow. Second operand 5 states and 579 transitions. [2023-11-06 23:08:40,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 98 transitions, 911 flow [2023-11-06 23:08:40,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 98 transitions, 899 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:40,199 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 478 flow [2023-11-06 23:08:40,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=478, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2023-11-06 23:08:40,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2023-11-06 23:08:40,200 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 478 flow [2023-11-06 23:08:40,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.8) internal successors, (544), 5 states have internal predecessors, (544), 0 states have call successors, (0), 0 states 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 23:08:40,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:40,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:40,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 23:08:40,201 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:40,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:40,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1510884469, now seen corresponding path program 4 times [2023-11-06 23:08:40,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:40,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715682173] [2023-11-06 23:08:40,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:40,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:40,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:40,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715682173] [2023-11-06 23:08:40,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715682173] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:40,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:40,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:08:40,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991628950] [2023-11-06 23:08:40,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:40,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:08:40,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:40,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:08:40,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:08:40,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 240 [2023-11-06 23:08:40,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 478 flow. Second operand has 4 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:40,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:40,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 240 [2023-11-06 23:08:40,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:40,704 INFO L124 PetriNetUnfolderBase]: 838/1303 cut-off events. [2023-11-06 23:08:40,704 INFO L125 PetriNetUnfolderBase]: For 9626/10014 co-relation queries the response was YES. [2023-11-06 23:08:40,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6868 conditions, 1303 events. 838/1303 cut-off events. For 9626/10014 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5983 event pairs, 202 based on Foata normal form. 201/1437 useless extension candidates. Maximal degree in co-relation 6849. Up to 850 conditions per place. [2023-11-06 23:08:40,719 INFO L140 encePairwiseOnDemand]: 235/240 looper letters, 57 selfloop transitions, 12 changer transitions 16/90 dead transitions. [2023-11-06 23:08:40,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 920 flow [2023-11-06 23:08:40,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:08:40,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:08:40,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 480 transitions. [2023-11-06 23:08:40,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-06 23:08:40,722 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 480 transitions. [2023-11-06 23:08:40,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 480 transitions. [2023-11-06 23:08:40,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:40,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 480 transitions. [2023-11-06 23:08:40,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 23:08:40,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states 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 23:08:40,727 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states 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 23:08:40,727 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 478 flow. Second operand 4 states and 480 transitions. [2023-11-06 23:08:40,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 920 flow [2023-11-06 23:08:40,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 90 transitions, 868 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-11-06 23:08:40,754 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 531 flow [2023-11-06 23:08:40,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=531, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2023-11-06 23:08:40,755 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2023-11-06 23:08:40,755 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 531 flow [2023-11-06 23:08:40,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:40,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:40,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:40,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 23:08:40,756 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:40,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:40,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1496695419, now seen corresponding path program 5 times [2023-11-06 23:08:40,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:40,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310662461] [2023-11-06 23:08:40,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:40,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:40,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:40,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310662461] [2023-11-06 23:08:40,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310662461] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:40,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:40,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:08:40,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95295823] [2023-11-06 23:08:40,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:40,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:40,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:40,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:40,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:40,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 240 [2023-11-06 23:08:40,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 531 flow. Second operand has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states 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 23:08:40,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:40,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 240 [2023-11-06 23:08:40,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:41,296 INFO L124 PetriNetUnfolderBase]: 1066/1618 cut-off events. [2023-11-06 23:08:41,296 INFO L125 PetriNetUnfolderBase]: For 12421/12671 co-relation queries the response was YES. [2023-11-06 23:08:41,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8611 conditions, 1618 events. 1066/1618 cut-off events. For 12421/12671 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 7445 event pairs, 364 based on Foata normal form. 184/1768 useless extension candidates. Maximal degree in co-relation 8591. Up to 1148 conditions per place. [2023-11-06 23:08:41,319 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 63 selfloop transitions, 24 changer transitions 10/100 dead transitions. [2023-11-06 23:08:41,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 100 transitions, 1179 flow [2023-11-06 23:08:41,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:08:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:08:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 565 transitions. [2023-11-06 23:08:41,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2023-11-06 23:08:41,323 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 565 transitions. [2023-11-06 23:08:41,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 565 transitions. [2023-11-06 23:08:41,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:41,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 565 transitions. [2023-11-06 23:08:41,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.0) internal successors, (565), 5 states have internal predecessors, (565), 0 states have call successors, (0), 0 states 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 23:08:41,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 23:08:41,330 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 23:08:41,330 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 531 flow. Second operand 5 states and 565 transitions. [2023-11-06 23:08:41,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 100 transitions, 1179 flow [2023-11-06 23:08:41,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 100 transitions, 1160 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:41,350 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 821 flow [2023-11-06 23:08:41,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=821, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2023-11-06 23:08:41,351 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2023-11-06 23:08:41,352 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 821 flow [2023-11-06 23:08:41,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states 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 23:08:41,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:41,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:41,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 23:08:41,353 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:41,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:41,354 INFO L85 PathProgramCache]: Analyzing trace with hash 220082011, now seen corresponding path program 6 times [2023-11-06 23:08:41,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:41,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498505120] [2023-11-06 23:08:41,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:41,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:41,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:41,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498505120] [2023-11-06 23:08:41,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498505120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:41,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:41,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:08:41,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595208834] [2023-11-06 23:08:41,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:41,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:41,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:41,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:41,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:41,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 240 [2023-11-06 23:08:41,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 821 flow. Second operand has 5 states, 5 states have (on average 108.8) internal successors, (544), 5 states have internal predecessors, (544), 0 states have call successors, (0), 0 states 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 23:08:41,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:41,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 240 [2023-11-06 23:08:41,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:41,951 INFO L124 PetriNetUnfolderBase]: 1075/1681 cut-off events. [2023-11-06 23:08:41,951 INFO L125 PetriNetUnfolderBase]: For 16118/16394 co-relation queries the response was YES. [2023-11-06 23:08:41,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9767 conditions, 1681 events. 1075/1681 cut-off events. For 16118/16394 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 8183 event pairs, 375 based on Foata normal form. 214/1861 useless extension candidates. Maximal degree in co-relation 9744. Up to 997 conditions per place. [2023-11-06 23:08:41,985 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 74 selfloop transitions, 16 changer transitions 13/106 dead transitions. [2023-11-06 23:08:41,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 106 transitions, 1313 flow [2023-11-06 23:08:41,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:08:41,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:08:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 575 transitions. [2023-11-06 23:08:41,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2023-11-06 23:08:41,989 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 575 transitions. [2023-11-06 23:08:41,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 575 transitions. [2023-11-06 23:08:41,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:41,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 575 transitions. [2023-11-06 23:08:41,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states 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 23:08:41,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 23:08:41,997 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 23:08:41,998 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 821 flow. Second operand 5 states and 575 transitions. [2023-11-06 23:08:41,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 106 transitions, 1313 flow [2023-11-06 23:08:42,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 106 transitions, 1269 flow, removed 22 selfloop flow, removed 0 redundant places. [2023-11-06 23:08:42,032 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 842 flow [2023-11-06 23:08:42,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=842, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2023-11-06 23:08:42,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2023-11-06 23:08:42,034 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 842 flow [2023-11-06 23:08:42,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.8) internal successors, (544), 5 states have internal predecessors, (544), 0 states have call successors, (0), 0 states 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 23:08:42,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:42,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:42,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 23:08:42,035 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:42,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:42,036 INFO L85 PathProgramCache]: Analyzing trace with hash -781416839, now seen corresponding path program 1 times [2023-11-06 23:08:42,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:42,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048484756] [2023-11-06 23:08:42,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:42,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:42,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:42,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048484756] [2023-11-06 23:08:42,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048484756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:42,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:42,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:08:42,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305364991] [2023-11-06 23:08:42,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:42,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:08:42,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:42,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:08:42,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:08:42,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 240 [2023-11-06 23:08:42,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 842 flow. Second operand has 4 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:42,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:42,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 240 [2023-11-06 23:08:42,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:42,510 INFO L124 PetriNetUnfolderBase]: 979/1508 cut-off events. [2023-11-06 23:08:42,510 INFO L125 PetriNetUnfolderBase]: For 18064/18384 co-relation queries the response was YES. [2023-11-06 23:08:42,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9456 conditions, 1508 events. 979/1508 cut-off events. For 18064/18384 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 7035 event pairs, 351 based on Foata normal form. 253/1700 useless extension candidates. Maximal degree in co-relation 9430. Up to 1002 conditions per place. [2023-11-06 23:08:42,528 INFO L140 encePairwiseOnDemand]: 235/240 looper letters, 46 selfloop transitions, 33 changer transitions 17/102 dead transitions. [2023-11-06 23:08:42,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 102 transitions, 1366 flow [2023-11-06 23:08:42,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:08:42,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:08:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 472 transitions. [2023-11-06 23:08:42,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2023-11-06 23:08:42,531 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 472 transitions. [2023-11-06 23:08:42,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 472 transitions. [2023-11-06 23:08:42,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:42,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 472 transitions. [2023-11-06 23:08:42,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.0) internal successors, (472), 4 states have internal predecessors, (472), 0 states have call successors, (0), 0 states 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 23:08:42,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states 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 23:08:42,537 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states 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 23:08:42,537 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 842 flow. Second operand 4 states and 472 transitions. [2023-11-06 23:08:42,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 102 transitions, 1366 flow [2023-11-06 23:08:42,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 102 transitions, 1301 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-11-06 23:08:42,568 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 936 flow [2023-11-06 23:08:42,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=936, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2023-11-06 23:08:42,569 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2023-11-06 23:08:42,569 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 936 flow [2023-11-06 23:08:42,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:42,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:42,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:42,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-06 23:08:42,570 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:42,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:42,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1762560625, now seen corresponding path program 7 times [2023-11-06 23:08:42,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:42,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792585372] [2023-11-06 23:08:42,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:42,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:42,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:42,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792585372] [2023-11-06 23:08:42,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792585372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:42,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:42,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:08:42,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031729127] [2023-11-06 23:08:42,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:42,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:08:42,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:42,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:08:42,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:08:42,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 240 [2023-11-06 23:08:42,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 936 flow. Second operand has 4 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:42,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:42,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 240 [2023-11-06 23:08:42,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:43,041 INFO L124 PetriNetUnfolderBase]: 909/1369 cut-off events. [2023-11-06 23:08:43,041 INFO L125 PetriNetUnfolderBase]: For 14206/14527 co-relation queries the response was YES. [2023-11-06 23:08:43,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8809 conditions, 1369 events. 909/1369 cut-off events. For 14206/14527 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5757 event pairs, 189 based on Foata normal form. 173/1488 useless extension candidates. Maximal degree in co-relation 8782. Up to 1096 conditions per place. [2023-11-06 23:08:43,057 INFO L140 encePairwiseOnDemand]: 235/240 looper letters, 69 selfloop transitions, 18 changer transitions 3/98 dead transitions. [2023-11-06 23:08:43,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 98 transitions, 1368 flow [2023-11-06 23:08:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:08:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:08:43,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 474 transitions. [2023-11-06 23:08:43,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49375 [2023-11-06 23:08:43,061 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 474 transitions. [2023-11-06 23:08:43,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 474 transitions. [2023-11-06 23:08:43,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:43,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 474 transitions. [2023-11-06 23:08:43,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 23:08:43,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states 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 23:08:43,066 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states 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 23:08:43,067 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 936 flow. Second operand 4 states and 474 transitions. [2023-11-06 23:08:43,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 98 transitions, 1368 flow [2023-11-06 23:08:43,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 98 transitions, 1277 flow, removed 33 selfloop flow, removed 5 redundant places. [2023-11-06 23:08:43,092 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 991 flow [2023-11-06 23:08:43,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=991, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2023-11-06 23:08:43,093 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2023-11-06 23:08:43,093 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 991 flow [2023-11-06 23:08:43,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:43,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:43,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:43,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-06 23:08:43,094 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:43,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:43,095 INFO L85 PathProgramCache]: Analyzing trace with hash 335719537, now seen corresponding path program 8 times [2023-11-06 23:08:43,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:43,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939237453] [2023-11-06 23:08:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:43,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:43,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:43,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939237453] [2023-11-06 23:08:43,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939237453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:43,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:43,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:08:43,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005318629] [2023-11-06 23:08:43,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:43,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:08:43,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:43,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:08:43,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:08:43,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 240 [2023-11-06 23:08:43,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 991 flow. Second operand has 4 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:43,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:43,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 240 [2023-11-06 23:08:43,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:43,538 INFO L124 PetriNetUnfolderBase]: 947/1386 cut-off events. [2023-11-06 23:08:43,538 INFO L125 PetriNetUnfolderBase]: For 15957/16284 co-relation queries the response was YES. [2023-11-06 23:08:43,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8964 conditions, 1386 events. 947/1386 cut-off events. For 15957/16284 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5636 event pairs, 233 based on Foata normal form. 227/1566 useless extension candidates. Maximal degree in co-relation 8939. Up to 897 conditions per place. [2023-11-06 23:08:43,554 INFO L140 encePairwiseOnDemand]: 235/240 looper letters, 70 selfloop transitions, 35 changer transitions 3/116 dead transitions. [2023-11-06 23:08:43,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 116 transitions, 1676 flow [2023-11-06 23:08:43,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:08:43,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:08:43,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 474 transitions. [2023-11-06 23:08:43,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49375 [2023-11-06 23:08:43,557 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 474 transitions. [2023-11-06 23:08:43,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 474 transitions. [2023-11-06 23:08:43,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:43,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 474 transitions. [2023-11-06 23:08:43,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 23:08:43,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states 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 23:08:43,563 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states 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 23:08:43,563 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 991 flow. Second operand 4 states and 474 transitions. [2023-11-06 23:08:43,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 116 transitions, 1676 flow [2023-11-06 23:08:43,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 116 transitions, 1658 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:43,583 INFO L231 Difference]: Finished difference. Result has 73 places, 91 transitions, 1377 flow [2023-11-06 23:08:43,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1377, PETRI_PLACES=73, PETRI_TRANSITIONS=91} [2023-11-06 23:08:43,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2023-11-06 23:08:43,585 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 91 transitions, 1377 flow [2023-11-06 23:08:43,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:43,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:43,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:43,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-06 23:08:43,586 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:43,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:43,586 INFO L85 PathProgramCache]: Analyzing trace with hash -501099266, now seen corresponding path program 1 times [2023-11-06 23:08:43,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:43,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092737546] [2023-11-06 23:08:43,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:43,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:43,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:43,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092737546] [2023-11-06 23:08:43,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092737546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:43,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056574473] [2023-11-06 23:08:43,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:43,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:43,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:43,718 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:43,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:08:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:43,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:08:43,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:43,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:44,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056574473] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:44,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:44,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2023-11-06 23:08:44,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264198239] [2023-11-06 23:08:44,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:44,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:08:44,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:44,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:08:44,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:08:44,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 240 [2023-11-06 23:08:44,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 91 transitions, 1377 flow. Second operand has 9 states, 9 states have (on average 105.44444444444444) internal successors, (949), 9 states have internal predecessors, (949), 0 states have call successors, (0), 0 states 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 23:08:44,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:44,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 240 [2023-11-06 23:08:44,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:44,704 INFO L124 PetriNetUnfolderBase]: 1213/1740 cut-off events. [2023-11-06 23:08:44,704 INFO L125 PetriNetUnfolderBase]: For 20261/20261 co-relation queries the response was YES. [2023-11-06 23:08:44,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12337 conditions, 1740 events. 1213/1740 cut-off events. For 20261/20261 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6825 event pairs, 211 based on Foata normal form. 48/1788 useless extension candidates. Maximal degree in co-relation 12311. Up to 913 conditions per place. [2023-11-06 23:08:44,726 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 88 selfloop transitions, 89 changer transitions 2/179 dead transitions. [2023-11-06 23:08:44,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 179 transitions, 2790 flow [2023-11-06 23:08:44,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:08:44,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 23:08:44,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1102 transitions. [2023-11-06 23:08:44,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45916666666666667 [2023-11-06 23:08:44,731 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1102 transitions. [2023-11-06 23:08:44,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1102 transitions. [2023-11-06 23:08:44,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:44,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1102 transitions. [2023-11-06 23:08:44,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 110.2) internal successors, (1102), 10 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states 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 23:08:44,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 240.0) internal successors, (2640), 11 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states 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 23:08:44,742 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 240.0) internal successors, (2640), 11 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states 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 23:08:44,742 INFO L175 Difference]: Start difference. First operand has 73 places, 91 transitions, 1377 flow. Second operand 10 states and 1102 transitions. [2023-11-06 23:08:44,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 179 transitions, 2790 flow [2023-11-06 23:08:44,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 179 transitions, 2540 flow, removed 87 selfloop flow, removed 2 redundant places. [2023-11-06 23:08:44,781 INFO L231 Difference]: Finished difference. Result has 83 places, 130 transitions, 2139 flow [2023-11-06 23:08:44,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2139, PETRI_PLACES=83, PETRI_TRANSITIONS=130} [2023-11-06 23:08:44,782 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2023-11-06 23:08:44,782 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 130 transitions, 2139 flow [2023-11-06 23:08:44,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 105.44444444444444) internal successors, (949), 9 states have internal predecessors, (949), 0 states have call successors, (0), 0 states 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 23:08:44,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:44,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:44,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:44,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:44,991 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:44,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:44,991 INFO L85 PathProgramCache]: Analyzing trace with hash 443081611, now seen corresponding path program 1 times [2023-11-06 23:08:44,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:44,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301753066] [2023-11-06 23:08:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:44,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:45,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:45,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301753066] [2023-11-06 23:08:45,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301753066] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:45,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105389770] [2023-11-06 23:08:45,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:45,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:45,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:45,397 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:45,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:08:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:45,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:08:45,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:45,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:46,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105389770] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:46,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:46,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2023-11-06 23:08:46,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278412249] [2023-11-06 23:08:46,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:46,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:08:46,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:46,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:08:46,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:08:46,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 240 [2023-11-06 23:08:46,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 130 transitions, 2139 flow. Second operand has 11 states, 11 states have (on average 111.36363636363636) internal successors, (1225), 11 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states 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 23:08:46,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:46,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 240 [2023-11-06 23:08:46,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:47,606 INFO L124 PetriNetUnfolderBase]: 1504/2142 cut-off events. [2023-11-06 23:08:47,606 INFO L125 PetriNetUnfolderBase]: For 30619/31359 co-relation queries the response was YES. [2023-11-06 23:08:47,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16074 conditions, 2142 events. 1504/2142 cut-off events. For 30619/31359 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 8626 event pairs, 48 based on Foata normal form. 138/2128 useless extension candidates. Maximal degree in co-relation 16044. Up to 1521 conditions per place. [2023-11-06 23:08:47,637 INFO L140 encePairwiseOnDemand]: 235/240 looper letters, 140 selfloop transitions, 67 changer transitions 2/227 dead transitions. [2023-11-06 23:08:47,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 227 transitions, 3379 flow [2023-11-06 23:08:47,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:08:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:08:47,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1065 transitions. [2023-11-06 23:08:47,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930555555555556 [2023-11-06 23:08:47,643 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1065 transitions. [2023-11-06 23:08:47,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1065 transitions. [2023-11-06 23:08:47,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:47,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1065 transitions. [2023-11-06 23:08:47,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 118.33333333333333) internal successors, (1065), 9 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states 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 23:08:47,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 23:08:47,654 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 23:08:47,655 INFO L175 Difference]: Start difference. First operand has 83 places, 130 transitions, 2139 flow. Second operand 9 states and 1065 transitions. [2023-11-06 23:08:47,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 227 transitions, 3379 flow [2023-11-06 23:08:47,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 227 transitions, 2913 flow, removed 135 selfloop flow, removed 6 redundant places. [2023-11-06 23:08:47,718 INFO L231 Difference]: Finished difference. Result has 88 places, 167 transitions, 2550 flow [2023-11-06 23:08:47,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=1779, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2550, PETRI_PLACES=88, PETRI_TRANSITIONS=167} [2023-11-06 23:08:47,719 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2023-11-06 23:08:47,719 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 167 transitions, 2550 flow [2023-11-06 23:08:47,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 111.36363636363636) internal successors, (1225), 11 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states 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 23:08:47,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:47,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:47,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:47,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:47,927 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:47,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:47,928 INFO L85 PathProgramCache]: Analyzing trace with hash -695205433, now seen corresponding path program 2 times [2023-11-06 23:08:47,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:47,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078385474] [2023-11-06 23:08:47,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:47,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:48,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:48,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078385474] [2023-11-06 23:08:48,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078385474] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:48,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611834070] [2023-11-06 23:08:48,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:08:48,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:48,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:48,282 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:48,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:08:48,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:08:48,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:48,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:08:48,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:48,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:49,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611834070] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:49,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:49,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-11-06 23:08:49,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819310354] [2023-11-06 23:08:49,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:49,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:08:49,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:49,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:08:49,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:08:49,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 240 [2023-11-06 23:08:49,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 167 transitions, 2550 flow. Second operand has 10 states, 10 states have (on average 111.5) internal successors, (1115), 10 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states 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 23:08:49,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:49,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 240 [2023-11-06 23:08:49,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:50,579 INFO L124 PetriNetUnfolderBase]: 1838/2632 cut-off events. [2023-11-06 23:08:50,579 INFO L125 PetriNetUnfolderBase]: For 33530/34264 co-relation queries the response was YES. [2023-11-06 23:08:50,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18533 conditions, 2632 events. 1838/2632 cut-off events. For 33530/34264 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 11006 event pairs, 188 based on Foata normal form. 144/2618 useless extension candidates. Maximal degree in co-relation 18502. Up to 2045 conditions per place. [2023-11-06 23:08:50,616 INFO L140 encePairwiseOnDemand]: 235/240 looper letters, 155 selfloop transitions, 67 changer transitions 2/242 dead transitions. [2023-11-06 23:08:50,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 242 transitions, 3519 flow [2023-11-06 23:08:50,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:08:50,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:08:50,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1061 transitions. [2023-11-06 23:08:50,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912037037037037 [2023-11-06 23:08:50,622 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1061 transitions. [2023-11-06 23:08:50,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1061 transitions. [2023-11-06 23:08:50,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:50,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1061 transitions. [2023-11-06 23:08:50,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 117.88888888888889) internal successors, (1061), 9 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states 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 23:08:50,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 23:08:50,641 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 23:08:50,642 INFO L175 Difference]: Start difference. First operand has 88 places, 167 transitions, 2550 flow. Second operand 9 states and 1061 transitions. [2023-11-06 23:08:50,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 242 transitions, 3519 flow [2023-11-06 23:08:50,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 242 transitions, 3243 flow, removed 123 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:50,734 INFO L231 Difference]: Finished difference. Result has 98 places, 186 transitions, 2796 flow [2023-11-06 23:08:50,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=2274, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2796, PETRI_PLACES=98, PETRI_TRANSITIONS=186} [2023-11-06 23:08:50,735 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2023-11-06 23:08:50,735 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 186 transitions, 2796 flow [2023-11-06 23:08:50,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 111.5) internal successors, (1115), 10 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states 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 23:08:50,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:50,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:50,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:50,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 23:08:50,944 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:50,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:50,944 INFO L85 PathProgramCache]: Analyzing trace with hash 147950383, now seen corresponding path program 3 times [2023-11-06 23:08:50,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:50,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999170479] [2023-11-06 23:08:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:50,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:51,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:51,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999170479] [2023-11-06 23:08:51,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999170479] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:51,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376917666] [2023-11-06 23:08:51,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:08:51,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:51,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:51,335 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:51,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:08:51,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:08:51,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:51,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:08:51,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:51,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:52,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376917666] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:52,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:52,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2023-11-06 23:08:52,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747344652] [2023-11-06 23:08:52,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:52,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:08:52,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:52,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:08:52,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:08:52,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 240 [2023-11-06 23:08:52,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 186 transitions, 2796 flow. Second operand has 11 states, 11 states have (on average 111.36363636363636) internal successors, (1225), 11 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states 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 23:08:52,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:52,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 240 [2023-11-06 23:08:52,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:53,460 INFO L124 PetriNetUnfolderBase]: 2298/3298 cut-off events. [2023-11-06 23:08:53,461 INFO L125 PetriNetUnfolderBase]: For 42426/43266 co-relation queries the response was YES. [2023-11-06 23:08:53,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22421 conditions, 3298 events. 2298/3298 cut-off events. For 42426/43266 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 14484 event pairs, 350 based on Foata normal form. 174/3290 useless extension candidates. Maximal degree in co-relation 22386. Up to 2695 conditions per place. [2023-11-06 23:08:53,503 INFO L140 encePairwiseOnDemand]: 235/240 looper letters, 192 selfloop transitions, 70 changer transitions 2/282 dead transitions. [2023-11-06 23:08:53,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 282 transitions, 4173 flow [2023-11-06 23:08:53,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:08:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:08:53,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1061 transitions. [2023-11-06 23:08:53,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912037037037037 [2023-11-06 23:08:53,508 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1061 transitions. [2023-11-06 23:08:53,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1061 transitions. [2023-11-06 23:08:53,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:53,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1061 transitions. [2023-11-06 23:08:53,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 117.88888888888889) internal successors, (1061), 9 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states 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 23:08:53,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 23:08:53,518 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 23:08:53,518 INFO L175 Difference]: Start difference. First operand has 98 places, 186 transitions, 2796 flow. Second operand 9 states and 1061 transitions. [2023-11-06 23:08:53,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 282 transitions, 4173 flow [2023-11-06 23:08:53,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 282 transitions, 3884 flow, removed 115 selfloop flow, removed 2 redundant places. [2023-11-06 23:08:53,706 INFO L231 Difference]: Finished difference. Result has 108 places, 226 transitions, 3417 flow [2023-11-06 23:08:53,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=2507, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3417, PETRI_PLACES=108, PETRI_TRANSITIONS=226} [2023-11-06 23:08:53,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2023-11-06 23:08:53,707 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 226 transitions, 3417 flow [2023-11-06 23:08:53,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 111.36363636363636) internal successors, (1225), 11 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states 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 23:08:53,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:53,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:53,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:53,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 23:08:53,916 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:53,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:53,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1796300907, now seen corresponding path program 4 times [2023-11-06 23:08:53,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:53,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082027720] [2023-11-06 23:08:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:53,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:54,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:54,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082027720] [2023-11-06 23:08:54,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082027720] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:54,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036870373] [2023-11-06 23:08:54,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:08:54,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:54,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:54,377 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:54,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:08:54,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:08:54,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:54,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:08:54,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:54,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:55,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036870373] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:55,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:55,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-11-06 23:08:55,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454095834] [2023-11-06 23:08:55,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:55,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:08:55,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:55,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:08:55,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:08:55,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 240 [2023-11-06 23:08:55,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 226 transitions, 3417 flow. Second operand has 10 states, 10 states have (on average 111.7) internal successors, (1117), 10 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states 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 23:08:55,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:55,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 240 [2023-11-06 23:08:55,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:56,538 INFO L124 PetriNetUnfolderBase]: 2606/3750 cut-off events. [2023-11-06 23:08:56,539 INFO L125 PetriNetUnfolderBase]: For 46508/47360 co-relation queries the response was YES. [2023-11-06 23:08:56,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25236 conditions, 3750 events. 2606/3750 cut-off events. For 46508/47360 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 16928 event pairs, 486 based on Foata normal form. 168/3732 useless extension candidates. Maximal degree in co-relation 25196. Up to 3211 conditions per place. [2023-11-06 23:08:56,667 INFO L140 encePairwiseOnDemand]: 235/240 looper letters, 205 selfloop transitions, 70 changer transitions 2/295 dead transitions. [2023-11-06 23:08:56,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 295 transitions, 4539 flow [2023-11-06 23:08:56,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:08:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:08:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1055 transitions. [2023-11-06 23:08:56,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2023-11-06 23:08:56,673 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1055 transitions. [2023-11-06 23:08:56,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1055 transitions. [2023-11-06 23:08:56,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:56,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1055 transitions. [2023-11-06 23:08:56,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 117.22222222222223) internal successors, (1055), 9 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states 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 23:08:56,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 23:08:56,682 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 23:08:56,682 INFO L175 Difference]: Start difference. First operand has 108 places, 226 transitions, 3417 flow. Second operand 9 states and 1055 transitions. [2023-11-06 23:08:56,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 295 transitions, 4539 flow [2023-11-06 23:08:56,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 295 transitions, 4201 flow, removed 154 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:56,802 INFO L231 Difference]: Finished difference. Result has 118 places, 245 transitions, 3651 flow [2023-11-06 23:08:56,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=3079, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3651, PETRI_PLACES=118, PETRI_TRANSITIONS=245} [2023-11-06 23:08:56,803 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2023-11-06 23:08:56,804 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 245 transitions, 3651 flow [2023-11-06 23:08:56,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 111.7) internal successors, (1117), 10 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states 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 23:08:56,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:56,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:56,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:57,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 23:08:57,011 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:08:57,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:57,012 INFO L85 PathProgramCache]: Analyzing trace with hash 617515647, now seen corresponding path program 5 times [2023-11-06 23:08:57,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:57,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89131877] [2023-11-06 23:08:57,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:57,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:57,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:57,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89131877] [2023-11-06 23:08:57,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89131877] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:57,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688446238] [2023-11-06 23:08:57,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:08:57,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:57,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:57,362 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:57,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:08:57,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:08:57,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:57,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:08:57,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:57,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:59,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688446238] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:59,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:59,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-11-06 23:08:59,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900817727] [2023-11-06 23:08:59,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:59,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:08:59,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:59,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:08:59,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:08:59,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 240 [2023-11-06 23:08:59,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 245 transitions, 3651 flow. Second operand has 10 states, 10 states have (on average 111.6) internal successors, (1116), 10 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states 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 23:08:59,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:59,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 240 [2023-11-06 23:08:59,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:00,772 INFO L124 PetriNetUnfolderBase]: 3026/4360 cut-off events. [2023-11-06 23:09:00,772 INFO L125 PetriNetUnfolderBase]: For 53912/54843 co-relation queries the response was YES. [2023-11-06 23:09:00,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28960 conditions, 4360 events. 3026/4360 cut-off events. For 53912/54843 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 20327 event pairs, 626 based on Foata normal form. 210/4380 useless extension candidates. Maximal degree in co-relation 28916. Up to 3791 conditions per place. [2023-11-06 23:09:00,841 INFO L140 encePairwiseOnDemand]: 235/240 looper letters, 245 selfloop transitions, 66 changer transitions 2/331 dead transitions. [2023-11-06 23:09:00,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 331 transitions, 5182 flow [2023-11-06 23:09:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:09:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:09:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1055 transitions. [2023-11-06 23:09:00,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2023-11-06 23:09:00,845 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1055 transitions. [2023-11-06 23:09:00,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1055 transitions. [2023-11-06 23:09:00,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:00,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1055 transitions. [2023-11-06 23:09:00,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 117.22222222222223) internal successors, (1055), 9 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states 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 23:09:00,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 23:09:00,855 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 23:09:00,855 INFO L175 Difference]: Start difference. First operand has 118 places, 245 transitions, 3651 flow. Second operand 9 states and 1055 transitions. [2023-11-06 23:09:00,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 331 transitions, 5182 flow [2023-11-06 23:09:00,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 331 transitions, 4870 flow, removed 126 selfloop flow, removed 2 redundant places. [2023-11-06 23:09:00,968 INFO L231 Difference]: Finished difference. Result has 128 places, 281 transitions, 4286 flow [2023-11-06 23:09:00,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=3339, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4286, PETRI_PLACES=128, PETRI_TRANSITIONS=281} [2023-11-06 23:09:00,969 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2023-11-06 23:09:00,970 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 281 transitions, 4286 flow [2023-11-06 23:09:00,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 111.6) internal successors, (1116), 10 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states 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 23:09:00,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:00,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:00,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:01,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 23:09:01,177 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:09:01,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:01,178 INFO L85 PathProgramCache]: Analyzing trace with hash 978113317, now seen corresponding path program 6 times [2023-11-06 23:09:01,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:01,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615123029] [2023-11-06 23:09:01,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:01,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:01,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:01,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615123029] [2023-11-06 23:09:01,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615123029] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:01,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118810617] [2023-11-06 23:09:01,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:09:01,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:01,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:01,503 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:01,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:09:01,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 23:09:01,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:01,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:09:01,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:01,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:04,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118810617] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:04,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:04,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-11-06 23:09:04,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678332944] [2023-11-06 23:09:04,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:04,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:09:04,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:04,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:09:04,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:09:04,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 240 [2023-11-06 23:09:04,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 281 transitions, 4286 flow. Second operand has 10 states, 10 states have (on average 111.6) internal successors, (1116), 10 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states 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 23:09:04,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:04,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 240 [2023-11-06 23:09:04,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:05,791 INFO L124 PetriNetUnfolderBase]: 3334/4812 cut-off events. [2023-11-06 23:09:05,791 INFO L125 PetriNetUnfolderBase]: For 62391/63320 co-relation queries the response was YES. [2023-11-06 23:09:05,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32023 conditions, 4812 events. 3334/4812 cut-off events. For 62391/63320 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 22864 event pairs, 770 based on Foata normal form. 204/4820 useless extension candidates. Maximal degree in co-relation 31974. Up to 4271 conditions per place. [2023-11-06 23:09:05,849 INFO L140 encePairwiseOnDemand]: 235/240 looper letters, 262 selfloop transitions, 66 changer transitions 2/348 dead transitions. [2023-11-06 23:09:05,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 348 transitions, 5595 flow [2023-11-06 23:09:05,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:09:05,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:09:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1053 transitions. [2023-11-06 23:09:05,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2023-11-06 23:09:05,854 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1053 transitions. [2023-11-06 23:09:05,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1053 transitions. [2023-11-06 23:09:05,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:05,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1053 transitions. [2023-11-06 23:09:05,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states 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 23:09:05,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 23:09:05,864 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 23:09:05,864 INFO L175 Difference]: Start difference. First operand has 128 places, 281 transitions, 4286 flow. Second operand 9 states and 1053 transitions. [2023-11-06 23:09:05,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 348 transitions, 5595 flow [2023-11-06 23:09:06,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 348 transitions, 5165 flow, removed 200 selfloop flow, removed 1 redundant places. [2023-11-06 23:09:06,031 INFO L231 Difference]: Finished difference. Result has 138 places, 300 transitions, 4491 flow [2023-11-06 23:09:06,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=3856, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4491, PETRI_PLACES=138, PETRI_TRANSITIONS=300} [2023-11-06 23:09:06,032 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2023-11-06 23:09:06,032 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 300 transitions, 4491 flow [2023-11-06 23:09:06,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 111.6) internal successors, (1116), 10 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states 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 23:09:06,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:06,033 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:06,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:06,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 23:09:06,241 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:09:06,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:06,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1814382998, now seen corresponding path program 7 times [2023-11-06 23:09:06,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:06,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594484852] [2023-11-06 23:09:06,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:06,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:06,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:06,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:06,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594484852] [2023-11-06 23:09:06,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594484852] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:06,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544824393] [2023-11-06 23:09:06,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:09:06,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:06,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:06,440 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:06,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:09:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:06,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:09:06,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:06,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:06,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544824393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:06,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:06,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-11-06 23:09:06,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785098556] [2023-11-06 23:09:06,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:06,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:09:06,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:06,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:09:06,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:09:06,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 240 [2023-11-06 23:09:06,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 300 transitions, 4491 flow. Second operand has 12 states, 12 states have (on average 108.83333333333333) internal successors, (1306), 12 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states 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 23:09:06,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:06,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 240 [2023-11-06 23:09:06,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:08,829 INFO L124 PetriNetUnfolderBase]: 5284/7568 cut-off events. [2023-11-06 23:09:08,829 INFO L125 PetriNetUnfolderBase]: For 92824/93025 co-relation queries the response was YES. [2023-11-06 23:09:08,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48131 conditions, 7568 events. 5284/7568 cut-off events. For 92824/93025 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 37513 event pairs, 490 based on Foata normal form. 131/7657 useless extension candidates. Maximal degree in co-relation 48078. Up to 2655 conditions per place. [2023-11-06 23:09:08,943 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 528 selfloop transitions, 150 changer transitions 0/682 dead transitions. [2023-11-06 23:09:08,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 682 transitions, 10897 flow [2023-11-06 23:09:08,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:09:08,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:09:08,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1498 transitions. [2023-11-06 23:09:08,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48012820512820514 [2023-11-06 23:09:08,948 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1498 transitions. [2023-11-06 23:09:08,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1498 transitions. [2023-11-06 23:09:08,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:08,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1498 transitions. [2023-11-06 23:09:08,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 115.23076923076923) internal successors, (1498), 13 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states 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 23:09:08,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 240.0) internal successors, (3360), 14 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states 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 23:09:08,959 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 240.0) internal successors, (3360), 14 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states 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 23:09:08,960 INFO L175 Difference]: Start difference. First operand has 138 places, 300 transitions, 4491 flow. Second operand 13 states and 1498 transitions. [2023-11-06 23:09:08,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 682 transitions, 10897 flow [2023-11-06 23:09:09,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 682 transitions, 9918 flow, removed 460 selfloop flow, removed 2 redundant places. [2023-11-06 23:09:09,204 INFO L231 Difference]: Finished difference. Result has 156 places, 378 transitions, 5785 flow [2023-11-06 23:09:09,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=4111, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5785, PETRI_PLACES=156, PETRI_TRANSITIONS=378} [2023-11-06 23:09:09,205 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2023-11-06 23:09:09,205 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 378 transitions, 5785 flow [2023-11-06 23:09:09,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 108.83333333333333) internal successors, (1306), 12 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states 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 23:09:09,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:09,205 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:09,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:09,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 23:09:09,407 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:09:09,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:09,408 INFO L85 PathProgramCache]: Analyzing trace with hash 116320298, now seen corresponding path program 8 times [2023-11-06 23:09:09,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:09,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986229928] [2023-11-06 23:09:09,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:09,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:09,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:09,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986229928] [2023-11-06 23:09:09,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986229928] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:09,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026165918] [2023-11-06 23:09:09,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:09:09,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:09,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:09,656 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:09,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:09:09,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:09:09,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:09,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:09:09,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:09,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:09,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026165918] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:09,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:09,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-06 23:09:09,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206851412] [2023-11-06 23:09:09,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:09,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 23:09:09,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:09,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 23:09:09,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:09:10,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 240 [2023-11-06 23:09:10,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 378 transitions, 5785 flow. Second operand has 16 states, 16 states have (on average 106.0625) internal successors, (1697), 16 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states 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 23:09:10,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:10,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 240 [2023-11-06 23:09:10,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:12,523 INFO L124 PetriNetUnfolderBase]: 6020/8500 cut-off events. [2023-11-06 23:09:12,523 INFO L125 PetriNetUnfolderBase]: For 127438/127755 co-relation queries the response was YES. [2023-11-06 23:09:12,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59115 conditions, 8500 events. 6020/8500 cut-off events. For 127438/127755 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 41337 event pairs, 1538 based on Foata normal form. 157/8587 useless extension candidates. Maximal degree in co-relation 59053. Up to 6168 conditions per place. [2023-11-06 23:09:12,606 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 423 selfloop transitions, 263 changer transitions 0/690 dead transitions. [2023-11-06 23:09:12,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 690 transitions, 11190 flow [2023-11-06 23:09:12,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 23:09:12,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 23:09:12,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1918 transitions. [2023-11-06 23:09:12,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47009803921568627 [2023-11-06 23:09:12,612 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1918 transitions. [2023-11-06 23:09:12,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1918 transitions. [2023-11-06 23:09:12,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:12,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1918 transitions. [2023-11-06 23:09:12,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 112.82352941176471) internal successors, (1918), 17 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states 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 23:09:12,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 240.0) internal successors, (4320), 18 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states 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 23:09:12,625 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 240.0) internal successors, (4320), 18 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states 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 23:09:12,626 INFO L175 Difference]: Start difference. First operand has 156 places, 378 transitions, 5785 flow. Second operand 17 states and 1918 transitions. [2023-11-06 23:09:12,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 690 transitions, 11190 flow [2023-11-06 23:09:13,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 690 transitions, 10613 flow, removed 261 selfloop flow, removed 1 redundant places. [2023-11-06 23:09:13,138 INFO L231 Difference]: Finished difference. Result has 176 places, 515 transitions, 8198 flow [2023-11-06 23:09:13,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=5406, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8198, PETRI_PLACES=176, PETRI_TRANSITIONS=515} [2023-11-06 23:09:13,139 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2023-11-06 23:09:13,139 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 515 transitions, 8198 flow [2023-11-06 23:09:13,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 106.0625) internal successors, (1697), 16 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states 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 23:09:13,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:13,140 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:13,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:13,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 23:09:13,345 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:09:13,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:13,346 INFO L85 PathProgramCache]: Analyzing trace with hash -137087756, now seen corresponding path program 9 times [2023-11-06 23:09:13,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:13,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089841762] [2023-11-06 23:09:13,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:13,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:13,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:13,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089841762] [2023-11-06 23:09:13,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089841762] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:13,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933737014] [2023-11-06 23:09:13,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:09:13,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:13,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:13,582 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:13,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:09:13,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 23:09:13,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:13,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:09:13,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:13,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:13,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933737014] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:13,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:13,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2023-11-06 23:09:13,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483579190] [2023-11-06 23:09:13,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:13,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 23:09:13,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:13,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 23:09:13,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:09:14,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 240 [2023-11-06 23:09:14,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 515 transitions, 8198 flow. Second operand has 17 states, 17 states have (on average 102.3529411764706) internal successors, (1740), 17 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 23:09:14,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:14,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 240 [2023-11-06 23:09:14,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:20,637 INFO L124 PetriNetUnfolderBase]: 8629/11916 cut-off events. [2023-11-06 23:09:20,637 INFO L125 PetriNetUnfolderBase]: For 208247/208247 co-relation queries the response was YES. [2023-11-06 23:09:20,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92616 conditions, 11916 events. 8629/11916 cut-off events. For 208247/208247 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 58309 event pairs, 1030 based on Foata normal form. 374/12290 useless extension candidates. Maximal degree in co-relation 92548. Up to 5309 conditions per place. [2023-11-06 23:09:20,815 INFO L140 encePairwiseOnDemand]: 231/240 looper letters, 544 selfloop transitions, 1049 changer transitions 0/1593 dead transitions. [2023-11-06 23:09:20,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 1593 transitions, 29200 flow [2023-11-06 23:09:20,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-06 23:09:20,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-11-06 23:09:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 8468 transitions. [2023-11-06 23:09:20,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44662447257383964 [2023-11-06 23:09:20,835 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 8468 transitions. [2023-11-06 23:09:20,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 8468 transitions. [2023-11-06 23:09:20,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:20,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 8468 transitions. [2023-11-06 23:09:20,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 107.18987341772151) internal successors, (8468), 79 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states 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 23:09:20,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 240.0) internal successors, (19200), 80 states have internal predecessors, (19200), 0 states have call successors, (0), 0 states 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 23:09:20,894 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 240.0) internal successors, (19200), 80 states have internal predecessors, (19200), 0 states have call successors, (0), 0 states 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 23:09:20,894 INFO L175 Difference]: Start difference. First operand has 176 places, 515 transitions, 8198 flow. Second operand 79 states and 8468 transitions. [2023-11-06 23:09:20,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 1593 transitions, 29200 flow [2023-11-06 23:09:23,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 1593 transitions, 26380 flow, removed 1086 selfloop flow, removed 5 redundant places. [2023-11-06 23:09:23,422 INFO L231 Difference]: Finished difference. Result has 302 places, 1316 transitions, 24965 flow [2023-11-06 23:09:23,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=7373, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=24965, PETRI_PLACES=302, PETRI_TRANSITIONS=1316} [2023-11-06 23:09:23,424 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2023-11-06 23:09:23,424 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 1316 transitions, 24965 flow [2023-11-06 23:09:23,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 102.3529411764706) internal successors, (1740), 17 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 23:09:23,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:23,425 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:23,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:23,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 23:09:23,631 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:09:23,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:23,631 INFO L85 PathProgramCache]: Analyzing trace with hash -977532600, now seen corresponding path program 10 times [2023-11-06 23:09:23,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:23,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414150084] [2023-11-06 23:09:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:23,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:23,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:23,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414150084] [2023-11-06 23:09:23,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414150084] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:23,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24216509] [2023-11-06 23:09:23,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:09:23,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:23,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:23,882 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:23,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:09:24,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:09:24,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:24,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:09:24,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:24,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:24,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24216509] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:24,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:24,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2023-11-06 23:09:24,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783503834] [2023-11-06 23:09:24,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:24,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 23:09:24,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:24,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 23:09:24,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:09:24,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 240 [2023-11-06 23:09:24,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 1316 transitions, 24965 flow. Second operand has 13 states, 13 states have (on average 104.07692307692308) internal successors, (1353), 13 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states 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 23:09:24,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:24,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 240 [2023-11-06 23:09:24,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:33,456 INFO L124 PetriNetUnfolderBase]: 9510/13359 cut-off events. [2023-11-06 23:09:33,457 INFO L125 PetriNetUnfolderBase]: For 301489/301489 co-relation queries the response was YES. [2023-11-06 23:09:33,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117797 conditions, 13359 events. 9510/13359 cut-off events. For 301489/301489 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 69384 event pairs, 1071 based on Foata normal form. 424/13783 useless extension candidates. Maximal degree in co-relation 117675. Up to 4781 conditions per place. [2023-11-06 23:09:33,756 INFO L140 encePairwiseOnDemand]: 231/240 looper letters, 751 selfloop transitions, 818 changer transitions 100/1669 dead transitions. [2023-11-06 23:09:33,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 1669 transitions, 33338 flow [2023-11-06 23:09:33,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 23:09:33,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 23:09:33,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3718 transitions. [2023-11-06 23:09:33,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4556372549019608 [2023-11-06 23:09:33,767 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3718 transitions. [2023-11-06 23:09:33,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3718 transitions. [2023-11-06 23:09:33,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:33,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3718 transitions. [2023-11-06 23:09:33,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 109.3529411764706) internal successors, (3718), 34 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states 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 23:09:33,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 240.0) internal successors, (8400), 35 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states 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 23:09:33,791 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 240.0) internal successors, (8400), 35 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states 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 23:09:33,791 INFO L175 Difference]: Start difference. First operand has 302 places, 1316 transitions, 24965 flow. Second operand 34 states and 3718 transitions. [2023-11-06 23:09:33,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 1669 transitions, 33338 flow [2023-11-06 23:09:37,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1669 transitions, 26074 flow, removed 3409 selfloop flow, removed 5 redundant places. [2023-11-06 23:09:37,304 INFO L231 Difference]: Finished difference. Result has 350 places, 1383 transitions, 22156 flow [2023-11-06 23:09:37,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=17897, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=689, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=22156, PETRI_PLACES=350, PETRI_TRANSITIONS=1383} [2023-11-06 23:09:37,305 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2023-11-06 23:09:37,305 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 1383 transitions, 22156 flow [2023-11-06 23:09:37,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 104.07692307692308) internal successors, (1353), 13 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states 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 23:09:37,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:37,306 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:37,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:37,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:37,506 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:09:37,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:37,507 INFO L85 PathProgramCache]: Analyzing trace with hash 359439958, now seen corresponding path program 11 times [2023-11-06 23:09:37,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:37,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324892346] [2023-11-06 23:09:37,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:37,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:37,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:37,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324892346] [2023-11-06 23:09:37,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324892346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:37,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024218993] [2023-11-06 23:09:37,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:09:37,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:37,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:37,728 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:37,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:09:37,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:09:37,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:37,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:09:37,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:37,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:38,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024218993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:38,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:38,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2023-11-06 23:09:38,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229463993] [2023-11-06 23:09:38,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:38,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:09:38,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:38,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:09:38,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:09:38,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 240 [2023-11-06 23:09:38,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 1383 transitions, 22156 flow. Second operand has 12 states, 12 states have (on average 103.83333333333333) internal successors, (1246), 12 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states 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 23:09:38,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:38,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 240 [2023-11-06 23:09:38,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:46,106 INFO L124 PetriNetUnfolderBase]: 10598/14935 cut-off events. [2023-11-06 23:09:46,106 INFO L125 PetriNetUnfolderBase]: For 330918/330918 co-relation queries the response was YES. [2023-11-06 23:09:46,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129321 conditions, 14935 events. 10598/14935 cut-off events. For 330918/330918 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 79747 event pairs, 1549 based on Foata normal form. 136/15071 useless extension candidates. Maximal degree in co-relation 129181. Up to 7542 conditions per place. [2023-11-06 23:09:46,415 INFO L140 encePairwiseOnDemand]: 232/240 looper letters, 1409 selfloop transitions, 482 changer transitions 122/2013 dead transitions. [2023-11-06 23:09:46,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 2013 transitions, 37589 flow [2023-11-06 23:09:46,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:09:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:09:46,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1425 transitions. [2023-11-06 23:09:46,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567307692307692 [2023-11-06 23:09:46,418 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1425 transitions. [2023-11-06 23:09:46,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1425 transitions. [2023-11-06 23:09:46,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:46,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1425 transitions. [2023-11-06 23:09:46,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 109.61538461538461) internal successors, (1425), 13 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states 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 23:09:46,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 240.0) internal successors, (3360), 14 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states 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 23:09:46,426 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 240.0) internal successors, (3360), 14 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states 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 23:09:46,426 INFO L175 Difference]: Start difference. First operand has 350 places, 1383 transitions, 22156 flow. Second operand 13 states and 1425 transitions. [2023-11-06 23:09:46,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 2013 transitions, 37589 flow [2023-11-06 23:09:50,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 2013 transitions, 35720 flow, removed 298 selfloop flow, removed 13 redundant places. [2023-11-06 23:09:50,463 INFO L231 Difference]: Finished difference. Result has 353 places, 1523 transitions, 24990 flow [2023-11-06 23:09:50,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=20770, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=938, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=24990, PETRI_PLACES=353, PETRI_TRANSITIONS=1523} [2023-11-06 23:09:50,464 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2023-11-06 23:09:50,464 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 1523 transitions, 24990 flow [2023-11-06 23:09:50,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 103.83333333333333) internal successors, (1246), 12 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states 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 23:09:50,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:50,465 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:50,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:50,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:50,671 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:09:50,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:50,672 INFO L85 PathProgramCache]: Analyzing trace with hash -482302536, now seen corresponding path program 12 times [2023-11-06 23:09:50,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:50,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187437206] [2023-11-06 23:09:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:50,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:50,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:50,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187437206] [2023-11-06 23:09:50,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187437206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:50,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395833059] [2023-11-06 23:09:50,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:09:50,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:50,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:50,848 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:50,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:09:50,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 23:09:50,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:50,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:09:50,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:51,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:51,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395833059] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:51,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:51,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-06 23:09:51,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367084993] [2023-11-06 23:09:51,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:51,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 23:09:51,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:51,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 23:09:51,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:09:51,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 240 [2023-11-06 23:09:51,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1523 transitions, 24990 flow. Second operand has 16 states, 16 states have (on average 102.9375) internal successors, (1647), 16 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states 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 23:09:51,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:51,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 240 [2023-11-06 23:09:51,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:01,042 INFO L124 PetriNetUnfolderBase]: 11332/15843 cut-off events. [2023-11-06 23:10:01,042 INFO L125 PetriNetUnfolderBase]: For 373958/373958 co-relation queries the response was YES. [2023-11-06 23:10:01,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148515 conditions, 15843 events. 11332/15843 cut-off events. For 373958/373958 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 83927 event pairs, 376 based on Foata normal form. 526/16361 useless extension candidates. Maximal degree in co-relation 148375. Up to 4281 conditions per place. [2023-11-06 23:10:01,343 INFO L140 encePairwiseOnDemand]: 231/240 looper letters, 1127 selfloop transitions, 1040 changer transitions 96/2263 dead transitions. [2023-11-06 23:10:01,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 2263 transitions, 42954 flow [2023-11-06 23:10:01,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-06 23:10:01,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-06 23:10:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4562 transitions. [2023-11-06 23:10:01,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525793650793651 [2023-11-06 23:10:01,350 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4562 transitions. [2023-11-06 23:10:01,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4562 transitions. [2023-11-06 23:10:01,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:01,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4562 transitions. [2023-11-06 23:10:01,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 108.61904761904762) internal successors, (4562), 42 states have internal predecessors, (4562), 0 states have call successors, (0), 0 states 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 23:10:01,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 240.0) internal successors, (10320), 43 states have internal predecessors, (10320), 0 states have call successors, (0), 0 states 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 23:10:01,369 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 240.0) internal successors, (10320), 43 states have internal predecessors, (10320), 0 states have call successors, (0), 0 states 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 23:10:01,370 INFO L175 Difference]: Start difference. First operand has 353 places, 1523 transitions, 24990 flow. Second operand 42 states and 4562 transitions. [2023-11-06 23:10:01,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 2263 transitions, 42954 flow [2023-11-06 23:10:06,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 2263 transitions, 41181 flow, removed 614 selfloop flow, removed 4 redundant places. [2023-11-06 23:10:06,983 INFO L231 Difference]: Finished difference. Result has 411 places, 1697 transitions, 31358 flow [2023-11-06 23:10:06,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=22940, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=736, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=31358, PETRI_PLACES=411, PETRI_TRANSITIONS=1697} [2023-11-06 23:10:06,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2023-11-06 23:10:06,986 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 1697 transitions, 31358 flow [2023-11-06 23:10:06,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 102.9375) internal successors, (1647), 16 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states 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 23:10:06,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:06,986 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:06,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:07,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:07,192 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:10:07,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:07,192 INFO L85 PathProgramCache]: Analyzing trace with hash -658345468, now seen corresponding path program 13 times [2023-11-06 23:10:07,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:07,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562444232] [2023-11-06 23:10:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:07,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:07,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:07,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562444232] [2023-11-06 23:10:07,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562444232] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:07,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388028253] [2023-11-06 23:10:07,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:10:07,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:07,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:07,361 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:07,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:10:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:07,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:10:07,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:10:07,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:10:07,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388028253] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:07,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:07,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-11-06 23:10:07,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509390615] [2023-11-06 23:10:07,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:07,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:10:07,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:07,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:10:07,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:10:07,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 240 [2023-11-06 23:10:07,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 1697 transitions, 31358 flow. Second operand has 15 states, 15 states have (on average 102.86666666666666) internal successors, (1543), 15 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states 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 23:10:07,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:07,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 240 [2023-11-06 23:10:07,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:20,245 INFO L124 PetriNetUnfolderBase]: 13231/18422 cut-off events. [2023-11-06 23:10:20,245 INFO L125 PetriNetUnfolderBase]: For 516689/516689 co-relation queries the response was YES. [2023-11-06 23:10:20,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185994 conditions, 18422 events. 13231/18422 cut-off events. For 516689/516689 co-relation queries the response was YES. Maximal size of possible extension queue 821. Compared 99774 event pairs, 485 based on Foata normal form. 536/18958 useless extension candidates. Maximal degree in co-relation 185834. Up to 5781 conditions per place. [2023-11-06 23:10:20,640 INFO L140 encePairwiseOnDemand]: 231/240 looper letters, 1619 selfloop transitions, 1170 changer transitions 69/2858 dead transitions. [2023-11-06 23:10:20,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 2858 transitions, 60985 flow [2023-11-06 23:10:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-06 23:10:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-06 23:10:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 5302 transitions. [2023-11-06 23:10:20,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4508503401360544 [2023-11-06 23:10:20,654 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 5302 transitions. [2023-11-06 23:10:20,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 5302 transitions. [2023-11-06 23:10:20,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:20,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 5302 transitions. [2023-11-06 23:10:20,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 108.20408163265306) internal successors, (5302), 49 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states 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 23:10:20,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 240.0) internal successors, (12000), 50 states have internal predecessors, (12000), 0 states have call successors, (0), 0 states 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 23:10:20,676 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 240.0) internal successors, (12000), 50 states have internal predecessors, (12000), 0 states have call successors, (0), 0 states 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 23:10:20,676 INFO L175 Difference]: Start difference. First operand has 411 places, 1697 transitions, 31358 flow. Second operand 49 states and 5302 transitions. [2023-11-06 23:10:20,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 2858 transitions, 60985 flow [2023-11-06 23:10:27,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 2858 transitions, 56399 flow, removed 1444 selfloop flow, removed 25 redundant places. [2023-11-06 23:10:27,484 INFO L231 Difference]: Finished difference. Result has 470 places, 2133 transitions, 43126 flow [2023-11-06 23:10:27,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=28106, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=761, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=893, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=43126, PETRI_PLACES=470, PETRI_TRANSITIONS=2133} [2023-11-06 23:10:27,486 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2023-11-06 23:10:27,486 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 2133 transitions, 43126 flow [2023-11-06 23:10:27,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 102.86666666666666) internal successors, (1543), 15 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states 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 23:10:27,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:27,486 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:27,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:27,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:27,687 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:10:27,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:27,687 INFO L85 PathProgramCache]: Analyzing trace with hash 983407550, now seen corresponding path program 14 times [2023-11-06 23:10:27,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:27,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620046772] [2023-11-06 23:10:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:27,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:27,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:27,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620046772] [2023-11-06 23:10:27,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620046772] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:27,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600261683] [2023-11-06 23:10:27,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:10:27,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:27,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:27,892 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:27,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:10:28,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:10:28,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:28,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:10:28,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:28,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:28,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600261683] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:28,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:28,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-11-06 23:10:28,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141245768] [2023-11-06 23:10:28,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:28,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 23:10:28,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:28,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 23:10:28,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:10:28,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 240 [2023-11-06 23:10:28,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 2133 transitions, 43126 flow. Second operand has 16 states, 16 states have (on average 103.625) internal successors, (1658), 16 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states 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 23:10:28,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:28,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 240 [2023-11-06 23:10:28,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:43,813 INFO L124 PetriNetUnfolderBase]: 13449/18818 cut-off events. [2023-11-06 23:10:43,813 INFO L125 PetriNetUnfolderBase]: For 652415/652415 co-relation queries the response was YES. [2023-11-06 23:10:44,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198068 conditions, 18818 events. 13449/18818 cut-off events. For 652415/652415 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 103054 event pairs, 1603 based on Foata normal form. 320/19138 useless extension candidates. Maximal degree in co-relation 197880. Up to 8301 conditions per place. [2023-11-06 23:10:44,365 INFO L140 encePairwiseOnDemand]: 231/240 looper letters, 1047 selfloop transitions, 1391 changer transitions 56/2494 dead transitions. [2023-11-06 23:10:44,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 2494 transitions, 54497 flow [2023-11-06 23:10:44,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-06 23:10:44,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-11-06 23:10:44,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 5414 transitions. [2023-11-06 23:10:44,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45116666666666666 [2023-11-06 23:10:44,374 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 5414 transitions. [2023-11-06 23:10:44,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 5414 transitions. [2023-11-06 23:10:44,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:44,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 5414 transitions. [2023-11-06 23:10:44,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 108.28) internal successors, (5414), 50 states have internal predecessors, (5414), 0 states have call successors, (0), 0 states 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 23:10:44,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 240.0) internal successors, (12240), 51 states have internal predecessors, (12240), 0 states have call successors, (0), 0 states 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 23:10:44,404 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 240.0) internal successors, (12240), 51 states have internal predecessors, (12240), 0 states have call successors, (0), 0 states 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 23:10:44,404 INFO L175 Difference]: Start difference. First operand has 470 places, 2133 transitions, 43126 flow. Second operand 50 states and 5414 transitions. [2023-11-06 23:10:44,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 2494 transitions, 54497 flow [2023-11-06 23:10:54,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 2494 transitions, 49594 flow, removed 2275 selfloop flow, removed 6 redundant places. [2023-11-06 23:10:54,655 INFO L231 Difference]: Finished difference. Result has 521 places, 2162 transitions, 43020 flow [2023-11-06 23:10:54,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=38971, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=768, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=43020, PETRI_PLACES=521, PETRI_TRANSITIONS=2162} [2023-11-06 23:10:54,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 479 predicate places. [2023-11-06 23:10:54,658 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 2162 transitions, 43020 flow [2023-11-06 23:10:54,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 103.625) internal successors, (1658), 16 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states 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 23:10:54,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:54,659 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:54,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-06 23:10:54,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:54,865 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:10:54,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:54,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1053596792, now seen corresponding path program 15 times [2023-11-06 23:10:54,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:54,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876373068] [2023-11-06 23:10:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:54,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:10:55,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:55,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876373068] [2023-11-06 23:10:55,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876373068] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:55,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912093643] [2023-11-06 23:10:55,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:10:55,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:55,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:55,051 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:55,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa9e97f-a64e-4b0a-bc59-2817aedbc782/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 23:10:55,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:10:55,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:55,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:10:55,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:10:55,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:10:55,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912093643] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:55,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:55,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-11-06 23:10:55,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711584426] [2023-11-06 23:10:55,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:55,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:10:55,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:55,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:10:55,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:10:55,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 240 [2023-11-06 23:10:55,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 2162 transitions, 43020 flow. Second operand has 15 states, 15 states have (on average 106.33333333333333) internal successors, (1595), 15 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states 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 23:10:55,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:55,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 240 [2023-11-06 23:10:55,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand