./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/bench-exp1x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/bench-exp1x3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52eeb5cce5645e9dacc261319eae3d665b5cc432ff3ddd2ef39502a44996e68d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:11:35,401 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:11:35,464 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 00:11:35,468 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:11:35,469 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:11:35,489 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:11:35,489 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:11:35,490 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:11:35,491 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:11:35,491 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:11:35,492 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:11:35,492 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:11:35,493 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:11:35,494 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:11:35,494 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:11:35,495 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:11:35,495 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:11:35,496 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:11:35,496 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:11:35,497 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:11:35,497 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:11:35,500 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:11:35,501 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:11:35,501 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:11:35,502 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:11:35,502 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:11:35,503 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:11:35,503 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:11:35,504 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:11:35,504 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:11:35,505 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:11:35,505 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:11:35,505 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:11:35,506 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:11:35,506 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:11:35,506 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:11:35,506 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:11:35,506 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:11:35,506 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:11:35,507 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:11:35,507 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:11:35,507 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_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52eeb5cce5645e9dacc261319eae3d665b5cc432ff3ddd2ef39502a44996e68d [2023-11-29 00:11:35,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:11:35,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:11:35,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:11:35,730 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:11:35,731 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:11:35,732 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/bench-exp1x3.wvr.c [2023-11-29 00:11:38,515 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:11:38,685 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:11:38,685 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/sv-benchmarks/c/weaver/bench-exp1x3.wvr.c [2023-11-29 00:11:38,694 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/data/97042f554/220d0be546334b94bdd69c6e84fbfb0a/FLAG9ba83e8d4 [2023-11-29 00:11:38,711 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/data/97042f554/220d0be546334b94bdd69c6e84fbfb0a [2023-11-29 00:11:38,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:11:38,715 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:11:38,716 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:11:38,716 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:11:38,720 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:11:38,721 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:11:38" (1/1) ... [2023-11-29 00:11:38,722 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36cbc905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:38, skipping insertion in model container [2023-11-29 00:11:38,722 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:11:38" (1/1) ... [2023-11-29 00:11:38,746 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:11:38,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:11:38,932 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:11:38,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:11:38,967 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:11:38,968 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:38 WrapperNode [2023-11-29 00:11:38,968 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:11:38,969 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:11:38,969 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:11:38,969 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:11:38,977 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:38" (1/1) ... [2023-11-29 00:11:38,985 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:38" (1/1) ... [2023-11-29 00:11:39,005 INFO L138 Inliner]: procedures = 18, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 61 [2023-11-29 00:11:39,005 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:11:39,006 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:11:39,006 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:11:39,006 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:11:39,017 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:38" (1/1) ... [2023-11-29 00:11:39,017 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:38" (1/1) ... [2023-11-29 00:11:39,020 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:38" (1/1) ... [2023-11-29 00:11:39,034 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-29 00:11:39,035 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:38" (1/1) ... [2023-11-29 00:11:39,035 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:38" (1/1) ... [2023-11-29 00:11:39,041 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:38" (1/1) ... [2023-11-29 00:11:39,044 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:38" (1/1) ... [2023-11-29 00:11:39,046 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:38" (1/1) ... [2023-11-29 00:11:39,047 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:38" (1/1) ... [2023-11-29 00:11:39,050 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:11:39,051 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:11:39,051 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:11:39,051 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:11:39,052 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:38" (1/1) ... [2023-11-29 00:11:39,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:11:39,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:11:39,081 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:11:39,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:11:39,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:11:39,114 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 00:11:39,114 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 00:11:39,114 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 00:11:39,115 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 00:11:39,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:11:39,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:11:39,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:11:39,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:11:39,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:11:39,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:11:39,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:11:39,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:11:39,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:11:39,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:11:39,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:11:39,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:11:39,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:11:39,119 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 00:11:39,218 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:11:39,220 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:11:39,391 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:11:39,503 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:11:39,504 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 00:11:39,504 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:11:39 BoogieIcfgContainer [2023-11-29 00:11:39,504 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:11:39,506 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:11:39,507 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:11:39,510 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:11:39,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:11:38" (1/3) ... [2023-11-29 00:11:39,511 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67abe0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:11:39, skipping insertion in model container [2023-11-29 00:11:39,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:38" (2/3) ... [2023-11-29 00:11:39,512 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67abe0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:11:39, skipping insertion in model container [2023-11-29 00:11:39,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:11:39" (3/3) ... [2023-11-29 00:11:39,513 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp1x3.wvr.c [2023-11-29 00:11:39,532 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:11:39,533 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-29 00:11:39,533 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:11:39,572 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 00:11:39,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 33 transitions, 80 flow [2023-11-29 00:11:39,634 INFO L124 PetriNetUnfolderBase]: 2/31 cut-off events. [2023-11-29 00:11:39,634 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:11:39,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 2/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2023-11-29 00:11:39,637 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 33 transitions, 80 flow [2023-11-29 00:11:39,641 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 30 transitions, 72 flow [2023-11-29 00:11:39,652 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:11:39,660 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;@1ce03221, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:11:39,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-29 00:11:39,663 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:11:39,663 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 00:11:39,663 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:11:39,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:39,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 00:11:39,665 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 00:11:39,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:39,670 INFO L85 PathProgramCache]: Analyzing trace with hash 7843, now seen corresponding path program 1 times [2023-11-29 00:11:39,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:39,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715266627] [2023-11-29 00:11:39,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:39,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:39,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:39,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715266627] [2023-11-29 00:11:39,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715266627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:11:39,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:11:39,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:11:39,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660960309] [2023-11-29 00:11:39,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:11:39,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:11:39,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:39,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:11:39,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:11:40,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 33 [2023-11-29 00:11:40,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:11:40,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 33 [2023-11-29 00:11:40,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:40,067 INFO L124 PetriNetUnfolderBase]: 68/134 cut-off events. [2023-11-29 00:11:40,067 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-29 00:11:40,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 134 events. 68/134 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 366 event pairs, 29 based on Foata normal form. 1/87 useless extension candidates. Maximal degree in co-relation 207. Up to 105 conditions per place. [2023-11-29 00:11:40,071 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 13 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-11-29 00:11:40,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 26 transitions, 92 flow [2023-11-29 00:11:40,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:11:40,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:11:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2023-11-29 00:11:40,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6262626262626263 [2023-11-29 00:11:40,082 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 62 transitions. [2023-11-29 00:11:40,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 62 transitions. [2023-11-29 00:11:40,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:40,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 62 transitions. [2023-11-29 00:11:40,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,092 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,094 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 72 flow. Second operand 3 states and 62 transitions. [2023-11-29 00:11:40,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 26 transitions, 92 flow [2023-11-29 00:11:40,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 00:11:40,100 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 58 flow [2023-11-29 00:11:40,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, 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=58, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2023-11-29 00:11:40,106 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -6 predicate places. [2023-11-29 00:11:40,106 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 58 flow [2023-11-29 00:11:40,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:40,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 00:11:40,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:11:40,107 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 00:11:40,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:40,108 INFO L85 PathProgramCache]: Analyzing trace with hash 7844, now seen corresponding path program 1 times [2023-11-29 00:11:40,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:40,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287017473] [2023-11-29 00:11:40,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:40,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:40,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:40,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287017473] [2023-11-29 00:11:40,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287017473] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:11:40,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:11:40,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:11:40,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259010108] [2023-11-29 00:11:40,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:11:40,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:11:40,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:40,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:11:40,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:11:40,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 33 [2023-11-29 00:11:40,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:11:40,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 33 [2023-11-29 00:11:40,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:40,318 INFO L124 PetriNetUnfolderBase]: 44/96 cut-off events. [2023-11-29 00:11:40,329 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-29 00:11:40,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 96 events. 44/96 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 243 event pairs, 17 based on Foata normal form. 10/72 useless extension candidates. Maximal degree in co-relation 169. Up to 71 conditions per place. [2023-11-29 00:11:40,331 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 11 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-11-29 00:11:40,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 78 flow [2023-11-29 00:11:40,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:11:40,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:11:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2023-11-29 00:11:40,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6565656565656566 [2023-11-29 00:11:40,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2023-11-29 00:11:40,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2023-11-29 00:11:40,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:40,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2023-11-29 00:11:40,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,336 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 58 flow. Second operand 3 states and 65 transitions. [2023-11-29 00:11:40,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 78 flow [2023-11-29 00:11:40,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 77 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:11:40,338 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 55 flow [2023-11-29 00:11:40,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, 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=55, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-11-29 00:11:40,339 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -7 predicate places. [2023-11-29 00:11:40,339 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 55 flow [2023-11-29 00:11:40,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:40,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 00:11:40,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:11:40,341 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 00:11:40,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:40,341 INFO L85 PathProgramCache]: Analyzing trace with hash 233846432, now seen corresponding path program 1 times [2023-11-29 00:11:40,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:40,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475916217] [2023-11-29 00:11:40,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:40,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:40,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:40,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475916217] [2023-11-29 00:11:40,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475916217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:11:40,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:11:40,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:11:40,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279892042] [2023-11-29 00:11:40,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:11:40,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:11:40,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:40,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:11:40,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:11:40,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 33 [2023-11-29 00:11:40,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 55 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:11:40,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 33 [2023-11-29 00:11:40,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:40,465 INFO L124 PetriNetUnfolderBase]: 48/98 cut-off events. [2023-11-29 00:11:40,465 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 00:11:40,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 98 events. 48/98 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 238 event pairs, 20 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 180. Up to 80 conditions per place. [2023-11-29 00:11:40,467 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 13 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-11-29 00:11:40,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 22 transitions, 79 flow [2023-11-29 00:11:40,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:11:40,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:11:40,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2023-11-29 00:11:40,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6161616161616161 [2023-11-29 00:11:40,469 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 61 transitions. [2023-11-29 00:11:40,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 61 transitions. [2023-11-29 00:11:40,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:40,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 61 transitions. [2023-11-29 00:11:40,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,471 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,471 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 55 flow. Second operand 3 states and 61 transitions. [2023-11-29 00:11:40,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 22 transitions, 79 flow [2023-11-29 00:11:40,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 22 transitions, 78 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:11:40,473 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 52 flow [2023-11-29 00:11:40,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=25, 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=52, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-11-29 00:11:40,474 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -8 predicate places. [2023-11-29 00:11:40,474 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 52 flow [2023-11-29 00:11:40,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:40,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 00:11:40,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:11:40,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 00:11:40,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:40,476 INFO L85 PathProgramCache]: Analyzing trace with hash 233846433, now seen corresponding path program 1 times [2023-11-29 00:11:40,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:40,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403118389] [2023-11-29 00:11:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:40,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:40,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:40,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403118389] [2023-11-29 00:11:40,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403118389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:11:40,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:11:40,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:11:40,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297330107] [2023-11-29 00:11:40,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:11:40,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:11:40,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:40,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:11:40,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:11:40,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 33 [2023-11-29 00:11:40,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:11:40,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 33 [2023-11-29 00:11:40,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:40,600 INFO L124 PetriNetUnfolderBase]: 44/88 cut-off events. [2023-11-29 00:11:40,600 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-29 00:11:40,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 88 events. 44/88 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 209 event pairs, 17 based on Foata normal form. 6/68 useless extension candidates. Maximal degree in co-relation 161. Up to 71 conditions per place. [2023-11-29 00:11:40,601 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 11 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-11-29 00:11:40,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 20 transitions, 72 flow [2023-11-29 00:11:40,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:11:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:11:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2023-11-29 00:11:40,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6565656565656566 [2023-11-29 00:11:40,603 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2023-11-29 00:11:40,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2023-11-29 00:11:40,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:40,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2023-11-29 00:11:40,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,606 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,606 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 52 flow. Second operand 3 states and 65 transitions. [2023-11-29 00:11:40,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 20 transitions, 72 flow [2023-11-29 00:11:40,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 20 transitions, 71 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:11:40,607 INFO L231 Difference]: Finished difference. Result has 26 places, 20 transitions, 49 flow [2023-11-29 00:11:40,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=49, PETRI_PLACES=26, PETRI_TRANSITIONS=20} [2023-11-29 00:11:40,609 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -9 predicate places. [2023-11-29 00:11:40,609 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 20 transitions, 49 flow [2023-11-29 00:11:40,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:40,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:11:40,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 00:11:40,610 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 00:11:40,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:40,610 INFO L85 PathProgramCache]: Analyzing trace with hash -434464102, now seen corresponding path program 1 times [2023-11-29 00:11:40,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:40,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531072893] [2023-11-29 00:11:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:40,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:40,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:40,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531072893] [2023-11-29 00:11:40,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531072893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:11:40,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:11:40,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:11:40,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318297348] [2023-11-29 00:11:40,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:11:40,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:11:40,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:40,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:11:40,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:11:40,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 00:11:40,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 20 transitions, 49 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:11:40,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 00:11:40,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:40,756 INFO L124 PetriNetUnfolderBase]: 59/121 cut-off events. [2023-11-29 00:11:40,757 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-29 00:11:40,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 121 events. 59/121 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 339 event pairs, 8 based on Foata normal form. 1/87 useless extension candidates. Maximal degree in co-relation 224. Up to 77 conditions per place. [2023-11-29 00:11:40,759 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 17 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2023-11-29 00:11:40,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 29 transitions, 112 flow [2023-11-29 00:11:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:11:40,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:11:40,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2023-11-29 00:11:40,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.797979797979798 [2023-11-29 00:11:40,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 79 transitions. [2023-11-29 00:11:40,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 79 transitions. [2023-11-29 00:11:40,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:40,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 79 transitions. [2023-11-29 00:11:40,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,763 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,763 INFO L175 Difference]: Start difference. First operand has 26 places, 20 transitions, 49 flow. Second operand 3 states and 79 transitions. [2023-11-29 00:11:40,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 29 transitions, 112 flow [2023-11-29 00:11:40,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 29 transitions, 111 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:11:40,765 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 67 flow [2023-11-29 00:11:40,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-11-29 00:11:40,766 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -7 predicate places. [2023-11-29 00:11:40,766 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 67 flow [2023-11-29 00:11:40,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:40,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:11:40,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 00:11:40,767 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 00:11:40,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:40,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1558489866, now seen corresponding path program 1 times [2023-11-29 00:11:40,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:40,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263951413] [2023-11-29 00:11:40,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:40,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:40,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:40,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263951413] [2023-11-29 00:11:40,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263951413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:11:40,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:11:40,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:11:40,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041128137] [2023-11-29 00:11:40,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:11:40,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:11:40,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:40,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:11:40,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:11:40,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 00:11:40,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 67 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:11:40,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 00:11:40,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:40,982 INFO L124 PetriNetUnfolderBase]: 57/110 cut-off events. [2023-11-29 00:11:40,983 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-29 00:11:40,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 110 events. 57/110 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 273 event pairs, 1 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 254. Up to 38 conditions per place. [2023-11-29 00:11:40,984 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 22 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2023-11-29 00:11:40,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 177 flow [2023-11-29 00:11:40,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:11:40,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:11:40,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2023-11-29 00:11:40,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7757575757575758 [2023-11-29 00:11:40,987 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 128 transitions. [2023-11-29 00:11:40,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 128 transitions. [2023-11-29 00:11:40,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:40,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 128 transitions. [2023-11-29 00:11:40,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,990 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,990 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 67 flow. Second operand 5 states and 128 transitions. [2023-11-29 00:11:40,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 177 flow [2023-11-29 00:11:40,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 40 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:11:40,992 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 88 flow [2023-11-29 00:11:40,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-11-29 00:11:40,993 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -3 predicate places. [2023-11-29 00:11:40,994 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 88 flow [2023-11-29 00:11:40,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:40,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:40,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:11:40,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 00:11:40,995 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 00:11:40,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:40,995 INFO L85 PathProgramCache]: Analyzing trace with hash 120111039, now seen corresponding path program 1 times [2023-11-29 00:11:40,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:40,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700926661] [2023-11-29 00:11:40,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:40,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:41,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:41,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700926661] [2023-11-29 00:11:41,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700926661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:11:41,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:11:41,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:11:41,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097932952] [2023-11-29 00:11:41,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:11:41,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:11:41,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:41,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:11:41,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:11:41,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 00:11:41,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:41,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:11:41,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 00:11:41,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:41,186 INFO L124 PetriNetUnfolderBase]: 51/104 cut-off events. [2023-11-29 00:11:41,186 INFO L125 PetriNetUnfolderBase]: For 54/55 co-relation queries the response was YES. [2023-11-29 00:11:41,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 104 events. 51/104 cut-off events. For 54/55 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 258 event pairs, 1 based on Foata normal form. 4/108 useless extension candidates. Maximal degree in co-relation 275. Up to 46 conditions per place. [2023-11-29 00:11:41,188 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 17 selfloop transitions, 4 changer transitions 7/36 dead transitions. [2023-11-29 00:11:41,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 175 flow [2023-11-29 00:11:41,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:11:41,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:11:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2023-11-29 00:11:41,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7515151515151515 [2023-11-29 00:11:41,190 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 124 transitions. [2023-11-29 00:11:41,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 124 transitions. [2023-11-29 00:11:41,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:41,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 124 transitions. [2023-11-29 00:11:41,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:41,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:41,192 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:41,192 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 88 flow. Second operand 5 states and 124 transitions. [2023-11-29 00:11:41,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 175 flow [2023-11-29 00:11:41,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:11:41,194 INFO L231 Difference]: Finished difference. Result has 35 places, 22 transitions, 82 flow [2023-11-29 00:11:41,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=35, PETRI_TRANSITIONS=22} [2023-11-29 00:11:41,195 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2023-11-29 00:11:41,195 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 22 transitions, 82 flow [2023-11-29 00:11:41,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:41,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:41,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:11:41,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 00:11:41,196 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 00:11:41,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:41,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1979297952, now seen corresponding path program 2 times [2023-11-29 00:11:41,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:41,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625538762] [2023-11-29 00:11:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:41,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:41,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:41,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625538762] [2023-11-29 00:11:41,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625538762] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:11:41,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934264771] [2023-11-29 00:11:41,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:11:41,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:11:41,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:11:41,293 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:11:41,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:11:41,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:11:41,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:11:41,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:11:41,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:11:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:41,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:11:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:41,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934264771] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:11:41,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:11:41,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-29 00:11:41,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946947107] [2023-11-29 00:11:41,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:11:41,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:11:41,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:41,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:11:41,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:11:41,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 00:11:41,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 22 transitions, 82 flow. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:41,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:11:41,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 00:11:41,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:41,780 INFO L124 PetriNetUnfolderBase]: 41/83 cut-off events. [2023-11-29 00:11:41,780 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-29 00:11:41,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 83 events. 41/83 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 165 event pairs, 3 based on Foata normal form. 5/88 useless extension candidates. Maximal degree in co-relation 231. Up to 48 conditions per place. [2023-11-29 00:11:41,782 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 20 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2023-11-29 00:11:41,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 34 transitions, 169 flow [2023-11-29 00:11:41,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:11:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:11:41,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2023-11-29 00:11:41,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7454545454545455 [2023-11-29 00:11:41,785 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 123 transitions. [2023-11-29 00:11:41,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 123 transitions. [2023-11-29 00:11:41,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:41,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 123 transitions. [2023-11-29 00:11:41,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:41,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:41,787 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:41,787 INFO L175 Difference]: Start difference. First operand has 35 places, 22 transitions, 82 flow. Second operand 5 states and 123 transitions. [2023-11-29 00:11:41,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 34 transitions, 169 flow [2023-11-29 00:11:41,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 159 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-29 00:11:41,789 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 109 flow [2023-11-29 00:11:41,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=109, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2023-11-29 00:11:41,790 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-11-29 00:11:41,790 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 109 flow [2023-11-29 00:11:41,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:41,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:41,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:11:41,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:11:41,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 00:11:41,992 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 00:11:41,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash 947753003, now seen corresponding path program 2 times [2023-11-29 00:11:41,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:41,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050132119] [2023-11-29 00:11:41,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:41,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:42,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:42,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050132119] [2023-11-29 00:11:42,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050132119] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:11:42,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:11:42,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:11:42,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111633279] [2023-11-29 00:11:42,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:11:42,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:11:42,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:42,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:11:42,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:11:42,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 00:11:42,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 25 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:42,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:11:42,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 00:11:42,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:42,158 INFO L124 PetriNetUnfolderBase]: 37/77 cut-off events. [2023-11-29 00:11:42,158 INFO L125 PetriNetUnfolderBase]: For 65/66 co-relation queries the response was YES. [2023-11-29 00:11:42,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 77 events. 37/77 cut-off events. For 65/66 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 153 event pairs, 2 based on Foata normal form. 4/81 useless extension candidates. Maximal degree in co-relation 252. Up to 55 conditions per place. [2023-11-29 00:11:42,160 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 20 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2023-11-29 00:11:42,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 194 flow [2023-11-29 00:11:42,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:11:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:11:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2023-11-29 00:11:42,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7272727272727273 [2023-11-29 00:11:42,163 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 120 transitions. [2023-11-29 00:11:42,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 120 transitions. [2023-11-29 00:11:42,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:42,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 120 transitions. [2023-11-29 00:11:42,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:42,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:42,165 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:42,165 INFO L175 Difference]: Start difference. First operand has 37 places, 25 transitions, 109 flow. Second operand 5 states and 120 transitions. [2023-11-29 00:11:42,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 194 flow [2023-11-29 00:11:42,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 189 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 00:11:42,168 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 145 flow [2023-11-29 00:11:42,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-11-29 00:11:42,169 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2023-11-29 00:11:42,169 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 145 flow [2023-11-29 00:11:42,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:42,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:42,170 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] [2023-11-29 00:11:42,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 00:11:42,170 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 00:11:42,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:42,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1858786545, now seen corresponding path program 1 times [2023-11-29 00:11:42,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:42,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662170456] [2023-11-29 00:11:42,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:42,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:42,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:42,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662170456] [2023-11-29 00:11:42,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662170456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:11:42,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236836460] [2023-11-29 00:11:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:42,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:11:42,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:11:42,652 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:11:42,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:11:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:42,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:11:42,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:12:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:12:36,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:12:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:12:55,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236836460] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:12:55,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:12:55,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-29 00:12:55,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165879825] [2023-11-29 00:12:55,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:12:55,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:12:55,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:12:55,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:12:55,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=147, Unknown=9, NotChecked=0, Total=210 [2023-11-29 00:12:55,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 00:12:55,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 145 flow. Second operand has 15 states, 15 states have (on average 20.933333333333334) internal successors, (314), 15 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) [2023-11-29 00:12:55,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:12:55,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 00:12:55,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:12:58,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.50s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:13:03,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:13:04,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:13:05,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:13:13,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:13:17,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:13:21,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:13:25,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:13:29,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:13:32,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.18s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:13:36,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:13:40,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:13:44,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:13:48,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:13:55,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:13:58,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:13:58,792 INFO L124 PetriNetUnfolderBase]: 125/262 cut-off events. [2023-11-29 00:13:58,793 INFO L125 PetriNetUnfolderBase]: For 460/463 co-relation queries the response was YES. [2023-11-29 00:13:58,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 262 events. 125/262 cut-off events. For 460/463 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 991 event pairs, 3 based on Foata normal form. 8/270 useless extension candidates. Maximal degree in co-relation 981. Up to 85 conditions per place. [2023-11-29 00:13:58,795 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 49 selfloop transitions, 25 changer transitions 14/96 dead transitions. [2023-11-29 00:13:58,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 96 transitions, 665 flow [2023-11-29 00:13:58,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:13:58,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 00:13:58,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 330 transitions. [2023-11-29 00:13:58,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7692307692307693 [2023-11-29 00:13:58,798 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 330 transitions. [2023-11-29 00:13:58,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 330 transitions. [2023-11-29 00:13:58,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:13:58,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 330 transitions. [2023-11-29 00:13:58,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 25.384615384615383) internal successors, (330), 13 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:13:58,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:13:58,801 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:13:58,801 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 145 flow. Second operand 13 states and 330 transitions. [2023-11-29 00:13:58,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 96 transitions, 665 flow [2023-11-29 00:13:58,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 96 transitions, 650 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-29 00:13:58,807 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 397 flow [2023-11-29 00:13:58,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=397, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-11-29 00:13:58,808 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 25 predicate places. [2023-11-29 00:13:58,808 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 397 flow [2023-11-29 00:13:58,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.933333333333334) internal successors, (314), 15 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) [2023-11-29 00:13:58,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:13:58,809 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] [2023-11-29 00:13:58,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 00:13:59,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:13:59,010 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 00:13:59,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:13:59,011 INFO L85 PathProgramCache]: Analyzing trace with hash 2075109941, now seen corresponding path program 2 times [2023-11-29 00:13:59,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:13:59,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682361061] [2023-11-29 00:13:59,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:59,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:13:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:13:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:13:59,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:13:59,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682361061] [2023-11-29 00:13:59,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682361061] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:13:59,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7434245] [2023-11-29 00:13:59,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:13:59,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:13:59,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:13:59,355 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:13:59,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:13:59,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:13:59,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:13:59,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:13:59,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:14:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:05,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:14:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:06,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7434245] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:14:06,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:14:06,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2023-11-29 00:14:06,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875470416] [2023-11-29 00:14:06,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:14:06,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:14:06,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:06,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:14:06,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=115, Unknown=1, NotChecked=0, Total=156 [2023-11-29 00:14:06,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 00:14:06,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 397 flow. Second operand has 13 states, 13 states have (on average 21.153846153846153) internal successors, (275), 13 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:06,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:14:06,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 00:14:06,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:14:14,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:14:17,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:14:22,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:14:26,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:14:31,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:14:34,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:14:38,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:14:49,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:14:50,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:14:54,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:14:55,124 INFO L124 PetriNetUnfolderBase]: 165/376 cut-off events. [2023-11-29 00:14:55,125 INFO L125 PetriNetUnfolderBase]: For 1551/1553 co-relation queries the response was YES. [2023-11-29 00:14:55,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1787 conditions, 376 events. 165/376 cut-off events. For 1551/1553 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1749 event pairs, 3 based on Foata normal form. 4/380 useless extension candidates. Maximal degree in co-relation 1760. Up to 149 conditions per place. [2023-11-29 00:14:55,128 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 55 selfloop transitions, 32 changer transitions 15/110 dead transitions. [2023-11-29 00:14:55,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 110 transitions, 1034 flow [2023-11-29 00:14:55,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:14:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 00:14:55,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 340 transitions. [2023-11-29 00:14:55,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7359307359307359 [2023-11-29 00:14:55,131 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 340 transitions. [2023-11-29 00:14:55,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 340 transitions. [2023-11-29 00:14:55,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:14:55,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 340 transitions. [2023-11-29 00:14:55,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 24.285714285714285) internal successors, (340), 14 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:55,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 33.0) internal successors, (495), 15 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:55,135 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 33.0) internal successors, (495), 15 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:55,135 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 397 flow. Second operand 14 states and 340 transitions. [2023-11-29 00:14:55,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 110 transitions, 1034 flow [2023-11-29 00:14:55,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 110 transitions, 915 flow, removed 58 selfloop flow, removed 2 redundant places. [2023-11-29 00:14:55,145 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 592 flow [2023-11-29 00:14:55,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=592, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2023-11-29 00:14:55,146 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 40 predicate places. [2023-11-29 00:14:55,146 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 592 flow [2023-11-29 00:14:55,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.153846153846153) internal successors, (275), 13 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:55,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:14:55,147 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] [2023-11-29 00:14:55,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 00:14:55,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:14:55,348 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 00:14:55,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:55,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1057942354, now seen corresponding path program 3 times [2023-11-29 00:14:55,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:55,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250788764] [2023-11-29 00:14:55,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:55,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:55,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:55,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250788764] [2023-11-29 00:14:55,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250788764] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:14:55,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058787175] [2023-11-29 00:14:55,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:14:55,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:55,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:14:55,519 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:14:55,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:18:32,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:18:32,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:18:32,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:18:32,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:18:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:18:59,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:19:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:19:32,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058787175] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:19:32,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:19:32,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 7] total 15 [2023-11-29 00:19:32,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967662974] [2023-11-29 00:19:32,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:19:32,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:19:32,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:19:32,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:19:32,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=166, Unknown=11, NotChecked=0, Total=240 [2023-11-29 00:19:32,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 00:19:32,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 592 flow. Second operand has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:19:32,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:19:32,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 00:19:32,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:19:37,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:20:10,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:20:15,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:20:19,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:20:24,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:20:27,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:20:45,151 WARN L293 SmtUtils]: Spent 9.30s on a formula simplification. DAG size of input: 45 DAG size of output: 40 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:20:49,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:20:50,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:20:54,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:20:58,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:21:02,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:21:06,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:21:10,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:21:15,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:21:19,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:21:25,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:21:29,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:21:33,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:21:35,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:21:39,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:21:43,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:21:48,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:21:52,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:21:56,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:22:00,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:22:04,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:22:10,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:22:13,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:22:16,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:22:20,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:22:24,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:22:28,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:22:32,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:22:34,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:22:36,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:22:37,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:22:38,468 INFO L124 PetriNetUnfolderBase]: 449/1007 cut-off events. [2023-11-29 00:22:38,468 INFO L125 PetriNetUnfolderBase]: For 6622/6640 co-relation queries the response was YES. [2023-11-29 00:22:38,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4891 conditions, 1007 events. 449/1007 cut-off events. For 6622/6640 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6134 event pairs, 16 based on Foata normal form. 26/1033 useless extension candidates. Maximal degree in co-relation 4858. Up to 274 conditions per place. [2023-11-29 00:22:38,477 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 126 selfloop transitions, 113 changer transitions 13/260 dead transitions. [2023-11-29 00:22:38,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 260 transitions, 2608 flow [2023-11-29 00:22:38,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 00:22:38,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 00:22:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 656 transitions. [2023-11-29 00:22:38,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7645687645687645 [2023-11-29 00:22:38,479 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 656 transitions. [2023-11-29 00:22:38,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 656 transitions. [2023-11-29 00:22:38,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:22:38,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 656 transitions. [2023-11-29 00:22:38,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 25.23076923076923) internal successors, (656), 26 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:38,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 33.0) internal successors, (891), 27 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:38,484 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 33.0) internal successors, (891), 27 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:38,484 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 592 flow. Second operand 26 states and 656 transitions. [2023-11-29 00:22:38,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 260 transitions, 2608 flow [2023-11-29 00:22:38,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 260 transitions, 2433 flow, removed 86 selfloop flow, removed 3 redundant places. [2023-11-29 00:22:38,502 INFO L231 Difference]: Finished difference. Result has 103 places, 161 transitions, 1739 flow [2023-11-29 00:22:38,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1739, PETRI_PLACES=103, PETRI_TRANSITIONS=161} [2023-11-29 00:22:38,503 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 68 predicate places. [2023-11-29 00:22:38,503 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 161 transitions, 1739 flow [2023-11-29 00:22:38,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:38,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:22:38,504 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] [2023-11-29 00:22:38,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:22:38,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:22:38,704 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 00:22:38,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:38,705 INFO L85 PathProgramCache]: Analyzing trace with hash -367909678, now seen corresponding path program 4 times [2023-11-29 00:22:38,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:38,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310773498] [2023-11-29 00:22:38,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:38,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:22:38,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:38,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310773498] [2023-11-29 00:22:38,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310773498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:38,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025703973] [2023-11-29 00:22:38,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:22:38,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:38,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:38,872 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:38,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:23:15,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:23:15,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:23:15,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:23:15,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:23:20,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:23:21,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025703973] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:23:21,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:23:21,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 00:23:21,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392835585] [2023-11-29 00:23:21,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:23:21,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:23:21,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:21,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:23:21,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:23:21,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 00:23:21,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 161 transitions, 1739 flow. Second operand has 12 states, 12 states have (on average 21.5) internal successors, (258), 12 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:21,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:23:21,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 00:23:21,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:23:24,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:23:28,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:23:32,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:23:34,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:23:41,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:23:45,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:23:45,785 INFO L124 PetriNetUnfolderBase]: 405/894 cut-off events. [2023-11-29 00:23:45,785 INFO L125 PetriNetUnfolderBase]: For 9137/9173 co-relation queries the response was YES. [2023-11-29 00:23:45,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5099 conditions, 894 events. 405/894 cut-off events. For 9137/9173 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5273 event pairs, 9 based on Foata normal form. 33/925 useless extension candidates. Maximal degree in co-relation 5058. Up to 342 conditions per place. [2023-11-29 00:23:45,793 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 124 selfloop transitions, 45 changer transitions 17/194 dead transitions. [2023-11-29 00:23:45,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 194 transitions, 2376 flow [2023-11-29 00:23:45,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:23:45,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 00:23:45,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 271 transitions. [2023-11-29 00:23:45,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7465564738292011 [2023-11-29 00:23:45,804 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 271 transitions. [2023-11-29 00:23:45,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 271 transitions. [2023-11-29 00:23:45,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:23:45,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 271 transitions. [2023-11-29 00:23:45,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 24.636363636363637) internal successors, (271), 11 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:45,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 33.0) internal successors, (396), 12 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:45,806 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 33.0) internal successors, (396), 12 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:45,806 INFO L175 Difference]: Start difference. First operand has 103 places, 161 transitions, 1739 flow. Second operand 11 states and 271 transitions. [2023-11-29 00:23:45,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 194 transitions, 2376 flow [2023-11-29 00:23:45,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 194 transitions, 2085 flow, removed 130 selfloop flow, removed 8 redundant places. [2023-11-29 00:23:45,836 INFO L231 Difference]: Finished difference. Result has 105 places, 150 transitions, 1470 flow [2023-11-29 00:23:45,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1470, PETRI_PLACES=105, PETRI_TRANSITIONS=150} [2023-11-29 00:23:45,837 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 70 predicate places. [2023-11-29 00:23:45,837 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 150 transitions, 1470 flow [2023-11-29 00:23:45,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.5) internal successors, (258), 12 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:45,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:23:45,838 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] [2023-11-29 00:23:45,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:23:46,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:23:46,039 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 00:23:46,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:46,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1166809672, now seen corresponding path program 5 times [2023-11-29 00:23:46,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:46,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437403274] [2023-11-29 00:23:46,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:46,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:23:46,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:46,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437403274] [2023-11-29 00:23:46,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437403274] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:23:46,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024386838] [2023-11-29 00:23:46,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:23:46,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:46,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:46,165 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:46,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9c4d26-5ae8-4c3d-8d7e-1e6d476dd681/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:23:51,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 00:23:51,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:23:51,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:23:51,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:24:14,574 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:24:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:24:17,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:24:49,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024386838] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:24:49,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:24:49,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 14 [2023-11-29 00:24:49,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989604021] [2023-11-29 00:24:49,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:24:49,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:24:49,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:49,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:24:49,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=150, Unknown=10, NotChecked=0, Total=210 [2023-11-29 00:24:49,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 00:24:49,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 150 transitions, 1470 flow. Second operand has 15 states, 15 states have (on average 21.333333333333332) internal successors, (320), 15 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:24:49,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:24:49,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 00:24:49,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:24:52,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:24:59,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:25:03,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:25:15,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:25:19,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:25:40,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:25:44,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:25:50,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:26:11,015 WARN L293 SmtUtils]: Spent 8.18s on a formula simplification. DAG size of input: 39 DAG size of output: 39 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:26:13,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:26:17,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:26:25,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:26:28,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:26:32,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:26:37,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:26:41,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:26:45,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:26:47,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:26:51,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:26:53,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []