./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl --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 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:28:50,338 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:28:50,424 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:28:50,430 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:28:50,430 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:28:50,458 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:28:50,459 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:28:50,460 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:28:50,461 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:28:50,461 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:28:50,462 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:28:50,463 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:28:50,464 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:28:50,464 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:28:50,465 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:28:50,466 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:28:50,466 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:28:50,467 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:28:50,468 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:28:50,468 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:28:50,469 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:28:50,470 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:28:50,470 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:28:50,471 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:28:50,484 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:28:50,485 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:28:50,485 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:28:50,486 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:28:50,486 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:28:50,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:28:50,491 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:28:50,492 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:28:50,492 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:28:50,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:28:50,493 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:28:50,493 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:28:50,494 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:28:50,494 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:28:50,494 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_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 [2023-11-12 02:28:50,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:28:50,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:28:50,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:28:50,835 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:28:50,835 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:28:50,837 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-11-12 02:28:54,119 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:28:54,355 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:28:54,355 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-11-12 02:28:54,364 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/data/8e6e57d49/98a8a9fd7d024ac3a63581b1cce38149/FLAGfcab34042 [2023-11-12 02:28:54,380 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/data/8e6e57d49/98a8a9fd7d024ac3a63581b1cce38149 [2023-11-12 02:28:54,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:28:54,386 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:28:54,388 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:28:54,388 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:28:54,394 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:28:54,395 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:28:54" (1/1) ... [2023-11-12 02:28:54,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51356715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:54, skipping insertion in model container [2023-11-12 02:28:54,396 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:28:54" (1/1) ... [2023-11-12 02:28:54,423 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:28:54,666 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:28:54,676 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:28:54,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:28:54,730 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:28:54,730 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:28:54,738 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:28:54,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:54 WrapperNode [2023-11-12 02:28:54,739 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:28:54,740 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:28:54,740 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:28:54,741 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:28:54,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:54" (1/1) ... [2023-11-12 02:28:54,767 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:54" (1/1) ... [2023-11-12 02:28:54,796 INFO L138 Inliner]: procedures = 21, calls = 35, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 62 [2023-11-12 02:28:54,797 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:28:54,798 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:28:54,798 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:28:54,798 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:28:54,807 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:54" (1/1) ... [2023-11-12 02:28:54,807 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:54" (1/1) ... [2023-11-12 02:28:54,814 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:54" (1/1) ... [2023-11-12 02:28:54,815 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:54" (1/1) ... [2023-11-12 02:28:54,830 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:54" (1/1) ... [2023-11-12 02:28:54,834 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:54" (1/1) ... [2023-11-12 02:28:54,841 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:54" (1/1) ... [2023-11-12 02:28:54,847 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:54" (1/1) ... [2023-11-12 02:28:54,849 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:28:54,853 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:28:54,853 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:28:54,853 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:28:54,854 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:54" (1/1) ... [2023-11-12 02:28:54,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:28:54,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:54,889 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:28:54,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:28:54,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:28:54,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:28:54,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:28:54,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:28:54,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:28:54,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:28:54,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:28:54,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:28:54,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:28:54,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:28:54,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:28:54,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:28:54,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:28:54,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:28:54,943 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:28:55,052 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:28:55,055 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:28:55,453 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:28:55,530 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:28:55,530 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:28:55,533 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:28:55 BoogieIcfgContainer [2023-11-12 02:28:55,533 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:28:55,536 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:28:55,537 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:28:55,541 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:28:55,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:28:54" (1/3) ... [2023-11-12 02:28:55,543 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31fe336e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:28:55, skipping insertion in model container [2023-11-12 02:28:55,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:54" (2/3) ... [2023-11-12 02:28:55,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31fe336e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:28:55, skipping insertion in model container [2023-11-12 02:28:55,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:28:55" (3/3) ... [2023-11-12 02:28:55,548 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2023-11-12 02:28:55,570 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:28:55,571 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-12 02:28:55,571 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:28:55,682 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:28:55,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 103 transitions, 220 flow [2023-11-12 02:28:55,774 INFO L124 PetriNetUnfolderBase]: 6/101 cut-off events. [2023-11-12 02:28:55,775 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:28:55,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 101 events. 6/101 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 71 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2023-11-12 02:28:55,785 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 103 transitions, 220 flow [2023-11-12 02:28:55,796 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 96 transitions, 204 flow [2023-11-12 02:28:55,802 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:28:55,819 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 96 transitions, 204 flow [2023-11-12 02:28:55,825 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 96 transitions, 204 flow [2023-11-12 02:28:55,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 96 transitions, 204 flow [2023-11-12 02:28:55,878 INFO L124 PetriNetUnfolderBase]: 6/96 cut-off events. [2023-11-12 02:28:55,878 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:28:55,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 96 events. 6/96 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2023-11-12 02:28:55,881 INFO L119 LiptonReduction]: Number of co-enabled transitions 614 [2023-11-12 02:28:59,957 INFO L134 LiptonReduction]: Checked pairs total: 1019 [2023-11-12 02:28:59,958 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-11-12 02:28:59,974 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:28:59,981 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;@410dcad7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:28:59,982 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-12 02:28:59,983 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:28:59,983 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-12 02:28:59,984 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:28:59,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:59,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-12 02:28:59,985 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:28:59,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:59,991 INFO L85 PathProgramCache]: Analyzing trace with hash 410, now seen corresponding path program 1 times [2023-11-12 02:29:00,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:00,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627931726] [2023-11-12 02:29:00,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:00,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:00,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:00,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627931726] [2023-11-12 02:29:00,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627931726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:00,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:00,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-12 02:29:00,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403116894] [2023-11-12 02:29:00,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:00,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:29:00,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:00,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:29:00,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:29:00,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 203 [2023-11-12 02:29:00,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:00,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:00,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 203 [2023-11-12 02:29:00,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:00,286 INFO L124 PetriNetUnfolderBase]: 129/228 cut-off events. [2023-11-12 02:29:00,286 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-12 02:29:00,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 228 events. 129/228 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 734 event pairs, 105 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 388. Up to 225 conditions per place. [2023-11-12 02:29:00,293 INFO L140 encePairwiseOnDemand]: 200/203 looper letters, 22 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2023-11-12 02:29:00,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 23 transitions, 102 flow [2023-11-12 02:29:00,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:29:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:29:00,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 207 transitions. [2023-11-12 02:29:00,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098522167487685 [2023-11-12 02:29:00,313 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 207 transitions. [2023-11-12 02:29:00,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 207 transitions. [2023-11-12 02:29:00,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:00,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 207 transitions. [2023-11-12 02:29:00,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:00,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:00,328 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:00,330 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 2 states and 207 transitions. [2023-11-12 02:29:00,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 23 transitions, 102 flow [2023-11-12 02:29:00,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:29:00,336 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 50 flow [2023-11-12 02:29:00,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-11-12 02:29:00,342 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -6 predicate places. [2023-11-12 02:29:00,342 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 50 flow [2023-11-12 02:29:00,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:00,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:00,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:29:00,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:29:00,344 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:29:00,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:00,345 INFO L85 PathProgramCache]: Analyzing trace with hash 401094, now seen corresponding path program 1 times [2023-11-12 02:29:00,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:00,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689391711] [2023-11-12 02:29:00,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:00,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:00,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:00,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689391711] [2023-11-12 02:29:00,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689391711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:00,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:00,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:29:00,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596961360] [2023-11-12 02:29:00,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:00,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:00,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:00,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:00,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:00,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 203 [2023-11-12 02:29:00,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 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) [2023-11-12 02:29:00,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:00,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 203 [2023-11-12 02:29:00,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:00,760 INFO L124 PetriNetUnfolderBase]: 121/212 cut-off events. [2023-11-12 02:29:00,760 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:29:00,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 212 events. 121/212 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 669 event pairs, 99 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 426. Up to 209 conditions per place. [2023-11-12 02:29:00,768 INFO L140 encePairwiseOnDemand]: 200/203 looper letters, 19 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-11-12 02:29:00,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 86 flow [2023-11-12 02:29:00,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:00,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:00,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2023-11-12 02:29:00,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4548440065681445 [2023-11-12 02:29:00,776 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2023-11-12 02:29:00,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2023-11-12 02:29:00,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:00,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2023-11-12 02:29:00,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:00,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:00,782 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:00,782 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 50 flow. Second operand 3 states and 277 transitions. [2023-11-12 02:29:00,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 86 flow [2023-11-12 02:29:00,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:29:00,784 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 48 flow [2023-11-12 02:29:00,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-11-12 02:29:00,785 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -6 predicate places. [2023-11-12 02:29:00,785 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 48 flow [2023-11-12 02:29:00,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 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) [2023-11-12 02:29:00,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:00,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:29:00,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:29:00,786 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)] === [2023-11-12 02:29:00,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:00,787 INFO L85 PathProgramCache]: Analyzing trace with hash 401095, now seen corresponding path program 1 times [2023-11-12 02:29:00,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:00,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529697865] [2023-11-12 02:29:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:00,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:00,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:00,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529697865] [2023-11-12 02:29:00,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529697865] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:00,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:00,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:29:00,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741336590] [2023-11-12 02:29:00,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:00,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:00,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:00,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:00,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:00,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 203 [2023-11-12 02:29:00,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:00,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:00,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 203 [2023-11-12 02:29:00,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:01,018 INFO L124 PetriNetUnfolderBase]: 113/196 cut-off events. [2023-11-12 02:29:01,018 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:29:01,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 196 events. 113/196 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 613 event pairs, 93 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 396. Up to 194 conditions per place. [2023-11-12 02:29:01,020 INFO L140 encePairwiseOnDemand]: 200/203 looper letters, 17 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-11-12 02:29:01,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 80 flow [2023-11-12 02:29:01,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:01,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2023-11-12 02:29:01,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318555008210181 [2023-11-12 02:29:01,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2023-11-12 02:29:01,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2023-11-12 02:29:01,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:01,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2023-11-12 02:29:01,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:01,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:01,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:01,029 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 48 flow. Second operand 3 states and 263 transitions. [2023-11-12 02:29:01,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 80 flow [2023-11-12 02:29:01,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 19 transitions, 79 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:01,030 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 45 flow [2023-11-12 02:29:01,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=45, PETRI_PLACES=24, PETRI_TRANSITIONS=19} [2023-11-12 02:29:01,031 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2023-11-12 02:29:01,031 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 45 flow [2023-11-12 02:29:01,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:01,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:01,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:29:01,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:29:01,033 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:29:01,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:01,033 INFO L85 PathProgramCache]: Analyzing trace with hash 385462181, now seen corresponding path program 1 times [2023-11-12 02:29:01,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:01,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895278690] [2023-11-12 02:29:01,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:01,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:01,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:01,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895278690] [2023-11-12 02:29:01,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895278690] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:01,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:01,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:29:01,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886642538] [2023-11-12 02:29:01,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:01,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:01,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:01,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:01,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:01,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 203 [2023-11-12 02:29:01,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 45 flow. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:01,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:01,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 203 [2023-11-12 02:29:01,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:01,177 INFO L124 PetriNetUnfolderBase]: 85/152 cut-off events. [2023-11-12 02:29:01,177 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:29:01,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 152 events. 85/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 424 event pairs, 69 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 309. Up to 150 conditions per place. [2023-11-12 02:29:01,179 INFO L140 encePairwiseOnDemand]: 201/203 looper letters, 16 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2023-11-12 02:29:01,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 18 transitions, 77 flow [2023-11-12 02:29:01,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:01,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:01,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 264 transitions. [2023-11-12 02:29:01,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43349753694581283 [2023-11-12 02:29:01,182 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 264 transitions. [2023-11-12 02:29:01,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 264 transitions. [2023-11-12 02:29:01,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:01,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 264 transitions. [2023-11-12 02:29:01,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:01,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:01,187 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:01,187 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 45 flow. Second operand 3 states and 264 transitions. [2023-11-12 02:29:01,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 18 transitions, 77 flow [2023-11-12 02:29:01,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 18 transitions, 76 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:01,189 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 44 flow [2023-11-12 02:29:01,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2023-11-12 02:29:01,191 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2023-11-12 02:29:01,191 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 44 flow [2023-11-12 02:29:01,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:01,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:01,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:29:01,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:29:01,193 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:29:01,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:01,194 INFO L85 PathProgramCache]: Analyzing trace with hash 385462179, now seen corresponding path program 1 times [2023-11-12 02:29:01,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:01,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687079461] [2023-11-12 02:29:01,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:01,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:01,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:01,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687079461] [2023-11-12 02:29:01,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687079461] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:01,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:01,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:29:01,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220718284] [2023-11-12 02:29:01,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:01,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:29:01,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:01,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:29:01,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:29:01,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 203 [2023-11-12 02:29:01,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 44 flow. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:01,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:01,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 203 [2023-11-12 02:29:01,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:01,505 INFO L124 PetriNetUnfolderBase]: 57/108 cut-off events. [2023-11-12 02:29:01,506 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:29:01,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 108 events. 57/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 261 event pairs, 45 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 222. Up to 106 conditions per place. [2023-11-12 02:29:01,507 INFO L140 encePairwiseOnDemand]: 201/203 looper letters, 15 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-11-12 02:29:01,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 17 transitions, 74 flow [2023-11-12 02:29:01,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:01,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:01,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2023-11-12 02:29:01,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4072249589490969 [2023-11-12 02:29:01,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2023-11-12 02:29:01,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2023-11-12 02:29:01,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:01,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2023-11-12 02:29:01,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:01,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:01,514 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:01,515 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 44 flow. Second operand 3 states and 248 transitions. [2023-11-12 02:29:01,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 17 transitions, 74 flow [2023-11-12 02:29:01,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 17 transitions, 73 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:01,516 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 43 flow [2023-11-12 02:29:01,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=43, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2023-11-12 02:29:01,517 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2023-11-12 02:29:01,517 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 43 flow [2023-11-12 02:29:01,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:01,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:01,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:01,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:29:01,519 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)] === [2023-11-12 02:29:01,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:01,519 INFO L85 PathProgramCache]: Analyzing trace with hash 9752128, now seen corresponding path program 1 times [2023-11-12 02:29:01,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:01,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832038202] [2023-11-12 02:29:01,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:01,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:01,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:01,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832038202] [2023-11-12 02:29:01,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832038202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:01,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:01,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:29:01,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425593605] [2023-11-12 02:29:01,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:01,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:29:01,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:01,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:29:01,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:29:01,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 203 [2023-11-12 02:29:01,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 43 flow. Second operand has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:01,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:01,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 203 [2023-11-12 02:29:01,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:01,836 INFO L124 PetriNetUnfolderBase]: 105/184 cut-off events. [2023-11-12 02:29:01,837 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:29:01,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 184 events. 105/184 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 571 event pairs, 2 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 379. Up to 118 conditions per place. [2023-11-12 02:29:01,839 INFO L140 encePairwiseOnDemand]: 197/203 looper letters, 34 selfloop transitions, 6 changer transitions 0/40 dead transitions. [2023-11-12 02:29:01,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 40 transitions, 172 flow [2023-11-12 02:29:01,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:29:01,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:29:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 472 transitions. [2023-11-12 02:29:01,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46502463054187193 [2023-11-12 02:29:01,843 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 472 transitions. [2023-11-12 02:29:01,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 472 transitions. [2023-11-12 02:29:01,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:01,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 472 transitions. [2023-11-12 02:29:01,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.4) internal successors, (472), 5 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:01,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 203.0) internal successors, (1218), 6 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:01,850 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 203.0) internal successors, (1218), 6 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:01,850 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 43 flow. Second operand 5 states and 472 transitions. [2023-11-12 02:29:01,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 40 transitions, 172 flow [2023-11-12 02:29:01,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 40 transitions, 171 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:01,852 INFO L231 Difference]: Finished difference. Result has 30 places, 22 transitions, 87 flow [2023-11-12 02:29:01,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=87, PETRI_PLACES=30, PETRI_TRANSITIONS=22} [2023-11-12 02:29:01,854 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2023-11-12 02:29:01,854 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 22 transitions, 87 flow [2023-11-12 02:29:01,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:01,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:01,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:01,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:29:01,855 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)] === [2023-11-12 02:29:01,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:01,856 INFO L85 PathProgramCache]: Analyzing trace with hash 564346455, now seen corresponding path program 1 times [2023-11-12 02:29:01,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:01,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603514158] [2023-11-12 02:29:01,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:01,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:29:02,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:02,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603514158] [2023-11-12 02:29:02,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603514158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:02,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:02,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:29:02,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075338118] [2023-11-12 02:29:02,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:02,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:29:02,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:02,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:29:02,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:29:02,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 203 [2023-11-12 02:29:02,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:02,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:02,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 203 [2023-11-12 02:29:02,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:02,156 INFO L124 PetriNetUnfolderBase]: 124/220 cut-off events. [2023-11-12 02:29:02,156 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2023-11-12 02:29:02,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 220 events. 124/220 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 729 event pairs, 12 based on Foata normal form. 12/230 useless extension candidates. Maximal degree in co-relation 612. Up to 119 conditions per place. [2023-11-12 02:29:02,159 INFO L140 encePairwiseOnDemand]: 199/203 looper letters, 32 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2023-11-12 02:29:02,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 215 flow [2023-11-12 02:29:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:29:02,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:29:02,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2023-11-12 02:29:02,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4618226600985222 [2023-11-12 02:29:02,162 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 375 transitions. [2023-11-12 02:29:02,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 375 transitions. [2023-11-12 02:29:02,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:02,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 375 transitions. [2023-11-12 02:29:02,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:02,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:02,171 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:02,172 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 87 flow. Second operand 4 states and 375 transitions. [2023-11-12 02:29:02,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 215 flow [2023-11-12 02:29:02,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:02,177 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 98 flow [2023-11-12 02:29:02,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2023-11-12 02:29:02,178 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2023-11-12 02:29:02,179 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 98 flow [2023-11-12 02:29:02,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:02,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:02,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:02,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:29:02,180 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)] === [2023-11-12 02:29:02,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:02,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1288747135, now seen corresponding path program 1 times [2023-11-12 02:29:02,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:02,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196321890] [2023-11-12 02:29:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:02,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:02,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:02,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196321890] [2023-11-12 02:29:02,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196321890] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:02,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:02,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:29:02,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549475924] [2023-11-12 02:29:02,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:02,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:29:02,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:02,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:29:02,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:29:02,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 203 [2023-11-12 02:29:02,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 89.75) internal successors, (359), 4 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:02,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:02,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 203 [2023-11-12 02:29:02,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:02,569 INFO L124 PetriNetUnfolderBase]: 134/231 cut-off events. [2023-11-12 02:29:02,569 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2023-11-12 02:29:02,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 231 events. 134/231 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 703 event pairs, 18 based on Foata normal form. 14/245 useless extension candidates. Maximal degree in co-relation 700. Up to 89 conditions per place. [2023-11-12 02:29:02,573 INFO L140 encePairwiseOnDemand]: 198/203 looper letters, 33 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2023-11-12 02:29:02,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 243 flow [2023-11-12 02:29:02,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:29:02,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:29:02,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 467 transitions. [2023-11-12 02:29:02,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4600985221674877 [2023-11-12 02:29:02,580 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 467 transitions. [2023-11-12 02:29:02,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 467 transitions. [2023-11-12 02:29:02,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:02,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 467 transitions. [2023-11-12 02:29:02,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 93.4) internal successors, (467), 5 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:02,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 203.0) internal successors, (1218), 6 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:02,586 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 203.0) internal successors, (1218), 6 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:02,586 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 98 flow. Second operand 5 states and 467 transitions. [2023-11-12 02:29:02,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 243 flow [2023-11-12 02:29:02,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 237 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:29:02,592 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 144 flow [2023-11-12 02:29:02,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2023-11-12 02:29:02,598 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2023-11-12 02:29:02,598 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 144 flow [2023-11-12 02:29:02,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.75) internal successors, (359), 4 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:02,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:02,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:02,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:29:02,599 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)] === [2023-11-12 02:29:02,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:02,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1322883521, now seen corresponding path program 2 times [2023-11-12 02:29:02,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:02,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901661916] [2023-11-12 02:29:02,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:02,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:03,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:03,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901661916] [2023-11-12 02:29:03,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901661916] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:29:03,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289078276] [2023-11-12 02:29:03,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:29:03,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:03,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:03,894 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:03,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:29:04,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:29:04,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:29:04,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:29:04,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:04,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:29:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:04,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289078276] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:29:04,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:29:04,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-11-12 02:29:04,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037902629] [2023-11-12 02:29:04,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:29:04,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:29:04,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:04,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:29:04,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:29:05,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 203 [2023-11-12 02:29:05,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 144 flow. Second operand has 16 states, 16 states have (on average 77.5625) internal successors, (1241), 16 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:05,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:05,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 203 [2023-11-12 02:29:05,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:09,450 INFO L124 PetriNetUnfolderBase]: 539/927 cut-off events. [2023-11-12 02:29:09,450 INFO L125 PetriNetUnfolderBase]: For 1049/1049 co-relation queries the response was YES. [2023-11-12 02:29:09,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3116 conditions, 927 events. 539/927 cut-off events. For 1049/1049 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4120 event pairs, 6 based on Foata normal form. 9/936 useless extension candidates. Maximal degree in co-relation 3105. Up to 299 conditions per place. [2023-11-12 02:29:09,461 INFO L140 encePairwiseOnDemand]: 193/203 looper letters, 100 selfloop transitions, 106 changer transitions 44/250 dead transitions. [2023-11-12 02:29:09,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 250 transitions, 1639 flow [2023-11-12 02:29:09,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-12 02:29:09,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-12 02:29:09,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3685 transitions. [2023-11-12 02:29:09,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.394624116513172 [2023-11-12 02:29:09,479 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3685 transitions. [2023-11-12 02:29:09,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3685 transitions. [2023-11-12 02:29:09,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:09,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3685 transitions. [2023-11-12 02:29:09,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 80.1086956521739) internal successors, (3685), 46 states have internal predecessors, (3685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:09,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 203.0) internal successors, (9541), 47 states have internal predecessors, (9541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:09,516 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 203.0) internal successors, (9541), 47 states have internal predecessors, (9541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:09,517 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 144 flow. Second operand 46 states and 3685 transitions. [2023-11-12 02:29:09,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 250 transitions, 1639 flow [2023-11-12 02:29:09,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 250 transitions, 1623 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:09,531 INFO L231 Difference]: Finished difference. Result has 104 places, 134 transitions, 1093 flow [2023-11-12 02:29:09,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1093, PETRI_PLACES=104, PETRI_TRANSITIONS=134} [2023-11-12 02:29:09,532 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2023-11-12 02:29:09,533 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 134 transitions, 1093 flow [2023-11-12 02:29:09,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 77.5625) internal successors, (1241), 16 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:09,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:09,536 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:09,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:29:09,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-12 02:29:09,742 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)] === [2023-11-12 02:29:09,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:09,743 INFO L85 PathProgramCache]: Analyzing trace with hash 189155755, now seen corresponding path program 1 times [2023-11-12 02:29:09,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:09,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313779874] [2023-11-12 02:29:09,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:09,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:11,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:11,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313779874] [2023-11-12 02:29:11,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313779874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:29:11,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62621662] [2023-11-12 02:29:11,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:11,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:11,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:11,276 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:11,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:29:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:11,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 02:29:11,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:12,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:29:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:14,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62621662] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:29:14,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:29:14,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-12 02:29:14,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990686741] [2023-11-12 02:29:14,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:29:14,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 02:29:14,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:14,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 02:29:14,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:29:15,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 203 [2023-11-12 02:29:15,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 134 transitions, 1093 flow. Second operand has 24 states, 24 states have (on average 80.16666666666667) internal successors, (1924), 24 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:15,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:15,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 203 [2023-11-12 02:29:15,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:16,719 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 [] [2023-11-12 02:29:22,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 02:29:30,576 INFO L124 PetriNetUnfolderBase]: 1184/2119 cut-off events. [2023-11-12 02:29:30,576 INFO L125 PetriNetUnfolderBase]: For 22753/22753 co-relation queries the response was YES. [2023-11-12 02:29:30,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11324 conditions, 2119 events. 1184/2119 cut-off events. For 22753/22753 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11718 event pairs, 1 based on Foata normal form. 20/2139 useless extension candidates. Maximal degree in co-relation 11291. Up to 701 conditions per place. [2023-11-12 02:29:30,611 INFO L140 encePairwiseOnDemand]: 195/203 looper letters, 218 selfloop transitions, 168 changer transitions 146/532 dead transitions. [2023-11-12 02:29:30,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 532 transitions, 5143 flow [2023-11-12 02:29:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-12 02:29:30,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-11-12 02:29:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 4699 transitions. [2023-11-12 02:29:30,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4133532723434201 [2023-11-12 02:29:30,630 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 4699 transitions. [2023-11-12 02:29:30,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 4699 transitions. [2023-11-12 02:29:30,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:30,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 4699 transitions. [2023-11-12 02:29:30,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 83.91071428571429) internal successors, (4699), 56 states have internal predecessors, (4699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:30,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 203.0) internal successors, (11571), 57 states have internal predecessors, (11571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:30,676 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 203.0) internal successors, (11571), 57 states have internal predecessors, (11571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:30,676 INFO L175 Difference]: Start difference. First operand has 104 places, 134 transitions, 1093 flow. Second operand 56 states and 4699 transitions. [2023-11-12 02:29:30,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 532 transitions, 5143 flow [2023-11-12 02:29:30,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 532 transitions, 4676 flow, removed 224 selfloop flow, removed 9 redundant places. [2023-11-12 02:29:30,789 INFO L231 Difference]: Finished difference. Result has 166 places, 265 transitions, 2647 flow [2023-11-12 02:29:30,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=2647, PETRI_PLACES=166, PETRI_TRANSITIONS=265} [2023-11-12 02:29:30,791 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 135 predicate places. [2023-11-12 02:29:30,791 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 265 transitions, 2647 flow [2023-11-12 02:29:30,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 80.16666666666667) internal successors, (1924), 24 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:30,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:30,793 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:30,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:30,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:30,998 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)] === [2023-11-12 02:29:30,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:30,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1212136217, now seen corresponding path program 2 times [2023-11-12 02:29:30,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:30,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23964938] [2023-11-12 02:29:30,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:30,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:32,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:32,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23964938] [2023-11-12 02:29:32,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23964938] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:29:32,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019602893] [2023-11-12 02:29:32,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:29:32,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:32,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:32,389 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:32,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a4923-6428-45a7-8ec0-a7cc5e0aa391/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:29:32,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:29:32,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:29:32,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-12 02:29:32,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:34,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:29:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:36,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019602893] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:29:36,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:29:36,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-12 02:29:36,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247111442] [2023-11-12 02:29:36,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:29:36,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:29:36,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:36,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:29:36,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:29:37,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 203 [2023-11-12 02:29:37,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 265 transitions, 2647 flow. Second operand has 25 states, 25 states have (on average 77.12) internal successors, (1928), 25 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:37,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:37,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 203 [2023-11-12 02:29:37,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand