./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ebedbc62bd44b0c214a81c07c6f99e850a5d96675b77716f8547d1b39e8b2cf8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:40:49,409 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:40:49,473 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-28 20:40:49,478 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:40:49,478 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:40:49,502 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:40:49,503 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:40:49,503 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:40:49,504 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:40:49,504 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:40:49,505 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:40:49,505 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:40:49,506 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:40:49,507 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:40:49,507 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:40:49,508 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:40:49,508 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:40:49,509 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:40:49,509 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:40:49,510 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:40:49,510 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-28 20:40:49,511 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-28 20:40:49,511 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-28 20:40:49,511 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:40:49,512 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-28 20:40:49,512 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 20:40:49,513 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:40:49,513 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:40:49,514 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:40:49,514 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:40:49,514 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:40:49,515 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:40:49,515 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:40:49,516 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:40:49,516 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:40:49,516 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:40:49,517 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:40:49,517 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:40:49,517 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:40:49,517 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:40:49,517 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:40:49,518 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_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebedbc62bd44b0c214a81c07c6f99e850a5d96675b77716f8547d1b39e8b2cf8 [2023-11-28 20:40:49,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:40:49,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:40:49,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:40:49,768 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:40:49,768 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:40:49,769 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i [2023-11-28 20:40:52,528 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:40:52,755 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:40:52,756 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i [2023-11-28 20:40:52,772 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/data/fe1fba586/695765a4e1234a00b13a8124f3215c29/FLAG898f89ce4 [2023-11-28 20:40:52,787 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/data/fe1fba586/695765a4e1234a00b13a8124f3215c29 [2023-11-28 20:40:52,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:40:52,791 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:40:52,792 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:40:52,793 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:40:52,798 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:40:52,799 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:40:52" (1/1) ... [2023-11-28 20:40:52,800 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b03ca8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:40:52, skipping insertion in model container [2023-11-28 20:40:52,800 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:40:52" (1/1) ... [2023-11-28 20:40:52,850 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:40:53,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:40:53,345 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:40:53,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:40:53,465 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:40:53,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:40:53 WrapperNode [2023-11-28 20:40:53,466 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:40:53,467 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:40:53,467 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:40:53,467 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:40:53,475 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:40:53" (1/1) ... [2023-11-28 20:40:53,515 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:40:53" (1/1) ... [2023-11-28 20:40:53,541 INFO L138 Inliner]: procedures = 263, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2023-11-28 20:40:53,541 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:40:53,542 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:40:53,542 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:40:53,542 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:40:53,554 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:40:53" (1/1) ... [2023-11-28 20:40:53,555 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:40:53" (1/1) ... [2023-11-28 20:40:53,558 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:40:53" (1/1) ... [2023-11-28 20:40:53,573 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [1, 5]. 83 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 4 writes are split as follows [1, 3]. [2023-11-28 20:40:53,573 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:40:53" (1/1) ... [2023-11-28 20:40:53,574 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:40:53" (1/1) ... [2023-11-28 20:40:53,581 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:40:53" (1/1) ... [2023-11-28 20:40:53,584 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:40:53" (1/1) ... [2023-11-28 20:40:53,586 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:40:53" (1/1) ... [2023-11-28 20:40:53,588 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:40:53" (1/1) ... [2023-11-28 20:40:53,591 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:40:53,592 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:40:53,592 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:40:53,593 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:40:53,594 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:40:53" (1/1) ... [2023-11-28 20:40:53,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:40:53,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:40:53,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:40:53,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:40:53,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:40:53,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:40:53,658 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-28 20:40:53,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:40:53,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:40:53,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:40:53,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:40:53,658 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-28 20:40:53,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:40:53,659 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-28 20:40:53,659 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-28 20:40:53,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:40:53,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:40:53,660 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-28 20:40:53,795 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:40:53,797 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:40:53,972 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:40:54,066 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:40:54,067 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-28 20:40:54,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:40:54 BoogieIcfgContainer [2023-11-28 20:40:54,067 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:40:54,070 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:40:54,070 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:40:54,073 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:40:54,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:40:52" (1/3) ... [2023-11-28 20:40:54,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d008641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:40:54, skipping insertion in model container [2023-11-28 20:40:54,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:40:53" (2/3) ... [2023-11-28 20:40:54,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d008641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:40:54, skipping insertion in model container [2023-11-28 20:40:54,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:40:54" (3/3) ... [2023-11-28 20:40:54,075 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_02-funloop_norace.i [2023-11-28 20:40:54,089 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:40:54,090 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-11-28 20:40:54,090 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-28 20:40:54,127 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 20:40:54,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 36 transitions, 76 flow [2023-11-28 20:40:54,180 INFO L124 PetriNetUnfolderBase]: 3/35 cut-off events. [2023-11-28 20:40:54,180 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 20:40:54,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 35 events. 3/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 75 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2023-11-28 20:40:54,183 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 36 transitions, 76 flow [2023-11-28 20:40:54,187 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 35 transitions, 73 flow [2023-11-28 20:40:54,196 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:40:54,203 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;@20f50353, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:40:54,203 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-11-28 20:40:54,206 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 20:40:54,206 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-28 20:40:54,206 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 20:40:54,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:40:54,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 20:40:54,208 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:40:54,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:54,213 INFO L85 PathProgramCache]: Analyzing trace with hash 247585, now seen corresponding path program 1 times [2023-11-28 20:40:54,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:54,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894461576] [2023-11-28 20:40:54,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:54,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:40:54,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:54,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894461576] [2023-11-28 20:40:54,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894461576] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:40:54,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:40:54,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:40:54,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124164244] [2023-11-28 20:40:54,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:40:54,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:40:54,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:54,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:40:54,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:40:54,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-28 20:40:54,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:54,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:40:54,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-28 20:40:54,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:40:54,559 INFO L124 PetriNetUnfolderBase]: 74/209 cut-off events. [2023-11-28 20:40:54,560 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-28 20:40:54,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 209 events. 74/209 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 933 event pairs, 56 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 345. Up to 149 conditions per place. [2023-11-28 20:40:54,565 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 20 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-11-28 20:40:54,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 119 flow [2023-11-28 20:40:54,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:40:54,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:40:54,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-28 20:40:54,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2023-11-28 20:40:54,578 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-28 20:40:54,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-28 20:40:54,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:40:54,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-28 20:40:54,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:54,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:54,589 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:54,590 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 73 flow. Second operand 3 states and 68 transitions. [2023-11-28 20:40:54,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 119 flow [2023-11-28 20:40:54,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 118 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:40:54,595 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 84 flow [2023-11-28 20:40:54,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-11-28 20:40:54,601 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-11-28 20:40:54,601 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 84 flow [2023-11-28 20:40:54,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:54,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:40:54,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-28 20:40:54,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:40:54,603 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:40:54,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:54,603 INFO L85 PathProgramCache]: Analyzing trace with hash 7674193, now seen corresponding path program 1 times [2023-11-28 20:40:54,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:54,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633887396] [2023-11-28 20:40:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:54,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:40:54,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:54,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633887396] [2023-11-28 20:40:54,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633887396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:40:54,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124163147] [2023-11-28 20:40:54,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:54,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:54,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:40:54,700 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:40:54,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:40:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:54,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:40:54,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:40:54,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:40:54,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:40:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:40:54,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124163147] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:40:54,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:40:54,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-28 20:40:54,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806918291] [2023-11-28 20:40:54,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:40:54,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:40:54,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:54,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:40:54,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:40:54,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-28 20:40:54,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:54,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:40:54,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-28 20:40:54,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:40:54,929 INFO L124 PetriNetUnfolderBase]: 74/212 cut-off events. [2023-11-28 20:40:54,929 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 20:40:54,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 212 events. 74/212 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 933 event pairs, 56 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 367. Up to 149 conditions per place. [2023-11-28 20:40:54,932 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 20 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2023-11-28 20:40:54,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 146 flow [2023-11-28 20:40:54,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:40:54,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 20:40:54,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2023-11-28 20:40:54,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2023-11-28 20:40:54,935 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 118 transitions. [2023-11-28 20:40:54,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 118 transitions. [2023-11-28 20:40:54,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:40:54,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 118 transitions. [2023-11-28 20:40:54,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:54,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:54,938 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:54,938 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 84 flow. Second operand 6 states and 118 transitions. [2023-11-28 20:40:54,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 146 flow [2023-11-28 20:40:54,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 39 transitions, 142 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-28 20:40:54,941 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 116 flow [2023-11-28 20:40:54,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-11-28 20:40:54,942 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2023-11-28 20:40:54,942 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 116 flow [2023-11-28 20:40:54,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:54,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:40:54,943 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-28 20:40:54,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:40:55,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:55,148 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:40:55,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:55,149 INFO L85 PathProgramCache]: Analyzing trace with hash 987681569, now seen corresponding path program 2 times [2023-11-28 20:40:55,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:55,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827730403] [2023-11-28 20:40:55,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:55,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 20:40:55,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:55,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827730403] [2023-11-28 20:40:55,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827730403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:40:55,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:40:55,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:40:55,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682900668] [2023-11-28 20:40:55,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:40:55,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:40:55,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:55,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:40:55,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:40:55,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2023-11-28 20:40:55,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:55,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:40:55,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2023-11-28 20:40:55,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:40:55,330 INFO L124 PetriNetUnfolderBase]: 74/207 cut-off events. [2023-11-28 20:40:55,330 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-28 20:40:55,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 207 events. 74/207 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 906 event pairs, 42 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 354. Up to 115 conditions per place. [2023-11-28 20:40:55,333 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 32 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-11-28 20:40:55,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 198 flow [2023-11-28 20:40:55,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:40:55,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:40:55,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2023-11-28 20:40:55,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2023-11-28 20:40:55,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 70 transitions. [2023-11-28 20:40:55,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 70 transitions. [2023-11-28 20:40:55,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:40:55,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 70 transitions. [2023-11-28 20:40:55,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:55,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:55,337 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:55,337 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 116 flow. Second operand 3 states and 70 transitions. [2023-11-28 20:40:55,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 198 flow [2023-11-28 20:40:55,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 184 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-28 20:40:55,341 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 104 flow [2023-11-28 20:40:55,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-11-28 20:40:55,342 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2023-11-28 20:40:55,342 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 104 flow [2023-11-28 20:40:55,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:55,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:40:55,342 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-28 20:40:55,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 20:40:55,343 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:40:55,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:55,343 INFO L85 PathProgramCache]: Analyzing trace with hash 987681570, now seen corresponding path program 1 times [2023-11-28 20:40:55,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:55,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823737549] [2023-11-28 20:40:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:55,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:40:55,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:55,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823737549] [2023-11-28 20:40:55,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823737549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:40:55,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462048160] [2023-11-28 20:40:55,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:55,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:55,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:40:55,442 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:40:55,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:40:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:55,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:40:55,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:40:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:40:55,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:40:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:40:55,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462048160] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:40:55,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:40:55,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-28 20:40:55,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588414235] [2023-11-28 20:40:55,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:40:55,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-28 20:40:55,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:55,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-28 20:40:55,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:40:55,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-28 20:40:55,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 104 flow. Second operand has 12 states, 12 states have (on average 16.0) internal successors, (192), 12 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:55,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:40:55,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-28 20:40:55,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:40:55,715 INFO L124 PetriNetUnfolderBase]: 74/217 cut-off events. [2023-11-28 20:40:55,715 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-11-28 20:40:55,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 217 events. 74/217 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 922 event pairs, 56 based on Foata normal form. 6/190 useless extension candidates. Maximal degree in co-relation 366. Up to 149 conditions per place. [2023-11-28 20:40:55,718 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 20 selfloop transitions, 11 changer transitions 0/44 dead transitions. [2023-11-28 20:40:55,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 44 transitions, 202 flow [2023-11-28 20:40:55,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:40:55,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-28 20:40:55,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 217 transitions. [2023-11-28 20:40:55,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023148148148148 [2023-11-28 20:40:55,721 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 217 transitions. [2023-11-28 20:40:55,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 217 transitions. [2023-11-28 20:40:55,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:40:55,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 217 transitions. [2023-11-28 20:40:55,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 18.083333333333332) internal successors, (217), 12 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:55,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 36.0) internal successors, (468), 13 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:55,727 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 36.0) internal successors, (468), 13 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:55,727 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 104 flow. Second operand 12 states and 217 transitions. [2023-11-28 20:40:55,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 44 transitions, 202 flow [2023-11-28 20:40:55,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 44 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 20:40:55,730 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 184 flow [2023-11-28 20:40:55,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=184, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-11-28 20:40:55,732 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2023-11-28 20:40:55,732 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 184 flow [2023-11-28 20:40:55,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.0) internal successors, (192), 12 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:55,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:40:55,732 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-28 20:40:55,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-28 20:40:55,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:55,938 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:40:55,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:55,938 INFO L85 PathProgramCache]: Analyzing trace with hash 869803298, now seen corresponding path program 2 times [2023-11-28 20:40:55,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:55,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117216916] [2023-11-28 20:40:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:55,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:40:56,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:56,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117216916] [2023-11-28 20:40:56,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117216916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:40:56,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:40:56,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:40:56,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548868998] [2023-11-28 20:40:56,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:40:56,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:40:56,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:56,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:40:56,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:40:56,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2023-11-28 20:40:56,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:56,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:40:56,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2023-11-28 20:40:56,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:40:56,144 INFO L124 PetriNetUnfolderBase]: 74/212 cut-off events. [2023-11-28 20:40:56,144 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-28 20:40:56,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 212 events. 74/212 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 905 event pairs, 42 based on Foata normal form. 1/177 useless extension candidates. Maximal degree in co-relation 358. Up to 114 conditions per place. [2023-11-28 20:40:56,147 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 37 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-11-28 20:40:56,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 276 flow [2023-11-28 20:40:56,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:40:56,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:40:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2023-11-28 20:40:56,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-28 20:40:56,149 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 72 transitions. [2023-11-28 20:40:56,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 72 transitions. [2023-11-28 20:40:56,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:40:56,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 72 transitions. [2023-11-28 20:40:56,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:56,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:56,150 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:56,151 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 184 flow. Second operand 3 states and 72 transitions. [2023-11-28 20:40:56,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 276 flow [2023-11-28 20:40:56,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 51 transitions, 228 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-28 20:40:56,156 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 138 flow [2023-11-28 20:40:56,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2023-11-28 20:40:56,157 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2023-11-28 20:40:56,157 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 138 flow [2023-11-28 20:40:56,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:56,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:40:56,158 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:40:56,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 20:40:56,158 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:40:56,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:56,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1821286882, now seen corresponding path program 1 times [2023-11-28 20:40:56,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:56,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095114894] [2023-11-28 20:40:56,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:56,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:40:56,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:56,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095114894] [2023-11-28 20:40:56,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095114894] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:40:56,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:40:56,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:40:56,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844904477] [2023-11-28 20:40:56,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:40:56,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:40:56,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:56,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:40:56,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:40:56,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-28 20:40:56,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:56,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:40:56,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-28 20:40:56,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:40:56,333 INFO L124 PetriNetUnfolderBase]: 122/353 cut-off events. [2023-11-28 20:40:56,334 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-11-28 20:40:56,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 353 events. 122/353 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1584 event pairs, 56 based on Foata normal form. 8/310 useless extension candidates. Maximal degree in co-relation 604. Up to 159 conditions per place. [2023-11-28 20:40:56,337 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 43 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-11-28 20:40:56,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 256 flow [2023-11-28 20:40:56,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:40:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:40:56,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2023-11-28 20:40:56,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2023-11-28 20:40:56,339 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 81 transitions. [2023-11-28 20:40:56,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 81 transitions. [2023-11-28 20:40:56,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:40:56,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 81 transitions. [2023-11-28 20:40:56,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:56,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:56,341 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:56,341 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 138 flow. Second operand 3 states and 81 transitions. [2023-11-28 20:40:56,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 256 flow [2023-11-28 20:40:56,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 57 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 20:40:56,346 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 146 flow [2023-11-28 20:40:56,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2023-11-28 20:40:56,347 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2023-11-28 20:40:56,347 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 146 flow [2023-11-28 20:40:56,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:56,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:40:56,347 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:40:56,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 20:40:56,348 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:40:56,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:56,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2089935274, now seen corresponding path program 1 times [2023-11-28 20:40:56,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:56,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489707515] [2023-11-28 20:40:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:56,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:40:56,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:56,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489707515] [2023-11-28 20:40:56,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489707515] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:40:56,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:40:56,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:40:56,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80992980] [2023-11-28 20:40:56,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:40:56,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:40:56,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:56,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:40:56,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:40:56,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2023-11-28 20:40:56,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:56,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:40:56,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2023-11-28 20:40:56,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:40:56,731 INFO L124 PetriNetUnfolderBase]: 122/326 cut-off events. [2023-11-28 20:40:56,731 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-11-28 20:40:56,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 326 events. 122/326 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1368 event pairs, 14 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 608. Up to 160 conditions per place. [2023-11-28 20:40:56,735 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 42 selfloop transitions, 6 changer transitions 0/58 dead transitions. [2023-11-28 20:40:56,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 270 flow [2023-11-28 20:40:56,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:40:56,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:40:56,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2023-11-28 20:40:56,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-11-28 20:40:56,737 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 99 transitions. [2023-11-28 20:40:56,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 99 transitions. [2023-11-28 20:40:56,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:40:56,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 99 transitions. [2023-11-28 20:40:56,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:56,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:56,739 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:56,739 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 146 flow. Second operand 5 states and 99 transitions. [2023-11-28 20:40:56,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 270 flow [2023-11-28 20:40:56,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 58 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:40:56,743 INFO L231 Difference]: Finished difference. Result has 58 places, 42 transitions, 152 flow [2023-11-28 20:40:56,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=58, PETRI_TRANSITIONS=42} [2023-11-28 20:40:56,744 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2023-11-28 20:40:56,744 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 42 transitions, 152 flow [2023-11-28 20:40:56,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:56,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:40:56,744 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:40:56,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-28 20:40:56,744 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:40:56,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:56,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2089935275, now seen corresponding path program 1 times [2023-11-28 20:40:56,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:56,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768692953] [2023-11-28 20:40:56,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:56,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:40:57,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:57,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768692953] [2023-11-28 20:40:57,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768692953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:40:57,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:40:57,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:40:57,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694143128] [2023-11-28 20:40:57,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:40:57,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:40:57,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:57,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:40:57,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:40:57,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2023-11-28 20:40:57,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 42 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:57,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:40:57,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2023-11-28 20:40:57,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:40:57,307 INFO L124 PetriNetUnfolderBase]: 138/321 cut-off events. [2023-11-28 20:40:57,308 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2023-11-28 20:40:57,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 321 events. 138/321 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1180 event pairs, 46 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 668. Up to 146 conditions per place. [2023-11-28 20:40:57,311 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 57 selfloop transitions, 6 changer transitions 0/71 dead transitions. [2023-11-28 20:40:57,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 338 flow [2023-11-28 20:40:57,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:40:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 20:40:57,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2023-11-28 20:40:57,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6157407407407407 [2023-11-28 20:40:57,313 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 133 transitions. [2023-11-28 20:40:57,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 133 transitions. [2023-11-28 20:40:57,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:40:57,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 133 transitions. [2023-11-28 20:40:57,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:57,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:57,315 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:57,315 INFO L175 Difference]: Start difference. First operand has 58 places, 42 transitions, 152 flow. Second operand 6 states and 133 transitions. [2023-11-28 20:40:57,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 338 flow [2023-11-28 20:40:57,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 71 transitions, 324 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-28 20:40:57,319 INFO L231 Difference]: Finished difference. Result has 61 places, 43 transitions, 164 flow [2023-11-28 20:40:57,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=164, PETRI_PLACES=61, PETRI_TRANSITIONS=43} [2023-11-28 20:40:57,320 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 25 predicate places. [2023-11-28 20:40:57,320 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 43 transitions, 164 flow [2023-11-28 20:40:57,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:57,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:40:57,320 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:40:57,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-28 20:40:57,321 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:40:57,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:57,321 INFO L85 PathProgramCache]: Analyzing trace with hash 2103030550, now seen corresponding path program 1 times [2023-11-28 20:40:57,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:57,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838271724] [2023-11-28 20:40:57,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:57,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:40:57,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:57,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838271724] [2023-11-28 20:40:57,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838271724] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:40:57,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:40:57,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:40:57,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107549006] [2023-11-28 20:40:57,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:40:57,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:40:57,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:57,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:40:57,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:40:57,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2023-11-28 20:40:57,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 43 transitions, 164 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:57,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:40:57,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2023-11-28 20:40:57,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:40:57,918 INFO L124 PetriNetUnfolderBase]: 242/603 cut-off events. [2023-11-28 20:40:57,919 INFO L125 PetriNetUnfolderBase]: For 303/303 co-relation queries the response was YES. [2023-11-28 20:40:57,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1325 conditions, 603 events. 242/603 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2959 event pairs, 108 based on Foata normal form. 0/558 useless extension candidates. Maximal degree in co-relation 1270. Up to 262 conditions per place. [2023-11-28 20:40:57,925 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 68 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2023-11-28 20:40:57,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 87 transitions, 454 flow [2023-11-28 20:40:57,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 20:40:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-28 20:40:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2023-11-28 20:40:57,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6006944444444444 [2023-11-28 20:40:57,926 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 173 transitions. [2023-11-28 20:40:57,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 173 transitions. [2023-11-28 20:40:57,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:40:57,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 173 transitions. [2023-11-28 20:40:57,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:57,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 36.0) internal successors, (324), 9 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:57,929 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 36.0) internal successors, (324), 9 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:57,929 INFO L175 Difference]: Start difference. First operand has 61 places, 43 transitions, 164 flow. Second operand 8 states and 173 transitions. [2023-11-28 20:40:57,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 87 transitions, 454 flow [2023-11-28 20:40:57,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 442 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-28 20:40:57,933 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 232 flow [2023-11-28 20:40:57,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=232, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2023-11-28 20:40:57,934 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 33 predicate places. [2023-11-28 20:40:57,934 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 232 flow [2023-11-28 20:40:57,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:57,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:40:57,934 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:40:57,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-28 20:40:57,934 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:40:57,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:57,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2103030549, now seen corresponding path program 1 times [2023-11-28 20:40:57,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:57,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037300913] [2023-11-28 20:40:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:57,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:40:58,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:58,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037300913] [2023-11-28 20:40:58,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037300913] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:40:58,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:40:58,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:40:58,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232127215] [2023-11-28 20:40:58,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:40:58,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:40:58,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:58,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:40:58,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:40:58,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2023-11-28 20:40:58,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:58,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:40:58,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2023-11-28 20:40:58,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:40:58,315 INFO L124 PetriNetUnfolderBase]: 226/566 cut-off events. [2023-11-28 20:40:58,315 INFO L125 PetriNetUnfolderBase]: For 462/462 co-relation queries the response was YES. [2023-11-28 20:40:58,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 566 events. 226/566 cut-off events. For 462/462 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2761 event pairs, 40 based on Foata normal form. 0/543 useless extension candidates. Maximal degree in co-relation 1419. Up to 260 conditions per place. [2023-11-28 20:40:58,321 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 50 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2023-11-28 20:40:58,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 452 flow [2023-11-28 20:40:58,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:40:58,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 20:40:58,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2023-11-28 20:40:58,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5601851851851852 [2023-11-28 20:40:58,323 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 121 transitions. [2023-11-28 20:40:58,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 121 transitions. [2023-11-28 20:40:58,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:40:58,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 121 transitions. [2023-11-28 20:40:58,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:58,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:58,325 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:58,325 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 232 flow. Second operand 6 states and 121 transitions. [2023-11-28 20:40:58,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 452 flow [2023-11-28 20:40:58,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 74 transitions, 451 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:40:58,330 INFO L231 Difference]: Finished difference. Result has 76 places, 57 transitions, 337 flow [2023-11-28 20:40:58,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=76, PETRI_TRANSITIONS=57} [2023-11-28 20:40:58,331 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 40 predicate places. [2023-11-28 20:40:58,331 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 57 transitions, 337 flow [2023-11-28 20:40:58,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:58,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:40:58,332 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:40:58,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-28 20:40:58,332 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:40:58,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:58,332 INFO L85 PathProgramCache]: Analyzing trace with hash -626274365, now seen corresponding path program 1 times [2023-11-28 20:40:58,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:58,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981869723] [2023-11-28 20:40:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:58,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:40:58,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:58,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981869723] [2023-11-28 20:40:58,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981869723] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:40:58,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126410424] [2023-11-28 20:40:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:58,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:58,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:40:58,409 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:40:58,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:40:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:58,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:40:58,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:40:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:40:58,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:40:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:40:58,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126410424] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:40:58,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:40:58,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-28 20:40:58,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875056416] [2023-11-28 20:40:58,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:40:58,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:40:58,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:58,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:40:58,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:40:58,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-28 20:40:58,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 57 transitions, 337 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:58,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:40:58,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-28 20:40:58,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:40:58,848 INFO L124 PetriNetUnfolderBase]: 404/997 cut-off events. [2023-11-28 20:40:58,849 INFO L125 PetriNetUnfolderBase]: For 1608/1608 co-relation queries the response was YES. [2023-11-28 20:40:58,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2854 conditions, 997 events. 404/997 cut-off events. For 1608/1608 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4643 event pairs, 69 based on Foata normal form. 42/1039 useless extension candidates. Maximal degree in co-relation 2791. Up to 182 conditions per place. [2023-11-28 20:40:58,858 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 98 selfloop transitions, 6 changer transitions 0/114 dead transitions. [2023-11-28 20:40:58,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 114 transitions, 821 flow [2023-11-28 20:40:58,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:40:58,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 20:40:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2023-11-28 20:40:58,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7638888888888888 [2023-11-28 20:40:58,859 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 165 transitions. [2023-11-28 20:40:58,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 165 transitions. [2023-11-28 20:40:58,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:40:58,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 165 transitions. [2023-11-28 20:40:58,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:58,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:58,861 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:58,861 INFO L175 Difference]: Start difference. First operand has 76 places, 57 transitions, 337 flow. Second operand 6 states and 165 transitions. [2023-11-28 20:40:58,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 114 transitions, 821 flow [2023-11-28 20:40:58,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 114 transitions, 820 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:40:58,868 INFO L231 Difference]: Finished difference. Result has 84 places, 60 transitions, 396 flow [2023-11-28 20:40:58,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=396, PETRI_PLACES=84, PETRI_TRANSITIONS=60} [2023-11-28 20:40:58,869 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 48 predicate places. [2023-11-28 20:40:58,869 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 60 transitions, 396 flow [2023-11-28 20:40:58,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:58,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:40:58,870 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:40:58,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-28 20:40:59,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:59,071 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:40:59,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:59,071 INFO L85 PathProgramCache]: Analyzing trace with hash -520403365, now seen corresponding path program 1 times [2023-11-28 20:40:59,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:59,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185350375] [2023-11-28 20:40:59,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:59,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:40:59,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:59,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185350375] [2023-11-28 20:40:59,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185350375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:40:59,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906555705] [2023-11-28 20:40:59,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:59,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:59,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:40:59,446 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:40:59,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:40:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:59,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-28 20:40:59,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:40:59,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:40:59,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-28 20:40:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:40:59,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:41:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:41:00,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906555705] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:41:00,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:41:00,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2023-11-28 20:41:00,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738726805] [2023-11-28 20:41:00,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:41:00,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-28 20:41:00,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:00,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-28 20:41:00,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-11-28 20:41:00,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2023-11-28 20:41:00,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 60 transitions, 396 flow. Second operand has 20 states, 20 states have (on average 15.15) internal successors, (303), 20 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:00,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:41:00,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2023-11-28 20:41:00,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:41:01,935 INFO L124 PetriNetUnfolderBase]: 952/2144 cut-off events. [2023-11-28 20:41:01,935 INFO L125 PetriNetUnfolderBase]: For 4668/4672 co-relation queries the response was YES. [2023-11-28 20:41:01,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6779 conditions, 2144 events. 952/2144 cut-off events. For 4668/4672 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 11199 event pairs, 117 based on Foata normal form. 294/2438 useless extension candidates. Maximal degree in co-relation 6713. Up to 314 conditions per place. [2023-11-28 20:41:01,959 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 195 selfloop transitions, 41 changer transitions 0/244 dead transitions. [2023-11-28 20:41:01,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 244 transitions, 1932 flow [2023-11-28 20:41:01,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-28 20:41:01,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-28 20:41:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 466 transitions. [2023-11-28 20:41:01,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5883838383838383 [2023-11-28 20:41:01,962 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 466 transitions. [2023-11-28 20:41:01,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 466 transitions. [2023-11-28 20:41:01,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:41:01,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 466 transitions. [2023-11-28 20:41:01,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 21.181818181818183) internal successors, (466), 22 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:01,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:01,968 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:01,969 INFO L175 Difference]: Start difference. First operand has 84 places, 60 transitions, 396 flow. Second operand 22 states and 466 transitions. [2023-11-28 20:41:01,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 244 transitions, 1932 flow [2023-11-28 20:41:01,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 244 transitions, 1832 flow, removed 40 selfloop flow, removed 1 redundant places. [2023-11-28 20:41:01,991 INFO L231 Difference]: Finished difference. Result has 117 places, 84 transitions, 824 flow [2023-11-28 20:41:01,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=824, PETRI_PLACES=117, PETRI_TRANSITIONS=84} [2023-11-28 20:41:01,992 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 81 predicate places. [2023-11-28 20:41:01,992 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 84 transitions, 824 flow [2023-11-28 20:41:01,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 15.15) internal successors, (303), 20 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:01,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:41:01,993 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:41:01,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:41:02,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:02,196 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:41:02,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:02,197 INFO L85 PathProgramCache]: Analyzing trace with hash -554271216, now seen corresponding path program 1 times [2023-11-28 20:41:02,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:02,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121826193] [2023-11-28 20:41:02,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:02,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:02,538 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:41:02,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:02,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121826193] [2023-11-28 20:41:02,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121826193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:41:02,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166594823] [2023-11-28 20:41:02,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:02,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:02,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:41:02,540 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:41:02,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:41:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:02,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-28 20:41:02,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:41:02,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:41:02,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-28 20:41:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:41:02,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:41:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:41:03,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166594823] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:41:03,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:41:03,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2023-11-28 20:41:03,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019087551] [2023-11-28 20:41:03,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:41:03,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-28 20:41:03,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:03,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-28 20:41:03,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-11-28 20:41:03,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2023-11-28 20:41:03,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 84 transitions, 824 flow. Second operand has 20 states, 20 states have (on average 15.15) internal successors, (303), 20 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:03,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:41:03,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2023-11-28 20:41:03,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:41:04,559 INFO L124 PetriNetUnfolderBase]: 1115/2494 cut-off events. [2023-11-28 20:41:04,559 INFO L125 PetriNetUnfolderBase]: For 10262/10262 co-relation queries the response was YES. [2023-11-28 20:41:04,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8869 conditions, 2494 events. 1115/2494 cut-off events. For 10262/10262 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 13599 event pairs, 121 based on Foata normal form. 224/2718 useless extension candidates. Maximal degree in co-relation 8787. Up to 372 conditions per place. [2023-11-28 20:41:04,586 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 229 selfloop transitions, 24 changer transitions 0/260 dead transitions. [2023-11-28 20:41:04,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 260 transitions, 2958 flow [2023-11-28 20:41:04,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 20:41:04,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-28 20:41:04,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 302 transitions. [2023-11-28 20:41:04,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6452991452991453 [2023-11-28 20:41:04,589 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 302 transitions. [2023-11-28 20:41:04,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 302 transitions. [2023-11-28 20:41:04,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:41:04,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 302 transitions. [2023-11-28 20:41:04,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 23.23076923076923) internal successors, (302), 13 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:04,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 36.0) internal successors, (504), 14 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:04,592 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 36.0) internal successors, (504), 14 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:04,592 INFO L175 Difference]: Start difference. First operand has 117 places, 84 transitions, 824 flow. Second operand 13 states and 302 transitions. [2023-11-28 20:41:04,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 260 transitions, 2958 flow [2023-11-28 20:41:04,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 260 transitions, 2496 flow, removed 183 selfloop flow, removed 8 redundant places. [2023-11-28 20:41:04,625 INFO L231 Difference]: Finished difference. Result has 124 places, 87 transitions, 780 flow [2023-11-28 20:41:04,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=780, PETRI_PLACES=124, PETRI_TRANSITIONS=87} [2023-11-28 20:41:04,626 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 88 predicate places. [2023-11-28 20:41:04,627 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 87 transitions, 780 flow [2023-11-28 20:41:04,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 15.15) internal successors, (303), 20 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:04,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:41:04,627 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:41:04,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:41:04,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-28 20:41:04,830 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:41:04,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:04,830 INFO L85 PathProgramCache]: Analyzing trace with hash 835047134, now seen corresponding path program 2 times [2023-11-28 20:41:04,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:04,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8231604] [2023-11-28 20:41:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:04,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:41:04,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:04,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8231604] [2023-11-28 20:41:04,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8231604] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:41:04,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805812833] [2023-11-28 20:41:04,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:41:04,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:04,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:41:04,966 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:41:04,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:41:05,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-28 20:41:05,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:41:05,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:41:05,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:41:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-11-28 20:41:05,252 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:41:05,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805812833] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:41:05,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:41:05,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2023-11-28 20:41:05,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759662778] [2023-11-28 20:41:05,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:41:05,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:41:05,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:05,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:41:05,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:41:05,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2023-11-28 20:41:05,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 87 transitions, 780 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:05,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:41:05,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2023-11-28 20:41:05,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:41:05,835 INFO L124 PetriNetUnfolderBase]: 1083/2447 cut-off events. [2023-11-28 20:41:05,836 INFO L125 PetriNetUnfolderBase]: For 7954/7954 co-relation queries the response was YES. [2023-11-28 20:41:05,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8957 conditions, 2447 events. 1083/2447 cut-off events. For 7954/7954 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 13501 event pairs, 955 based on Foata normal form. 0/2446 useless extension candidates. Maximal degree in co-relation 8872. Up to 1986 conditions per place. [2023-11-28 20:41:05,856 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 70 selfloop transitions, 13 changer transitions 1/91 dead transitions. [2023-11-28 20:41:05,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 91 transitions, 980 flow [2023-11-28 20:41:05,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:41:05,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:41:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2023-11-28 20:41:05,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2023-11-28 20:41:05,857 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 86 transitions. [2023-11-28 20:41:05,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 86 transitions. [2023-11-28 20:41:05,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:41:05,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 86 transitions. [2023-11-28 20:41:05,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:05,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:05,859 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:05,859 INFO L175 Difference]: Start difference. First operand has 124 places, 87 transitions, 780 flow. Second operand 4 states and 86 transitions. [2023-11-28 20:41:05,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 91 transitions, 980 flow [2023-11-28 20:41:05,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 91 transitions, 874 flow, removed 28 selfloop flow, removed 12 redundant places. [2023-11-28 20:41:05,902 INFO L231 Difference]: Finished difference. Result has 114 places, 86 transitions, 698 flow [2023-11-28 20:41:05,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=698, PETRI_PLACES=114, PETRI_TRANSITIONS=86} [2023-11-28 20:41:05,903 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 78 predicate places. [2023-11-28 20:41:05,903 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 86 transitions, 698 flow [2023-11-28 20:41:05,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:05,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:41:05,903 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-28 20:41:05,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:41:06,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 20:41:06,104 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:41:06,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:06,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1242891306, now seen corresponding path program 2 times [2023-11-28 20:41:06,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:06,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222474055] [2023-11-28 20:41:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:06,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:41:06,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:06,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222474055] [2023-11-28 20:41:06,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222474055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:41:06,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711352582] [2023-11-28 20:41:06,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:41:06,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:06,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:41:06,690 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:41:06,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:41:06,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:41:06,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:41:06,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-28 20:41:06,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:41:06,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:41:06,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-28 20:41:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:41:07,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:41:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:41:07,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711352582] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:41:07,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:41:07,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 29 [2023-11-28 20:41:07,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183303520] [2023-11-28 20:41:07,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:41:07,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-28 20:41:07,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:07,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-28 20:41:07,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2023-11-28 20:41:08,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2023-11-28 20:41:08,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 86 transitions, 698 flow. Second operand has 31 states, 31 states have (on average 16.129032258064516) internal successors, (500), 31 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:08,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:41:08,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2023-11-28 20:41:08,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:41:11,188 INFO L124 PetriNetUnfolderBase]: 2335/5134 cut-off events. [2023-11-28 20:41:11,188 INFO L125 PetriNetUnfolderBase]: For 22898/22908 co-relation queries the response was YES. [2023-11-28 20:41:11,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16756 conditions, 5134 events. 2335/5134 cut-off events. For 22898/22908 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 29052 event pairs, 155 based on Foata normal form. 408/5542 useless extension candidates. Maximal degree in co-relation 16674. Up to 577 conditions per place. [2023-11-28 20:41:11,222 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 498 selfloop transitions, 89 changer transitions 1/594 dead transitions. [2023-11-28 20:41:11,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 594 transitions, 4534 flow [2023-11-28 20:41:11,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-28 20:41:11,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-28 20:41:11,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 962 transitions. [2023-11-28 20:41:11,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5809178743961353 [2023-11-28 20:41:11,227 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 962 transitions. [2023-11-28 20:41:11,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 962 transitions. [2023-11-28 20:41:11,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:41:11,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 962 transitions. [2023-11-28 20:41:11,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 20.91304347826087) internal successors, (962), 46 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:11,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 36.0) internal successors, (1692), 47 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:11,237 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 36.0) internal successors, (1692), 47 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:11,237 INFO L175 Difference]: Start difference. First operand has 114 places, 86 transitions, 698 flow. Second operand 46 states and 962 transitions. [2023-11-28 20:41:11,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 594 transitions, 4534 flow [2023-11-28 20:41:11,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 594 transitions, 4472 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-28 20:41:11,312 INFO L231 Difference]: Finished difference. Result has 182 places, 137 transitions, 1559 flow [2023-11-28 20:41:11,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1559, PETRI_PLACES=182, PETRI_TRANSITIONS=137} [2023-11-28 20:41:11,313 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 146 predicate places. [2023-11-28 20:41:11,313 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 137 transitions, 1559 flow [2023-11-28 20:41:11,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 16.129032258064516) internal successors, (500), 31 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:11,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:41:11,314 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-28 20:41:11,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 20:41:11,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-28 20:41:11,515 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:41:11,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:11,515 INFO L85 PathProgramCache]: Analyzing trace with hash -678616469, now seen corresponding path program 2 times [2023-11-28 20:41:11,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:11,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103164042] [2023-11-28 20:41:11,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:11,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:41:12,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:12,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103164042] [2023-11-28 20:41:12,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103164042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:41:12,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79485842] [2023-11-28 20:41:12,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:41:12,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:12,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:41:12,149 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:41:12,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:41:12,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:41:12,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:41:12,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-28 20:41:12,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:41:12,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:41:12,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-28 20:41:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:41:12,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:41:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 42 proven. 16 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:41:13,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79485842] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:41:13,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:41:13,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 29 [2023-11-28 20:41:13,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291481202] [2023-11-28 20:41:13,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:41:13,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-28 20:41:13,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:13,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-28 20:41:13,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2023-11-28 20:41:13,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2023-11-28 20:41:13,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 137 transitions, 1559 flow. Second operand has 31 states, 31 states have (on average 16.129032258064516) internal successors, (500), 31 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:13,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:41:13,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2023-11-28 20:41:13,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:41:15,953 INFO L124 PetriNetUnfolderBase]: 2709/5938 cut-off events. [2023-11-28 20:41:15,953 INFO L125 PetriNetUnfolderBase]: For 30453/30453 co-relation queries the response was YES. [2023-11-28 20:41:15,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21413 conditions, 5938 events. 2709/5938 cut-off events. For 30453/30453 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 35653 event pairs, 0 based on Foata normal form. 204/6142 useless extension candidates. Maximal degree in co-relation 21305. Up to 680 conditions per place. [2023-11-28 20:41:15,994 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 501 selfloop transitions, 45 changer transitions 15/567 dead transitions. [2023-11-28 20:41:15,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 567 transitions, 7608 flow [2023-11-28 20:41:15,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-28 20:41:15,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-28 20:41:15,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 387 transitions. [2023-11-28 20:41:15,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6323529411764706 [2023-11-28 20:41:15,996 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 387 transitions. [2023-11-28 20:41:15,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 387 transitions. [2023-11-28 20:41:15,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:41:15,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 387 transitions. [2023-11-28 20:41:15,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 22.764705882352942) internal successors, (387), 17 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:15,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 36.0) internal successors, (648), 18 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:15,999 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 36.0) internal successors, (648), 18 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:15,999 INFO L175 Difference]: Start difference. First operand has 182 places, 137 transitions, 1559 flow. Second operand 17 states and 387 transitions. [2023-11-28 20:41:15,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 567 transitions, 7608 flow [2023-11-28 20:41:16,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 567 transitions, 6759 flow, removed 285 selfloop flow, removed 21 redundant places. [2023-11-28 20:41:16,143 INFO L231 Difference]: Finished difference. Result has 176 places, 137 transitions, 1468 flow [2023-11-28 20:41:16,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1468, PETRI_PLACES=176, PETRI_TRANSITIONS=137} [2023-11-28 20:41:16,144 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 140 predicate places. [2023-11-28 20:41:16,145 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 137 transitions, 1468 flow [2023-11-28 20:41:16,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 16.129032258064516) internal successors, (500), 31 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:16,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:41:16,145 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:41:16,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-28 20:41:16,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-28 20:41:16,347 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:41:16,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:16,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1298821355, now seen corresponding path program 1 times [2023-11-28 20:41:16,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:16,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497160253] [2023-11-28 20:41:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:16,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:41:16,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:16,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497160253] [2023-11-28 20:41:16,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497160253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:41:16,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653271205] [2023-11-28 20:41:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:16,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:16,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:41:16,498 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:41:16,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:41:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:16,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-28 20:41:16,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:41:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:41:16,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:41:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:41:16,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653271205] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:41:16,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:41:16,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-11-28 20:41:16,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939198091] [2023-11-28 20:41:16,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:41:16,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-28 20:41:16,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:16,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-28 20:41:16,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-28 20:41:16,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-28 20:41:16,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 137 transitions, 1468 flow. Second operand has 13 states, 13 states have (on average 20.53846153846154) internal successors, (267), 13 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:16,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:41:16,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-28 20:41:16,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:41:18,935 INFO L124 PetriNetUnfolderBase]: 4345/9496 cut-off events. [2023-11-28 20:41:18,935 INFO L125 PetriNetUnfolderBase]: For 29112/29112 co-relation queries the response was YES. [2023-11-28 20:41:18,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32441 conditions, 9496 events. 4345/9496 cut-off events. For 29112/29112 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 60156 event pairs, 165 based on Foata normal form. 335/9831 useless extension candidates. Maximal degree in co-relation 32336. Up to 1042 conditions per place. [2023-11-28 20:41:18,996 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 453 selfloop transitions, 12 changer transitions 0/471 dead transitions. [2023-11-28 20:41:18,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 471 transitions, 5165 flow [2023-11-28 20:41:18,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:41:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-28 20:41:18,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 330 transitions. [2023-11-28 20:41:18,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7638888888888888 [2023-11-28 20:41:18,998 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 330 transitions. [2023-11-28 20:41:18,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 330 transitions. [2023-11-28 20:41:18,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:41:18,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 330 transitions. [2023-11-28 20:41:18,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 27.5) internal successors, (330), 12 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:19,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 36.0) internal successors, (468), 13 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:19,000 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 36.0) internal successors, (468), 13 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:19,000 INFO L175 Difference]: Start difference. First operand has 176 places, 137 transitions, 1468 flow. Second operand 12 states and 330 transitions. [2023-11-28 20:41:19,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 471 transitions, 5165 flow [2023-11-28 20:41:19,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 471 transitions, 4657 flow, removed 53 selfloop flow, removed 35 redundant places. [2023-11-28 20:41:19,070 INFO L231 Difference]: Finished difference. Result has 157 places, 142 transitions, 1584 flow [2023-11-28 20:41:19,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1584, PETRI_PLACES=157, PETRI_TRANSITIONS=142} [2023-11-28 20:41:19,070 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 121 predicate places. [2023-11-28 20:41:19,071 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 142 transitions, 1584 flow [2023-11-28 20:41:19,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.53846153846154) internal successors, (267), 13 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:19,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:41:19,071 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-11-28 20:41:19,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 20:41:19,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 20:41:19,271 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:41:19,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:19,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1870445814, now seen corresponding path program 3 times [2023-11-28 20:41:19,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:19,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853013872] [2023-11-28 20:41:19,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:19,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 291 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:41:19,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:19,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853013872] [2023-11-28 20:41:19,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853013872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:41:19,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582937394] [2023-11-28 20:41:19,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:41:19,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:19,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:41:19,650 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:41:19,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 20:41:19,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 20:41:19,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:41:19,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-28 20:41:19,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:41:19,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:41:19,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-28 20:41:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 64 proven. 30 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2023-11-28 20:41:20,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:41:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2023-11-28 20:41:21,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582937394] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:41:21,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:41:21,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 25 [2023-11-28 20:41:21,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451148478] [2023-11-28 20:41:21,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:41:21,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-28 20:41:21,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:21,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-28 20:41:21,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:41:21,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2023-11-28 20:41:21,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 142 transitions, 1584 flow. Second operand has 25 states, 25 states have (on average 17.32) internal successors, (433), 25 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:21,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:41:21,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2023-11-28 20:41:21,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:41:24,504 INFO L124 PetriNetUnfolderBase]: 3956/8707 cut-off events. [2023-11-28 20:41:24,504 INFO L125 PetriNetUnfolderBase]: For 17804/17814 co-relation queries the response was YES. [2023-11-28 20:41:24,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28449 conditions, 8707 events. 3956/8707 cut-off events. For 17804/17814 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 54303 event pairs, 69 based on Foata normal form. 64/8771 useless extension candidates. Maximal degree in co-relation 28362. Up to 970 conditions per place. [2023-11-28 20:41:24,551 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 584 selfloop transitions, 22 changer transitions 107/718 dead transitions. [2023-11-28 20:41:24,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 718 transitions, 6102 flow [2023-11-28 20:41:24,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-28 20:41:24,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-28 20:41:24,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 598 transitions. [2023-11-28 20:41:24,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6644444444444444 [2023-11-28 20:41:24,553 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 598 transitions. [2023-11-28 20:41:24,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 598 transitions. [2023-11-28 20:41:24,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:41:24,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 598 transitions. [2023-11-28 20:41:24,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 23.92) internal successors, (598), 25 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:24,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 36.0) internal successors, (936), 26 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:24,557 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 36.0) internal successors, (936), 26 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:24,557 INFO L175 Difference]: Start difference. First operand has 157 places, 142 transitions, 1584 flow. Second operand 25 states and 598 transitions. [2023-11-28 20:41:24,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 718 transitions, 6102 flow [2023-11-28 20:41:24,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 718 transitions, 5618 flow, removed 18 selfloop flow, removed 30 redundant places. [2023-11-28 20:41:24,667 INFO L231 Difference]: Finished difference. Result has 149 places, 85 transitions, 746 flow [2023-11-28 20:41:24,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1188, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=746, PETRI_PLACES=149, PETRI_TRANSITIONS=85} [2023-11-28 20:41:24,668 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 113 predicate places. [2023-11-28 20:41:24,668 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 85 transitions, 746 flow [2023-11-28 20:41:24,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 17.32) internal successors, (433), 25 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:24,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:41:24,669 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:41:24,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-28 20:41:24,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 20:41:24,869 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:41:24,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:24,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1686582302, now seen corresponding path program 2 times [2023-11-28 20:41:24,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:24,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067285675] [2023-11-28 20:41:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:24,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2023-11-28 20:41:25,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:25,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067285675] [2023-11-28 20:41:25,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067285675] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:41:25,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288367066] [2023-11-28 20:41:25,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:41:25,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:25,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:41:25,278 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:41:25,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 20:41:25,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:41:25,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:41:25,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 20:41:25,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:41:25,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:41:25,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-28 20:41:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 9 proven. 37 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2023-11-28 20:41:25,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:41:26,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:41:26,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-11-28 20:41:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 9 proven. 37 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2023-11-28 20:41:26,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288367066] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:41:26,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:41:26,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-11-28 20:41:26,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667518494] [2023-11-28 20:41:26,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:41:26,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-28 20:41:26,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:26,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-28 20:41:26,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:41:26,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2023-11-28 20:41:26,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 85 transitions, 746 flow. Second operand has 16 states, 16 states have (on average 12.8125) internal successors, (205), 16 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:26,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:41:26,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2023-11-28 20:41:26,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:41:28,674 INFO L124 PetriNetUnfolderBase]: 6664/14409 cut-off events. [2023-11-28 20:41:28,674 INFO L125 PetriNetUnfolderBase]: For 25508/25508 co-relation queries the response was YES. [2023-11-28 20:41:28,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43850 conditions, 14409 events. 6664/14409 cut-off events. For 25508/25508 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 100288 event pairs, 50 based on Foata normal form. 40/14449 useless extension candidates. Maximal degree in co-relation 43782. Up to 4800 conditions per place. [2023-11-28 20:41:28,727 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 60 selfloop transitions, 88 changer transitions 115/266 dead transitions. [2023-11-28 20:41:28,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 266 transitions, 2670 flow [2023-11-28 20:41:28,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 20:41:28,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-28 20:41:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 221 transitions. [2023-11-28 20:41:28,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384920634920635 [2023-11-28 20:41:28,729 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 221 transitions. [2023-11-28 20:41:28,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 221 transitions. [2023-11-28 20:41:28,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:41:28,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 221 transitions. [2023-11-28 20:41:28,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 15.785714285714286) internal successors, (221), 14 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:28,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 36.0) internal successors, (540), 15 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:28,731 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 36.0) internal successors, (540), 15 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:28,731 INFO L175 Difference]: Start difference. First operand has 149 places, 85 transitions, 746 flow. Second operand 14 states and 221 transitions. [2023-11-28 20:41:28,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 266 transitions, 2670 flow [2023-11-28 20:41:28,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 266 transitions, 2373 flow, removed 20 selfloop flow, removed 26 redundant places. [2023-11-28 20:41:28,792 INFO L231 Difference]: Finished difference. Result has 129 places, 126 transitions, 1253 flow [2023-11-28 20:41:28,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1253, PETRI_PLACES=129, PETRI_TRANSITIONS=126} [2023-11-28 20:41:28,793 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 93 predicate places. [2023-11-28 20:41:28,793 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 126 transitions, 1253 flow [2023-11-28 20:41:28,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.8125) internal successors, (205), 16 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:28,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:41:28,793 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:41:28,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 20:41:28,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:28,994 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-28 20:41:28,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:28,994 INFO L85 PathProgramCache]: Analyzing trace with hash 162579566, now seen corresponding path program 3 times [2023-11-28 20:41:28,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:28,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357849247] [2023-11-28 20:41:28,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:28,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-11-28 20:41:29,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:29,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357849247] [2023-11-28 20:41:29,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357849247] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:41:29,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996226179] [2023-11-28 20:41:29,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:41:29,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:29,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:41:29,373 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:41:29,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 20:41:29,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-28 20:41:29,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:41:29,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-28 20:41:29,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:41:29,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:41:29,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-28 20:41:29,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:41:29,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-28 20:41:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2023-11-28 20:41:29,951 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:41:29,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996226179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:41:29,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:41:29,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2023-11-28 20:41:29,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443138604] [2023-11-28 20:41:29,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:41:29,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:41:29,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:29,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:41:29,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-28 20:41:29,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2023-11-28 20:41:29,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 126 transitions, 1253 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:29,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:41:29,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2023-11-28 20:41:29,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:41:31,122 INFO L124 PetriNetUnfolderBase]: 2660/6885 cut-off events. [2023-11-28 20:41:31,123 INFO L125 PetriNetUnfolderBase]: For 14263/14265 co-relation queries the response was YES. [2023-11-28 20:41:31,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23314 conditions, 6885 events. 2660/6885 cut-off events. For 14263/14265 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 46316 event pairs, 1936 based on Foata normal form. 40/6925 useless extension candidates. Maximal degree in co-relation 23284. Up to 5620 conditions per place. [2023-11-28 20:41:31,145 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 0 selfloop transitions, 0 changer transitions 150/150 dead transitions. [2023-11-28 20:41:31,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 150 transitions, 1738 flow [2023-11-28 20:41:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:41:31,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 20:41:31,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2023-11-28 20:41:31,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046296296296297 [2023-11-28 20:41:31,146 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 109 transitions. [2023-11-28 20:41:31,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 109 transitions. [2023-11-28 20:41:31,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:41:31,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 109 transitions. [2023-11-28 20:41:31,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:31,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:31,147 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:31,147 INFO L175 Difference]: Start difference. First operand has 129 places, 126 transitions, 1253 flow. Second operand 6 states and 109 transitions. [2023-11-28 20:41:31,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 150 transitions, 1738 flow [2023-11-28 20:41:31,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 150 transitions, 1645 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-28 20:41:31,186 INFO L231 Difference]: Finished difference. Result has 126 places, 0 transitions, 0 flow [2023-11-28 20:41:31,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=126, PETRI_TRANSITIONS=0} [2023-11-28 20:41:31,186 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 90 predicate places. [2023-11-28 20:41:31,186 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 0 transitions, 0 flow [2023-11-28 20:41:31,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:31,189 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 16 remaining) [2023-11-28 20:41:31,189 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-11-28 20:41:31,189 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (13 of 16 remaining) [2023-11-28 20:41:31,190 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-11-28 20:41:31,190 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-11-28 20:41:31,190 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-11-28 20:41:31,190 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2023-11-28 20:41:31,190 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 16 remaining) [2023-11-28 20:41:31,190 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-11-28 20:41:31,190 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-11-28 20:41:31,190 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-11-28 20:41:31,190 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-11-28 20:41:31,191 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2023-11-28 20:41:31,191 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2023-11-28 20:41:31,191 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2023-11-28 20:41:31,191 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 16 remaining) [2023-11-28 20:41:31,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-28 20:41:31,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:31,392 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-28 20:41:31,395 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-28 20:41:31,396 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-28 20:41:31,398 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 08:41:31 BasicIcfg [2023-11-28 20:41:31,399 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-28 20:41:31,399 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-28 20:41:31,399 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-28 20:41:31,399 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-28 20:41:31,400 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:40:54" (3/4) ... [2023-11-28 20:41:31,401 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-28 20:41:31,403 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2023-11-28 20:41:31,406 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 32 nodes and edges [2023-11-28 20:41:31,406 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-11-28 20:41:31,407 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-28 20:41:31,407 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-28 20:41:31,465 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-28 20:41:31,466 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/witness.yml [2023-11-28 20:41:31,466 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-28 20:41:31,466 INFO L158 Benchmark]: Toolchain (without parser) took 38675.55ms. Allocated memory was 144.7MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 102.3MB in the beginning and 756.4MB in the end (delta: -654.1MB). Peak memory consumption was 682.8MB. Max. memory is 16.1GB. [2023-11-28 20:41:31,466 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 107.0MB. Free memory is still 79.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-28 20:41:31,467 INFO L158 Benchmark]: CACSL2BoogieTranslator took 673.74ms. Allocated memory is still 144.7MB. Free memory was 102.3MB in the beginning and 113.8MB in the end (delta: -11.4MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2023-11-28 20:41:31,467 INFO L158 Benchmark]: Boogie Procedure Inliner took 74.48ms. Allocated memory is still 144.7MB. Free memory was 113.8MB in the beginning and 111.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-28 20:41:31,468 INFO L158 Benchmark]: Boogie Preprocessor took 49.23ms. Allocated memory is still 144.7MB. Free memory was 111.9MB in the beginning and 109.0MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-28 20:41:31,468 INFO L158 Benchmark]: RCFGBuilder took 475.22ms. Allocated memory is still 144.7MB. Free memory was 109.0MB in the beginning and 85.9MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2023-11-28 20:41:31,468 INFO L158 Benchmark]: TraceAbstraction took 37328.64ms. Allocated memory was 144.7MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 84.6MB in the beginning and 761.1MB in the end (delta: -676.5MB). Peak memory consumption was 661.7MB. Max. memory is 16.1GB. [2023-11-28 20:41:31,469 INFO L158 Benchmark]: Witness Printer took 66.72ms. Allocated memory is still 1.5GB. Free memory was 761.1MB in the beginning and 756.4MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-28 20:41:31,471 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 107.0MB. Free memory is still 79.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 673.74ms. Allocated memory is still 144.7MB. Free memory was 102.3MB in the beginning and 113.8MB in the end (delta: -11.4MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 74.48ms. Allocated memory is still 144.7MB. Free memory was 113.8MB in the beginning and 111.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.23ms. Allocated memory is still 144.7MB. Free memory was 111.9MB in the beginning and 109.0MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 475.22ms. Allocated memory is still 144.7MB. Free memory was 109.0MB in the beginning and 85.9MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 37328.64ms. Allocated memory was 144.7MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 84.6MB in the beginning and 761.1MB in the end (delta: -676.5MB). Peak memory consumption was 661.7MB. Max. memory is 16.1GB. * Witness Printer took 66.72ms. Allocated memory is still 1.5GB. Free memory was 761.1MB in the beginning and 756.4MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 932]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 48 locations, 16 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 37.2s, OverallIterations: 20, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 21.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4808 SdHoareTripleChecker+Valid, 6.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4599 mSDsluCounter, 1758 SdHoareTripleChecker+Invalid, 5.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1754 mSDsCounter, 98 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10504 IncrementalHoareTripleChecker+Invalid, 10602 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 98 mSolverCounterUnsat, 4 mSDtfsCounter, 10504 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1207 GetRequests, 866 SyntacticMatches, 4 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2731 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1584occurred in iteration=17, InterpolantAutomatonStates: 220, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 10.6s InterpolantComputationTime, 1222 NumberOfCodeBlocks, 1042 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 1597 ConstructedInterpolants, 56 QuantifiedInterpolants, 16416 SizeOfPredicates, 53 NumberOfNonLiveVariables, 2545 ConjunctsInSsa, 181 ConjunctsInUnsatCore, 42 InterpolantComputations, 10 PerfectInterpolantSequences, 4323/5295 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-28 20:41:31,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc19a36b-bcf7-46e9-becd-d581ade96d5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE