./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI --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 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:01:44,418 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:01:44,509 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 22:01:44,515 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:01:44,516 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:01:44,543 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:01:44,544 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:01:44,544 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:01:44,545 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:01:44,546 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:01:44,546 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:01:44,547 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:01:44,548 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:01:44,548 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:01:44,549 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:01:44,550 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:01:44,550 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:01:44,551 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:01:44,552 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:01:44,552 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:01:44,553 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 22:01:44,554 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 22:01:44,554 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 22:01:44,555 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:01:44,555 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 22:01:44,556 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 22:01:44,556 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:01:44,557 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:01:44,557 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:01:44,558 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:01:44,558 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:01:44,559 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:01:44,559 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:01:44,560 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:01:44,560 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:01:44,561 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:01:44,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:01:44,562 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:01:44,562 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:01:44,562 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:01:44,563 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:01:44,563 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_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd [2023-11-24 22:01:44,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:01:44,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:01:44,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:01:44,915 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:01:44,915 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:01:44,917 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-11-24 22:01:47,989 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:01:48,192 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:01:48,193 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-11-24 22:01:48,202 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/data/4495c0c16/7831ae0e76fc4705b62c5311d678f7ca/FLAG287940411 [2023-11-24 22:01:48,215 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/data/4495c0c16/7831ae0e76fc4705b62c5311d678f7ca [2023-11-24 22:01:48,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:01:48,219 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:01:48,221 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:01:48,221 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:01:48,227 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:01:48,228 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:01:48" (1/1) ... [2023-11-24 22:01:48,229 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ab1ca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:48, skipping insertion in model container [2023-11-24 22:01:48,229 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:01:48" (1/1) ... [2023-11-24 22:01:48,257 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:01:48,525 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:01:48,541 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:01:48,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:01:48,579 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:01:48,580 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:01:48,587 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:01:48,588 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:48 WrapperNode [2023-11-24 22:01:48,588 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:01:48,589 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:01:48,589 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:01:48,589 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:01:48,597 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:48" (1/1) ... [2023-11-24 22:01:48,612 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:48" (1/1) ... [2023-11-24 22:01:48,632 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 58 [2023-11-24 22:01:48,633 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:01:48,634 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:01:48,634 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:01:48,634 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:01:48,644 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:48" (1/1) ... [2023-11-24 22:01:48,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:48" (1/1) ... [2023-11-24 22:01:48,647 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:48" (1/1) ... [2023-11-24 22:01:48,666 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-24 22:01:48,667 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:48" (1/1) ... [2023-11-24 22:01:48,667 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:48" (1/1) ... [2023-11-24 22:01:48,674 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:48" (1/1) ... [2023-11-24 22:01:48,677 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:48" (1/1) ... [2023-11-24 22:01:48,679 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:48" (1/1) ... [2023-11-24 22:01:48,681 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:48" (1/1) ... [2023-11-24 22:01:48,683 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:01:48,684 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:01:48,684 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:01:48,685 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:01:48,685 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:48" (1/1) ... [2023-11-24 22:01:48,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:01:48,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:01:48,719 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:01:48,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:01:48,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:01:48,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 22:01:48,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 22:01:48,769 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 22:01:48,770 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 22:01:48,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:01:48,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 22:01:48,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 22:01:48,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:01:48,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 22:01:48,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 22:01:48,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 22:01:48,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 22:01:48,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 22:01:48,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:01:48,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:01:48,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 22:01:48,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 22:01:48,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 22:01:48,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:01:48,777 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 22:01:48,942 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:01:48,945 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:01:49,264 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:01:49,492 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:01:49,493 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 22:01:49,493 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:01:49 BoogieIcfgContainer [2023-11-24 22:01:49,493 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:01:49,504 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:01:49,505 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:01:49,508 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:01:49,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:01:48" (1/3) ... [2023-11-24 22:01:49,510 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211bd3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:01:49, skipping insertion in model container [2023-11-24 22:01:49,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:48" (2/3) ... [2023-11-24 22:01:49,511 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211bd3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:01:49, skipping insertion in model container [2023-11-24 22:01:49,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:01:49" (3/3) ... [2023-11-24 22:01:49,515 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2023-11-24 22:01:49,537 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:01:49,537 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-24 22:01:49,537 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 22:01:49,609 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 22:01:49,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 36 transitions, 86 flow [2023-11-24 22:01:49,676 INFO L124 PetriNetUnfolderBase]: 2/34 cut-off events. [2023-11-24 22:01:49,676 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 22:01:49,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 34 events. 2/34 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 51 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2023-11-24 22:01:49,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 36 transitions, 86 flow [2023-11-24 22:01:49,683 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 33 transitions, 78 flow [2023-11-24 22:01:49,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:01:49,702 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;@21575e10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:01:49,702 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-24 22:01:49,706 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:01:49,706 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 22:01:49,706 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:01:49,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:49,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 22:01:49,707 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:01:49,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:49,713 INFO L85 PathProgramCache]: Analyzing trace with hash 8522, now seen corresponding path program 1 times [2023-11-24 22:01:49,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:49,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99831707] [2023-11-24 22:01:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:49,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:50,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:50,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99831707] [2023-11-24 22:01:50,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99831707] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:50,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:50,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:01:50,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31413081] [2023-11-24 22:01:50,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:50,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:50,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:50,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:50,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:50,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2023-11-24 22:01:50,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:50,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:50,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2023-11-24 22:01:50,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:01:50,216 INFO L124 PetriNetUnfolderBase]: 55/126 cut-off events. [2023-11-24 22:01:50,216 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-24 22:01:50,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 126 events. 55/126 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 343 event pairs, 34 based on Foata normal form. 1/112 useless extension candidates. Maximal degree in co-relation 191. Up to 95 conditions per place. [2023-11-24 22:01:50,221 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 15 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-11-24 22:01:50,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 102 flow [2023-11-24 22:01:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:50,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:01:50,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2023-11-24 22:01:50,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6203703703703703 [2023-11-24 22:01:50,236 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 67 transitions. [2023-11-24 22:01:50,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 67 transitions. [2023-11-24 22:01:50,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:01:50,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 67 transitions. [2023-11-24 22:01:50,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:50,247 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) [2023-11-24 22:01:50,247 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) [2023-11-24 22:01:50,250 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 78 flow. Second operand 3 states and 67 transitions. [2023-11-24 22:01:50,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 102 flow [2023-11-24 22:01:50,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 22:01:50,256 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 64 flow [2023-11-24 22:01:50,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-11-24 22:01:50,262 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-11-24 22:01:50,263 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 64 flow [2023-11-24 22:01:50,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:50,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:50,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 22:01:50,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:01:50,264 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:01:50,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:50,265 INFO L85 PathProgramCache]: Analyzing trace with hash 8523, now seen corresponding path program 1 times [2023-11-24 22:01:50,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:50,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882294227] [2023-11-24 22:01:50,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:50,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:50,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:50,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882294227] [2023-11-24 22:01:50,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882294227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:50,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:50,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:01:50,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44055900] [2023-11-24 22:01:50,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:50,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:50,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:50,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:50,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:50,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-24 22:01:50,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:50,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:50,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-24 22:01:50,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:01:50,657 INFO L124 PetriNetUnfolderBase]: 37/91 cut-off events. [2023-11-24 22:01:50,657 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-11-24 22:01:50,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 91 events. 37/91 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 238 event pairs, 22 based on Foata normal form. 10/92 useless extension candidates. Maximal degree in co-relation 160. Up to 67 conditions per place. [2023-11-24 22:01:50,660 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 13 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-24 22:01:50,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 27 transitions, 88 flow [2023-11-24 22:01:50,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:01:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2023-11-24 22:01:50,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2023-11-24 22:01:50,662 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 70 transitions. [2023-11-24 22:01:50,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 70 transitions. [2023-11-24 22:01:50,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:01:50,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 70 transitions. [2023-11-24 22:01:50,664 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) [2023-11-24 22:01:50,665 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) [2023-11-24 22:01:50,665 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) [2023-11-24 22:01:50,665 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 64 flow. Second operand 3 states and 70 transitions. [2023-11-24 22:01:50,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 27 transitions, 88 flow [2023-11-24 22:01:50,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 87 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:01:50,667 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 61 flow [2023-11-24 22:01:50,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-11-24 22:01:50,669 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-11-24 22:01:50,669 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 61 flow [2023-11-24 22:01:50,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:50,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:50,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:01:50,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:01:50,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:01:50,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:50,671 INFO L85 PathProgramCache]: Analyzing trace with hash 254099552, now seen corresponding path program 1 times [2023-11-24 22:01:50,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:50,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423163476] [2023-11-24 22:01:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:50,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:50,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:50,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423163476] [2023-11-24 22:01:50,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423163476] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:50,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:50,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:01:50,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6467400] [2023-11-24 22:01:50,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:50,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:50,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:50,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:50,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:50,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2023-11-24 22:01:50,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:50,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:50,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2023-11-24 22:01:50,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:01:50,831 INFO L124 PetriNetUnfolderBase]: 43/98 cut-off events. [2023-11-24 22:01:50,831 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-24 22:01:50,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 98 events. 43/98 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 233 event pairs, 26 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 179. Up to 79 conditions per place. [2023-11-24 22:01:50,833 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 15 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-24 22:01:50,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 89 flow [2023-11-24 22:01:50,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:50,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:01:50,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2023-11-24 22:01:50,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2023-11-24 22:01:50,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 66 transitions. [2023-11-24 22:01:50,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 66 transitions. [2023-11-24 22:01:50,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:01:50,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 66 transitions. [2023-11-24 22:01:50,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:50,838 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) [2023-11-24 22:01:50,838 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) [2023-11-24 22:01:50,838 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 61 flow. Second operand 3 states and 66 transitions. [2023-11-24 22:01:50,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 89 flow [2023-11-24 22:01:50,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:01:50,840 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 58 flow [2023-11-24 22:01:50,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-11-24 22:01:50,841 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -8 predicate places. [2023-11-24 22:01:50,841 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 58 flow [2023-11-24 22:01:50,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:50,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:50,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:01:50,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:01:50,843 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:01:50,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:50,843 INFO L85 PathProgramCache]: Analyzing trace with hash 254099553, now seen corresponding path program 1 times [2023-11-24 22:01:50,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:50,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323153115] [2023-11-24 22:01:50,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:50,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:50,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:50,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323153115] [2023-11-24 22:01:50,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323153115] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:50,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:50,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:01:50,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523637884] [2023-11-24 22:01:50,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:50,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:50,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:50,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:50,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:50,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-24 22:01:50,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:50,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:50,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-24 22:01:50,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:01:51,000 INFO L124 PetriNetUnfolderBase]: 37/85 cut-off events. [2023-11-24 22:01:51,001 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-11-24 22:01:51,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 85 events. 37/85 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 203 event pairs, 22 based on Foata normal form. 5/87 useless extension candidates. Maximal degree in co-relation 154. Up to 67 conditions per place. [2023-11-24 22:01:51,002 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 13 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-11-24 22:01:51,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 82 flow [2023-11-24 22:01:51,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:51,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:01:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2023-11-24 22:01:51,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2023-11-24 22:01:51,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 70 transitions. [2023-11-24 22:01:51,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 70 transitions. [2023-11-24 22:01:51,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:01:51,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 70 transitions. [2023-11-24 22:01:51,006 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) [2023-11-24 22:01:51,007 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) [2023-11-24 22:01:51,007 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) [2023-11-24 22:01:51,007 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 58 flow. Second operand 3 states and 70 transitions. [2023-11-24 22:01:51,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 82 flow [2023-11-24 22:01:51,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 23 transitions, 81 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:01:51,009 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 55 flow [2023-11-24 22:01:51,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-24 22:01:51,010 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -9 predicate places. [2023-11-24 22:01:51,010 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 55 flow [2023-11-24 22:01:51,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:51,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:51,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:51,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 22:01:51,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:01:51,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:51,012 INFO L85 PathProgramCache]: Analyzing trace with hash -308859051, now seen corresponding path program 1 times [2023-11-24 22:01:51,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:51,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873477169] [2023-11-24 22:01:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:51,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:51,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:51,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873477169] [2023-11-24 22:01:51,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873477169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:51,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:51,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:01:51,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944269642] [2023-11-24 22:01:51,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:51,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:51,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:51,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:51,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:51,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2023-11-24 22:01:51,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 55 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:51,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:51,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2023-11-24 22:01:51,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:01:51,327 INFO L124 PetriNetUnfolderBase]: 73/162 cut-off events. [2023-11-24 22:01:51,327 INFO L125 PetriNetUnfolderBase]: For 5/7 co-relation queries the response was YES. [2023-11-24 22:01:51,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 162 events. 73/162 cut-off events. For 5/7 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 538 event pairs, 22 based on Foata normal form. 1/160 useless extension candidates. Maximal degree in co-relation 298. Up to 74 conditions per place. [2023-11-24 22:01:51,329 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 20 selfloop transitions, 2 changer transitions 3/33 dead transitions. [2023-11-24 22:01:51,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 128 flow [2023-11-24 22:01:51,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:51,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:01:51,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2023-11-24 22:01:51,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7685185185185185 [2023-11-24 22:01:51,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 83 transitions. [2023-11-24 22:01:51,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 83 transitions. [2023-11-24 22:01:51,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:01:51,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 83 transitions. [2023-11-24 22:01:51,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 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) [2023-11-24 22:01:51,336 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) [2023-11-24 22:01:51,336 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) [2023-11-24 22:01:51,336 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 55 flow. Second operand 3 states and 83 transitions. [2023-11-24 22:01:51,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 128 flow [2023-11-24 22:01:51,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:01:51,338 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 66 flow [2023-11-24 22:01:51,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-11-24 22:01:51,340 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-11-24 22:01:51,340 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 66 flow [2023-11-24 22:01:51,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:51,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:51,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:51,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 22:01:51,341 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:01:51,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:51,342 INFO L85 PathProgramCache]: Analyzing trace with hash -457354806, now seen corresponding path program 1 times [2023-11-24 22:01:51,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:51,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700363358] [2023-11-24 22:01:51,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:51,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:51,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:51,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700363358] [2023-11-24 22:01:51,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700363358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:51,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:51,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:01:51,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692786161] [2023-11-24 22:01:51,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:51,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:01:51,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:51,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:01:51,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:01:51,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-24 22:01:51,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 66 flow. Second operand has 4 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) [2023-11-24 22:01:51,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:51,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-24 22:01:51,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:01:51,703 INFO L124 PetriNetUnfolderBase]: 142/274 cut-off events. [2023-11-24 22:01:51,703 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-24 22:01:51,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554 conditions, 274 events. 142/274 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1002 event pairs, 81 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 543. Up to 179 conditions per place. [2023-11-24 22:01:51,710 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 21 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2023-11-24 22:01:51,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 131 flow [2023-11-24 22:01:51,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:01:51,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:01:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2023-11-24 22:01:51,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6736111111111112 [2023-11-24 22:01:51,717 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 97 transitions. [2023-11-24 22:01:51,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 97 transitions. [2023-11-24 22:01:51,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:01:51,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 97 transitions. [2023-11-24 22:01:51,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:51,721 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) [2023-11-24 22:01:51,721 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) [2023-11-24 22:01:51,722 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 66 flow. Second operand 4 states and 97 transitions. [2023-11-24 22:01:51,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 131 flow [2023-11-24 22:01:51,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:01:51,728 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 78 flow [2023-11-24 22:01:51,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-11-24 22:01:51,732 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-11-24 22:01:51,733 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 78 flow [2023-11-24 22:01:51,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2023-11-24 22:01:51,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:51,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:51,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 22:01:51,734 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:01:51,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:51,735 INFO L85 PathProgramCache]: Analyzing trace with hash -613517268, now seen corresponding path program 1 times [2023-11-24 22:01:51,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:51,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40664558] [2023-11-24 22:01:51,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:51,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:52,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:52,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40664558] [2023-11-24 22:01:52,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40664558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:01:52,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583516417] [2023-11-24 22:01:52,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:52,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:01:52,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:01:52,295 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:01:52,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 22:01:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:52,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 22:01:52,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:52,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:01:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:52,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583516417] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:01:52,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:01:52,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 3] total 10 [2023-11-24 22:01:52,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068679496] [2023-11-24 22:01:52,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:01:52,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 22:01:52,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:52,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 22:01:52,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-24 22:01:52,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 22:01:52,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 78 flow. Second operand has 11 states, 11 states have (on average 21.363636363636363) internal successors, (235), 11 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:52,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:52,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 22:01:52,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:01:53,273 INFO L124 PetriNetUnfolderBase]: 428/787 cut-off events. [2023-11-24 22:01:53,274 INFO L125 PetriNetUnfolderBase]: For 203/206 co-relation queries the response was YES. [2023-11-24 22:01:53,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1848 conditions, 787 events. 428/787 cut-off events. For 203/206 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3563 event pairs, 64 based on Foata normal form. 3/719 useless extension candidates. Maximal degree in co-relation 1835. Up to 184 conditions per place. [2023-11-24 22:01:53,284 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 70 selfloop transitions, 16 changer transitions 13/105 dead transitions. [2023-11-24 22:01:53,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 105 transitions, 507 flow [2023-11-24 22:01:53,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 22:01:53,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 22:01:53,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2023-11-24 22:01:53,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7444444444444445 [2023-11-24 22:01:53,289 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 268 transitions. [2023-11-24 22:01:53,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 268 transitions. [2023-11-24 22:01:53,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:01:53,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 268 transitions. [2023-11-24 22:01:53,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 26.8) internal successors, (268), 10 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:53,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 36.0) internal successors, (396), 11 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:53,294 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 36.0) internal successors, (396), 11 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:53,294 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 78 flow. Second operand 10 states and 268 transitions. [2023-11-24 22:01:53,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 105 transitions, 507 flow [2023-11-24 22:01:53,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 105 transitions, 497 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:01:53,302 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 203 flow [2023-11-24 22:01:53,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=203, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-11-24 22:01:53,304 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2023-11-24 22:01:53,304 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 203 flow [2023-11-24 22:01:53,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.363636363636363) internal successors, (235), 11 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:53,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:53,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:53,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 22:01:53,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-24 22:01:53,511 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:01:53,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:53,511 INFO L85 PathProgramCache]: Analyzing trace with hash 160704036, now seen corresponding path program 2 times [2023-11-24 22:01:53,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:53,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360439808] [2023-11-24 22:01:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:53,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:53,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:53,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:53,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360439808] [2023-11-24 22:01:53,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360439808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:01:53,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743712041] [2023-11-24 22:01:53,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 22:01:53,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:01:53,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:01:53,749 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:01:53,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 22:01:53,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 22:01:53,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:01:53,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 22:01:53,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:54,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:01:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:54,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743712041] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:01:54,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:01:54,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 8] total 16 [2023-11-24 22:01:54,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510173384] [2023-11-24 22:01:54,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:01:54,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 22:01:54,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:54,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 22:01:54,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2023-11-24 22:01:54,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 22:01:54,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 203 flow. Second operand has 17 states, 17 states have (on average 19.470588235294116) internal successors, (331), 17 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:54,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:54,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 22:01:54,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:01:55,499 INFO L124 PetriNetUnfolderBase]: 581/1070 cut-off events. [2023-11-24 22:01:55,500 INFO L125 PetriNetUnfolderBase]: For 1139/1139 co-relation queries the response was YES. [2023-11-24 22:01:55,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2972 conditions, 1070 events. 581/1070 cut-off events. For 1139/1139 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5353 event pairs, 2 based on Foata normal form. 24/1014 useless extension candidates. Maximal degree in co-relation 2954. Up to 225 conditions per place. [2023-11-24 22:01:55,512 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 77 selfloop transitions, 88 changer transitions 9/180 dead transitions. [2023-11-24 22:01:55,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 180 transitions, 1263 flow [2023-11-24 22:01:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-24 22:01:55,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-24 22:01:55,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 450 transitions. [2023-11-24 22:01:55,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-24 22:01:55,515 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 450 transitions. [2023-11-24 22:01:55,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 450 transitions. [2023-11-24 22:01:55,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:01:55,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 450 transitions. [2023-11-24 22:01:55,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 22.5) internal successors, (450), 20 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:55,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 36.0) internal successors, (756), 21 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:55,521 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 36.0) internal successors, (756), 21 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:55,521 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 203 flow. Second operand 20 states and 450 transitions. [2023-11-24 22:01:55,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 180 transitions, 1263 flow [2023-11-24 22:01:55,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 180 transitions, 1228 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-11-24 22:01:55,534 INFO L231 Difference]: Finished difference. Result has 79 places, 123 transitions, 1079 flow [2023-11-24 22:01:55,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1079, PETRI_PLACES=79, PETRI_TRANSITIONS=123} [2023-11-24 22:01:55,535 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2023-11-24 22:01:55,535 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 123 transitions, 1079 flow [2023-11-24 22:01:55,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.470588235294116) internal successors, (331), 17 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:55,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:55,536 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:55,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-24 22:01:55,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:01:55,742 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:01:55,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:55,742 INFO L85 PathProgramCache]: Analyzing trace with hash 107303959, now seen corresponding path program 3 times [2023-11-24 22:01:55,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:55,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030272164] [2023-11-24 22:01:55,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:55,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:56,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:56,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030272164] [2023-11-24 22:01:56,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030272164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:01:56,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859416000] [2023-11-24 22:01:56,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 22:01:56,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:01:56,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:01:56,183 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:01:56,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 22:01:56,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 22:01:56,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:01:56,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 22:01:56,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:56,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:01:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:56,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859416000] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:01:56,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:01:56,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2023-11-24 22:01:56,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731691316] [2023-11-24 22:01:56,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:01:56,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 22:01:56,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:56,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 22:01:56,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-11-24 22:01:56,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 22:01:56,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 123 transitions, 1079 flow. Second operand has 16 states, 16 states have (on average 19.6875) internal successors, (315), 16 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:56,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:56,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 22:01:56,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:01:58,293 INFO L124 PetriNetUnfolderBase]: 1143/2036 cut-off events. [2023-11-24 22:01:58,294 INFO L125 PetriNetUnfolderBase]: For 9104/9106 co-relation queries the response was YES. [2023-11-24 22:01:58,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9032 conditions, 2036 events. 1143/2036 cut-off events. For 9104/9106 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11250 event pairs, 24 based on Foata normal form. 35/2071 useless extension candidates. Maximal degree in co-relation 8998. Up to 455 conditions per place. [2023-11-24 22:01:58,327 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 179 selfloop transitions, 220 changer transitions 26/431 dead transitions. [2023-11-24 22:01:58,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 431 transitions, 4401 flow [2023-11-24 22:01:58,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-24 22:01:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-24 22:01:58,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 671 transitions. [2023-11-24 22:01:58,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64272030651341 [2023-11-24 22:01:58,331 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 671 transitions. [2023-11-24 22:01:58,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 671 transitions. [2023-11-24 22:01:58,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:01:58,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 671 transitions. [2023-11-24 22:01:58,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 23.137931034482758) internal successors, (671), 29 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:58,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 36.0) internal successors, (1080), 30 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:58,339 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 36.0) internal successors, (1080), 30 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:58,339 INFO L175 Difference]: Start difference. First operand has 79 places, 123 transitions, 1079 flow. Second operand 29 states and 671 transitions. [2023-11-24 22:01:58,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 431 transitions, 4401 flow [2023-11-24 22:01:58,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 431 transitions, 4195 flow, removed 62 selfloop flow, removed 2 redundant places. [2023-11-24 22:01:58,431 INFO L231 Difference]: Finished difference. Result has 127 places, 319 transitions, 3652 flow [2023-11-24 22:01:58,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3652, PETRI_PLACES=127, PETRI_TRANSITIONS=319} [2023-11-24 22:01:58,433 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 89 predicate places. [2023-11-24 22:01:58,433 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 319 transitions, 3652 flow [2023-11-24 22:01:58,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.6875) internal successors, (315), 16 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:58,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:58,435 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:58,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 22:01:58,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:01:58,641 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:01:58,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:58,642 INFO L85 PathProgramCache]: Analyzing trace with hash -53391401, now seen corresponding path program 4 times [2023-11-24 22:01:58,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:58,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906860985] [2023-11-24 22:01:58,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:58,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:58,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:58,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906860985] [2023-11-24 22:01:58,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906860985] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:01:58,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382008451] [2023-11-24 22:01:58,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 22:01:58,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:01:58,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:01:58,913 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:01:58,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 22:01:59,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 22:01:59,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:01:59,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 22:01:59,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:59,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:01:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:59,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382008451] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:01:59,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:01:59,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2023-11-24 22:01:59,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306378909] [2023-11-24 22:01:59,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:01:59,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 22:01:59,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:59,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 22:01:59,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-11-24 22:01:59,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-24 22:01:59,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 319 transitions, 3652 flow. Second operand has 16 states, 16 states have (on average 20.25) internal successors, (324), 16 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) [2023-11-24 22:01:59,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:59,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-24 22:01:59,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:00,704 INFO L124 PetriNetUnfolderBase]: 1351/2407 cut-off events. [2023-11-24 22:02:00,704 INFO L125 PetriNetUnfolderBase]: For 23144/23188 co-relation queries the response was YES. [2023-11-24 22:02:00,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14127 conditions, 2407 events. 1351/2407 cut-off events. For 23144/23188 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13846 event pairs, 116 based on Foata normal form. 14/2413 useless extension candidates. Maximal degree in co-relation 14070. Up to 738 conditions per place. [2023-11-24 22:02:00,751 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 167 selfloop transitions, 271 changer transitions 10/494 dead transitions. [2023-11-24 22:02:00,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 494 transitions, 6630 flow [2023-11-24 22:02:00,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 22:02:00,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-24 22:02:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 375 transitions. [2023-11-24 22:02:00,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6510416666666666 [2023-11-24 22:02:00,754 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 375 transitions. [2023-11-24 22:02:00,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 375 transitions. [2023-11-24 22:02:00,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:00,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 375 transitions. [2023-11-24 22:02:00,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 23.4375) internal successors, (375), 16 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:00,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 36.0) internal successors, (612), 17 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:00,759 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 36.0) internal successors, (612), 17 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:00,759 INFO L175 Difference]: Start difference. First operand has 127 places, 319 transitions, 3652 flow. Second operand 16 states and 375 transitions. [2023-11-24 22:02:00,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 494 transitions, 6630 flow [2023-11-24 22:02:00,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 494 transitions, 6375 flow, removed 118 selfloop flow, removed 6 redundant places. [2023-11-24 22:02:01,011 INFO L231 Difference]: Finished difference. Result has 146 places, 438 transitions, 6139 flow [2023-11-24 22:02:01,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=3473, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6139, PETRI_PLACES=146, PETRI_TRANSITIONS=438} [2023-11-24 22:02:01,013 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 108 predicate places. [2023-11-24 22:02:01,013 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 438 transitions, 6139 flow [2023-11-24 22:02:01,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.25) internal successors, (324), 16 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) [2023-11-24 22:02:01,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:01,014 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:01,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:01,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 22:02:01,220 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:02:01,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:01,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1772542709, now seen corresponding path program 5 times [2023-11-24 22:02:01,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:01,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620965318] [2023-11-24 22:02:01,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:01,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:01,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:01,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620965318] [2023-11-24 22:02:01,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620965318] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:02:01,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374387596] [2023-11-24 22:02:01,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 22:02:01,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:01,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:01,561 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:01,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 22:02:01,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-24 22:02:01,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:02:01,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 22:02:01,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:01,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:02:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:02,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374387596] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:02:02,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:02:02,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 18 [2023-11-24 22:02:02,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957362888] [2023-11-24 22:02:02,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:02:02,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-24 22:02:02,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:02,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-24 22:02:02,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-24 22:02:02,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-24 22:02:02,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 438 transitions, 6139 flow. Second operand has 18 states, 18 states have (on average 20.22222222222222) internal successors, (364), 18 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:02,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:02,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-24 22:02:02,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:04,619 INFO L124 PetriNetUnfolderBase]: 1748/3109 cut-off events. [2023-11-24 22:02:04,619 INFO L125 PetriNetUnfolderBase]: For 45340/45420 co-relation queries the response was YES. [2023-11-24 22:02:04,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20736 conditions, 3109 events. 1748/3109 cut-off events. For 45340/45420 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 18399 event pairs, 25 based on Foata normal form. 71/3180 useless extension candidates. Maximal degree in co-relation 20672. Up to 717 conditions per place. [2023-11-24 22:02:04,714 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 139 selfloop transitions, 582 changer transitions 4/771 dead transitions. [2023-11-24 22:02:04,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 771 transitions, 11904 flow [2023-11-24 22:02:04,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-24 22:02:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-24 22:02:04,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 876 transitions. [2023-11-24 22:02:04,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6403508771929824 [2023-11-24 22:02:04,722 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 876 transitions. [2023-11-24 22:02:04,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 876 transitions. [2023-11-24 22:02:04,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:04,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 876 transitions. [2023-11-24 22:02:04,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 23.05263157894737) internal successors, (876), 38 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:04,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 36.0) internal successors, (1404), 39 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:04,736 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 36.0) internal successors, (1404), 39 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:04,736 INFO L175 Difference]: Start difference. First operand has 146 places, 438 transitions, 6139 flow. Second operand 38 states and 876 transitions. [2023-11-24 22:02:04,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 771 transitions, 11904 flow [2023-11-24 22:02:05,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 771 transitions, 11662 flow, removed 119 selfloop flow, removed 2 redundant places. [2023-11-24 22:02:05,233 INFO L231 Difference]: Finished difference. Result has 186 places, 676 transitions, 11023 flow [2023-11-24 22:02:05,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=11023, PETRI_PLACES=186, PETRI_TRANSITIONS=676} [2023-11-24 22:02:05,234 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 148 predicate places. [2023-11-24 22:02:05,235 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 676 transitions, 11023 flow [2023-11-24 22:02:05,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 20.22222222222222) internal successors, (364), 18 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:05,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:05,236 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:05,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:05,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 22:02:05,442 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:02:05,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:05,442 INFO L85 PathProgramCache]: Analyzing trace with hash 441620359, now seen corresponding path program 6 times [2023-11-24 22:02:05,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:05,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110200154] [2023-11-24 22:02:05,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:05,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:05,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110200154] [2023-11-24 22:02:05,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110200154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:02:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809657430] [2023-11-24 22:02:05,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 22:02:05,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:05,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:05,832 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:05,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 22:02:05,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-24 22:02:05,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:02:05,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 22:02:05,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:06,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:02:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:06,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809657430] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:02:06,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:02:06,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-24 22:02:06,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824090314] [2023-11-24 22:02:06,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:02:06,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 22:02:06,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:06,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 22:02:06,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2023-11-24 22:02:06,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-24 22:02:06,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 676 transitions, 11023 flow. Second operand has 19 states, 19 states have (on average 20.157894736842106) internal successors, (383), 19 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:06,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:06,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-24 22:02:06,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:09,979 INFO L124 PetriNetUnfolderBase]: 2242/4024 cut-off events. [2023-11-24 22:02:09,979 INFO L125 PetriNetUnfolderBase]: For 56694/56794 co-relation queries the response was YES. [2023-11-24 22:02:10,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29395 conditions, 4024 events. 2242/4024 cut-off events. For 56694/56794 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 25067 event pairs, 51 based on Foata normal form. 63/4087 useless extension candidates. Maximal degree in co-relation 29326. Up to 887 conditions per place. [2023-11-24 22:02:10,065 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 186 selfloop transitions, 784 changer transitions 3/1019 dead transitions. [2023-11-24 22:02:10,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 1019 transitions, 17818 flow [2023-11-24 22:02:10,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-24 22:02:10,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-24 22:02:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 1127 transitions. [2023-11-24 22:02:10,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2023-11-24 22:02:10,071 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 1127 transitions. [2023-11-24 22:02:10,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 1127 transitions. [2023-11-24 22:02:10,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:10,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 1127 transitions. [2023-11-24 22:02:10,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 23.0) internal successors, (1127), 49 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:10,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 36.0) internal successors, (1800), 50 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:10,082 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 36.0) internal successors, (1800), 50 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:10,082 INFO L175 Difference]: Start difference. First operand has 186 places, 676 transitions, 11023 flow. Second operand 49 states and 1127 transitions. [2023-11-24 22:02:10,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 1019 transitions, 17818 flow [2023-11-24 22:02:11,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 1019 transitions, 16874 flow, removed 457 selfloop flow, removed 1 redundant places. [2023-11-24 22:02:11,053 INFO L231 Difference]: Finished difference. Result has 254 places, 906 transitions, 16595 flow [2023-11-24 22:02:11,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=10330, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=563, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=16595, PETRI_PLACES=254, PETRI_TRANSITIONS=906} [2023-11-24 22:02:11,055 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 216 predicate places. [2023-11-24 22:02:11,055 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 906 transitions, 16595 flow [2023-11-24 22:02:11,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.157894736842106) internal successors, (383), 19 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:11,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:11,056 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:11,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:11,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 22:02:11,257 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:02:11,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:11,259 INFO L85 PathProgramCache]: Analyzing trace with hash 264814453, now seen corresponding path program 7 times [2023-11-24 22:02:11,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:11,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827050050] [2023-11-24 22:02:11,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:11,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:11,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:11,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827050050] [2023-11-24 22:02:11,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827050050] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:02:11,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538840740] [2023-11-24 22:02:11,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 22:02:11,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:11,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:11,640 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:11,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 22:02:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:11,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 22:02:11,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:11,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:02:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:12,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538840740] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:02:12,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:02:12,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2023-11-24 22:02:12,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028065307] [2023-11-24 22:02:12,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:02:12,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 22:02:12,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:12,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 22:02:12,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-24 22:02:12,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-24 22:02:12,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 906 transitions, 16595 flow. Second operand has 15 states, 15 states have (on average 20.333333333333332) internal successors, (305), 15 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:12,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:12,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-24 22:02:12,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:15,222 INFO L124 PetriNetUnfolderBase]: 2619/4696 cut-off events. [2023-11-24 22:02:15,223 INFO L125 PetriNetUnfolderBase]: For 57727/57785 co-relation queries the response was YES. [2023-11-24 22:02:15,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37084 conditions, 4696 events. 2619/4696 cut-off events. For 57727/57785 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 30232 event pairs, 107 based on Foata normal form. 30/4726 useless extension candidates. Maximal degree in co-relation 36995. Up to 1018 conditions per place. [2023-11-24 22:02:15,333 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 297 selfloop transitions, 764 changer transitions 1/1108 dead transitions. [2023-11-24 22:02:15,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 1108 transitions, 22089 flow [2023-11-24 22:02:15,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-24 22:02:15,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-24 22:02:15,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 496 transitions. [2023-11-24 22:02:15,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.656084656084656 [2023-11-24 22:02:15,335 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 496 transitions. [2023-11-24 22:02:15,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 496 transitions. [2023-11-24 22:02:15,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:15,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 496 transitions. [2023-11-24 22:02:15,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 23.61904761904762) internal successors, (496), 21 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:15,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 36.0) internal successors, (792), 22 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:15,341 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 36.0) internal successors, (792), 22 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:15,341 INFO L175 Difference]: Start difference. First operand has 254 places, 906 transitions, 16595 flow. Second operand 21 states and 496 transitions. [2023-11-24 22:02:15,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 1108 transitions, 22089 flow [2023-11-24 22:02:16,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 1108 transitions, 21595 flow, removed 113 selfloop flow, removed 12 redundant places. [2023-11-24 22:02:16,433 INFO L231 Difference]: Finished difference. Result has 270 places, 1051 transitions, 21642 flow [2023-11-24 22:02:16,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=16091, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=21642, PETRI_PLACES=270, PETRI_TRANSITIONS=1051} [2023-11-24 22:02:16,435 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 232 predicate places. [2023-11-24 22:02:16,435 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 1051 transitions, 21642 flow [2023-11-24 22:02:16,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.333333333333332) internal successors, (305), 15 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:16,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:16,436 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:16,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-24 22:02:16,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 22:02:16,637 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:02:16,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:16,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1301747213, now seen corresponding path program 8 times [2023-11-24 22:02:16,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:16,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379398857] [2023-11-24 22:02:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:16,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:16,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:16,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379398857] [2023-11-24 22:02:16,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379398857] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:02:16,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695038829] [2023-11-24 22:02:16,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 22:02:16,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:16,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:16,999 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:17,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 22:02:17,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 22:02:17,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:02:17,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 22:02:17,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:17,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:02:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:17,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695038829] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:02:17,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:02:17,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-24 22:02:17,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121797864] [2023-11-24 22:02:17,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:02:17,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 22:02:17,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:17,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 22:02:17,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2023-11-24 22:02:17,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-24 22:02:17,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 1051 transitions, 21642 flow. Second operand has 17 states, 17 states have (on average 20.176470588235293) internal successors, (343), 17 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:17,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:17,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-24 22:02:17,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:21,162 INFO L124 PetriNetUnfolderBase]: 3058/5466 cut-off events. [2023-11-24 22:02:21,162 INFO L125 PetriNetUnfolderBase]: For 90943/90980 co-relation queries the response was YES. [2023-11-24 22:02:21,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47931 conditions, 5466 events. 3058/5466 cut-off events. For 90943/90980 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 36301 event pairs, 118 based on Foata normal form. 61/5527 useless extension candidates. Maximal degree in co-relation 47832. Up to 1144 conditions per place. [2023-11-24 22:02:21,283 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 303 selfloop transitions, 991 changer transitions 4/1344 dead transitions. [2023-11-24 22:02:21,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 1344 transitions, 29806 flow [2023-11-24 22:02:21,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 22:02:21,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-24 22:02:21,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 552 transitions. [2023-11-24 22:02:21,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-24 22:02:21,286 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 552 transitions. [2023-11-24 22:02:21,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 552 transitions. [2023-11-24 22:02:21,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:21,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 552 transitions. [2023-11-24 22:02:21,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 24.0) internal successors, (552), 23 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:21,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 36.0) internal successors, (864), 24 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:21,292 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 36.0) internal successors, (864), 24 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:21,292 INFO L175 Difference]: Start difference. First operand has 270 places, 1051 transitions, 21642 flow. Second operand 23 states and 552 transitions. [2023-11-24 22:02:21,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 1344 transitions, 29806 flow [2023-11-24 22:02:23,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 1344 transitions, 29695 flow, removed 30 selfloop flow, removed 3 redundant places. [2023-11-24 22:02:23,331 INFO L231 Difference]: Finished difference. Result has 301 places, 1259 transitions, 30116 flow [2023-11-24 22:02:23,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=21523, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1050, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=30116, PETRI_PLACES=301, PETRI_TRANSITIONS=1259} [2023-11-24 22:02:23,333 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 263 predicate places. [2023-11-24 22:02:23,333 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 1259 transitions, 30116 flow [2023-11-24 22:02:23,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 20.176470588235293) internal successors, (343), 17 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:23,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:23,334 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:23,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:23,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 22:02:23,535 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:02:23,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:23,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1165277647, now seen corresponding path program 9 times [2023-11-24 22:02:23,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:23,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590092988] [2023-11-24 22:02:23,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:23,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:23,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:23,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590092988] [2023-11-24 22:02:23,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590092988] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:02:23,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227924673] [2023-11-24 22:02:23,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 22:02:23,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:23,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:23,787 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:23,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 22:02:23,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-24 22:02:23,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:02:23,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 22:02:23,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:24,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:02:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:24,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227924673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:02:24,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:02:24,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2023-11-24 22:02:24,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661586857] [2023-11-24 22:02:24,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:02:24,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 22:02:24,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:24,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 22:02:24,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-24 22:02:24,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-24 22:02:24,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 1259 transitions, 30116 flow. Second operand has 17 states, 17 states have (on average 19.941176470588236) internal successors, (339), 17 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:24,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:24,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-24 22:02:24,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:29,001 INFO L124 PetriNetUnfolderBase]: 3353/5999 cut-off events. [2023-11-24 22:02:29,001 INFO L125 PetriNetUnfolderBase]: For 133963/134022 co-relation queries the response was YES. [2023-11-24 22:02:29,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59402 conditions, 5999 events. 3353/5999 cut-off events. For 133963/134022 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 40673 event pairs, 168 based on Foata normal form. 68/6067 useless extension candidates. Maximal degree in co-relation 59291. Up to 1187 conditions per place. [2023-11-24 22:02:29,188 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 295 selfloop transitions, 1156 changer transitions 3/1500 dead transitions. [2023-11-24 22:02:29,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 1500 transitions, 38028 flow [2023-11-24 22:02:29,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-24 22:02:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-24 22:02:29,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 654 transitions. [2023-11-24 22:02:29,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6488095238095238 [2023-11-24 22:02:29,192 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 654 transitions. [2023-11-24 22:02:29,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 654 transitions. [2023-11-24 22:02:29,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:29,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 654 transitions. [2023-11-24 22:02:29,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 23.357142857142858) internal successors, (654), 28 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:29,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 36.0) internal successors, (1044), 29 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:29,200 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 36.0) internal successors, (1044), 29 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:29,200 INFO L175 Difference]: Start difference. First operand has 301 places, 1259 transitions, 30116 flow. Second operand 28 states and 654 transitions. [2023-11-24 22:02:29,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 1500 transitions, 38028 flow [2023-11-24 22:02:32,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1500 transitions, 37732 flow, removed 101 selfloop flow, removed 6 redundant places. [2023-11-24 22:02:32,201 INFO L231 Difference]: Finished difference. Result has 333 places, 1434 transitions, 38664 flow [2023-11-24 22:02:32,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=29765, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=999, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=38664, PETRI_PLACES=333, PETRI_TRANSITIONS=1434} [2023-11-24 22:02:32,203 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 295 predicate places. [2023-11-24 22:02:32,203 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 1434 transitions, 38664 flow [2023-11-24 22:02:32,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.941176470588236) internal successors, (339), 17 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:32,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:32,204 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:32,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:32,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:32,410 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:02:32,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:32,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1768793685, now seen corresponding path program 10 times [2023-11-24 22:02:32,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:32,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598521273] [2023-11-24 22:02:32,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:32,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:32,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:32,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598521273] [2023-11-24 22:02:32,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598521273] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:02:32,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506449994] [2023-11-24 22:02:32,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 22:02:32,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:32,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:32,723 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:32,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805f1d63-36a6-4c98-8fb8-3b1bcd0d48fe/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 22:02:32,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 22:02:32,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:02:32,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 22:02:32,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:33,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:02:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:33,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506449994] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:02:33,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:02:33,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 19 [2023-11-24 22:02:33,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570667804] [2023-11-24 22:02:33,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:02:33,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 22:02:33,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:33,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 22:02:33,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-11-24 22:02:33,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 22:02:33,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 1434 transitions, 38664 flow. Second operand has 19 states, 19 states have (on average 19.842105263157894) internal successors, (377), 19 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:33,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:33,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 22:02:33,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand