./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/stack_longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/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_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack_longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/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_05e1b21e-6546-4ce6-bbe9-177613d1db2f/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 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:06:13,694 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:06:13,798 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 22:06:13,808 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:06:13,812 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:06:13,845 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:06:13,846 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:06:13,846 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:06:13,847 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:06:13,848 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:06:13,848 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:06:13,849 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:06:13,850 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:06:13,851 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:06:13,851 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:06:13,852 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:06:13,853 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:06:13,853 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:06:13,854 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:06:13,854 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:06:13,855 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 22:06:13,859 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 22:06:13,859 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 22:06:13,860 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:06:13,860 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 22:06:13,861 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 22:06:13,861 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:06:13,861 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:06:13,862 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:06:13,863 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:06:13,864 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:06:13,865 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:06:13,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:06:13,865 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:06:13,865 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:06:13,866 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:06:13,866 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:06:13,866 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:06:13,866 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:06:13,867 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:06:13,867 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:06:13,867 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_05e1b21e-6546-4ce6-bbe9-177613d1db2f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 [2023-11-24 22:06:14,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:06:14,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:06:14,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:06:14,165 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:06:14,166 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:06:14,168 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread/stack_longest-1.i [2023-11-24 22:06:17,297 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:06:17,669 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:06:17,670 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/sv-benchmarks/c/pthread/stack_longest-1.i [2023-11-24 22:06:17,709 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/data/cde37da16/4438a88d0c3b41d5bb0b4a143b16a49b/FLAG05499d223 [2023-11-24 22:06:17,725 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/data/cde37da16/4438a88d0c3b41d5bb0b4a143b16a49b [2023-11-24 22:06:17,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:06:17,730 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:06:17,731 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:06:17,731 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:06:17,737 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:06:17,738 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:06:17" (1/1) ... [2023-11-24 22:06:17,739 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@418aed5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:17, skipping insertion in model container [2023-11-24 22:06:17,739 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:06:17" (1/1) ... [2023-11-24 22:06:17,793 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:06:18,388 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:06:18,400 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:06:18,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:06:18,531 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:06:18,531 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:18 WrapperNode [2023-11-24 22:06:18,531 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:06:18,533 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:06:18,533 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:06:18,533 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:06:18,541 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:18" (1/1) ... [2023-11-24 22:06:18,579 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:18" (1/1) ... [2023-11-24 22:06:18,622 INFO L138 Inliner]: procedures = 278, calls = 42, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 167 [2023-11-24 22:06:18,623 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:06:18,625 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:06:18,626 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:06:18,626 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:06:18,642 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:18" (1/1) ... [2023-11-24 22:06:18,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:18" (1/1) ... [2023-11-24 22:06:18,653 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:18" (1/1) ... [2023-11-24 22:06:18,670 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 5, 2, 2, 3]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0, 0]. The 4 writes are split as follows [0, 0, 1, 1, 2]. [2023-11-24 22:06:18,671 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:18" (1/1) ... [2023-11-24 22:06:18,671 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:18" (1/1) ... [2023-11-24 22:06:18,682 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:18" (1/1) ... [2023-11-24 22:06:18,686 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:18" (1/1) ... [2023-11-24 22:06:18,689 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:18" (1/1) ... [2023-11-24 22:06:18,692 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:18" (1/1) ... [2023-11-24 22:06:18,697 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:06:18,698 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:06:18,698 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:06:18,698 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:06:18,699 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:18" (1/1) ... [2023-11-24 22:06:18,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:06:18,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:06:18,755 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:06:18,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:06:18,797 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-24 22:06:18,797 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-24 22:06:18,798 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-24 22:06:18,798 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-24 22:06:18,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:06:18,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:06:18,798 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 22:06:18,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 22:06:18,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 22:06:18,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 22:06:18,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 22:06:18,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 22:06:18,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 22:06:18,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 22:06:18,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 22:06:18,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 22:06:18,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 22:06:18,800 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 22:06:18,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:06:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:06:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 22:06:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 22:06:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 22:06:18,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 22:06:18,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:06:18,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:06:18,804 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 22:06:18,987 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:06:18,989 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:06:19,356 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:06:19,664 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:06:19,664 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 22:06:19,665 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:06:19 BoogieIcfgContainer [2023-11-24 22:06:19,665 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:06:19,668 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:06:19,668 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:06:19,671 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:06:19,671 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:06:17" (1/3) ... [2023-11-24 22:06:19,672 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eaa75e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:06:19, skipping insertion in model container [2023-11-24 22:06:19,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:18" (2/3) ... [2023-11-24 22:06:19,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eaa75e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:06:19, skipping insertion in model container [2023-11-24 22:06:19,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:06:19" (3/3) ... [2023-11-24 22:06:19,674 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2023-11-24 22:06:19,694 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:06:19,695 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-11-24 22:06:19,695 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 22:06:19,803 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 22:06:19,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 68 transitions, 150 flow [2023-11-24 22:06:19,906 INFO L124 PetriNetUnfolderBase]: 9/66 cut-off events. [2023-11-24 22:06:19,907 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 22:06:19,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 66 events. 9/66 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 177 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 54. Up to 3 conditions per place. [2023-11-24 22:06:19,911 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 68 transitions, 150 flow [2023-11-24 22:06:19,919 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 65 transitions, 142 flow [2023-11-24 22:06:19,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:06:19,947 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;@7040bf91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:06:19,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-11-24 22:06:19,951 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:06:19,952 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 22:06:19,952 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:06:19,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:19,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 22:06:19,953 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:19,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:19,959 INFO L85 PathProgramCache]: Analyzing trace with hash 14666, now seen corresponding path program 1 times [2023-11-24 22:06:19,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:19,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480560226] [2023-11-24 22:06:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:19,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:20,401 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 22:06:20,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:20,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480560226] [2023-11-24 22:06:20,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480560226] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:20,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:20,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:20,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445915558] [2023-11-24 22:06:20,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:20,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:20,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:20,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:20,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:20,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 68 [2023-11-24 22:06:20,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 22:06:20,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:20,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 68 [2023-11-24 22:06:20,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:20,946 INFO L124 PetriNetUnfolderBase]: 731/1422 cut-off events. [2023-11-24 22:06:20,947 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-11-24 22:06:20,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2588 conditions, 1422 events. 731/1422 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8199 event pairs, 559 based on Foata normal form. 138/1328 useless extension candidates. Maximal degree in co-relation 2482. Up to 1125 conditions per place. [2023-11-24 22:06:20,970 INFO L140 encePairwiseOnDemand]: 60/68 looper letters, 32 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-11-24 22:06:20,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 57 transitions, 194 flow [2023-11-24 22:06:20,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:20,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:20,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-24 22:06:20,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637254901960784 [2023-11-24 22:06:20,987 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-24 22:06:20,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-24 22:06:20,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:20,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-24 22:06:20,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 22:06:21,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:21,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:21,003 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 142 flow. Second operand 3 states and 115 transitions. [2023-11-24 22:06:21,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 57 transitions, 194 flow [2023-11-24 22:06:21,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 186 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 22:06:21,016 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 122 flow [2023-11-24 22:06:21,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2023-11-24 22:06:21,023 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -6 predicate places. [2023-11-24 22:06:21,024 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 122 flow [2023-11-24 22:06:21,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 22:06:21,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:21,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 22:06:21,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:06:21,025 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:21,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:21,026 INFO L85 PathProgramCache]: Analyzing trace with hash 14667, now seen corresponding path program 1 times [2023-11-24 22:06:21,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:21,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397901699] [2023-11-24 22:06:21,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:21,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:21,235 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 22:06:21,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:21,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397901699] [2023-11-24 22:06:21,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397901699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:21,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:21,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:21,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698662415] [2023-11-24 22:06:21,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:21,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:21,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:21,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:21,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:21,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 68 [2023-11-24 22:06:21,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 122 flow. Second operand has 3 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 22:06:21,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:21,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 68 [2023-11-24 22:06:21,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:21,484 INFO L124 PetriNetUnfolderBase]: 456/959 cut-off events. [2023-11-24 22:06:21,484 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2023-11-24 22:06:21,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 959 events. 456/959 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5412 event pairs, 339 based on Foata normal form. 122/910 useless extension candidates. Maximal degree in co-relation 1695. Up to 728 conditions per place. [2023-11-24 22:06:21,494 INFO L140 encePairwiseOnDemand]: 64/68 looper letters, 30 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-11-24 22:06:21,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 55 transitions, 182 flow [2023-11-24 22:06:21,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:21,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:21,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-24 22:06:21,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637254901960784 [2023-11-24 22:06:21,500 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-24 22:06:21,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-24 22:06:21,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:21,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-24 22:06:21,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 22:06:21,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:21,510 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:21,511 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 122 flow. Second operand 3 states and 115 transitions. [2023-11-24 22:06:21,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 55 transitions, 182 flow [2023-11-24 22:06:21,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 55 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:21,514 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 118 flow [2023-11-24 22:06:21,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2023-11-24 22:06:21,515 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -8 predicate places. [2023-11-24 22:06:21,515 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 118 flow [2023-11-24 22:06:21,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 22:06:21,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:21,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:06:21,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:06:21,516 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:21,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:21,516 INFO L85 PathProgramCache]: Analyzing trace with hash 437385383, now seen corresponding path program 1 times [2023-11-24 22:06:21,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:21,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510762975] [2023-11-24 22:06:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:21,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:21,589 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 22:06:21,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:21,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510762975] [2023-11-24 22:06:21,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510762975] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:21,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:21,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:21,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515782218] [2023-11-24 22:06:21,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:21,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:21,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:21,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:21,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:21,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 68 [2023-11-24 22:06:21,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:21,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:21,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 68 [2023-11-24 22:06:21,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:21,777 INFO L124 PetriNetUnfolderBase]: 481/999 cut-off events. [2023-11-24 22:06:21,778 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-24 22:06:21,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1792 conditions, 999 events. 481/999 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5593 event pairs, 359 based on Foata normal form. 0/838 useless extension candidates. Maximal degree in co-relation 1782. Up to 775 conditions per place. [2023-11-24 22:06:21,787 INFO L140 encePairwiseOnDemand]: 64/68 looper letters, 32 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-11-24 22:06:21,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 53 transitions, 182 flow [2023-11-24 22:06:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:21,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:21,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2023-11-24 22:06:21,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441176470588235 [2023-11-24 22:06:21,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2023-11-24 22:06:21,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2023-11-24 22:06:21,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:21,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2023-11-24 22:06:21,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 22:06:21,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:21,793 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:21,793 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 118 flow. Second operand 3 states and 111 transitions. [2023-11-24 22:06:21,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 53 transitions, 182 flow [2023-11-24 22:06:21,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:21,796 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 114 flow [2023-11-24 22:06:21,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2023-11-24 22:06:21,797 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -10 predicate places. [2023-11-24 22:06:21,797 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 114 flow [2023-11-24 22:06:21,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:21,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:21,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:06:21,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:06:21,799 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:21,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:21,799 INFO L85 PathProgramCache]: Analyzing trace with hash 437385384, now seen corresponding path program 1 times [2023-11-24 22:06:21,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:21,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561129554] [2023-11-24 22:06:21,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:21,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:21,878 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 22:06:21,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:21,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561129554] [2023-11-24 22:06:21,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561129554] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:21,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:21,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:21,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349614454] [2023-11-24 22:06:21,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:21,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:21,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:21,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:21,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:21,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 68 [2023-11-24 22:06:21,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 22:06:21,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:21,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 68 [2023-11-24 22:06:21,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:22,058 INFO L124 PetriNetUnfolderBase]: 456/943 cut-off events. [2023-11-24 22:06:22,059 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2023-11-24 22:06:22,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1689 conditions, 943 events. 456/943 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5239 event pairs, 339 based on Foata normal form. 21/809 useless extension candidates. Maximal degree in co-relation 1679. Up to 728 conditions per place. [2023-11-24 22:06:22,067 INFO L140 encePairwiseOnDemand]: 64/68 looper letters, 30 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-11-24 22:06:22,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 174 flow [2023-11-24 22:06:22,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:22,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-24 22:06:22,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637254901960784 [2023-11-24 22:06:22,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-24 22:06:22,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-24 22:06:22,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:22,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-24 22:06:22,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 22:06:22,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:22,073 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:22,073 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 114 flow. Second operand 3 states and 115 transitions. [2023-11-24 22:06:22,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 174 flow [2023-11-24 22:06:22,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:22,075 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 110 flow [2023-11-24 22:06:22,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2023-11-24 22:06:22,077 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -12 predicate places. [2023-11-24 22:06:22,077 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 110 flow [2023-11-24 22:06:22,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 22:06:22,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:22,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:22,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 22:06:22,078 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:22,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:22,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1289927306, now seen corresponding path program 1 times [2023-11-24 22:06:22,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:22,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158250393] [2023-11-24 22:06:22,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:22,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:22,393 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 22:06:22,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:22,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158250393] [2023-11-24 22:06:22,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158250393] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:22,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:22,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:06:22,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266252300] [2023-11-24 22:06:22,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:22,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:06:22,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:22,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:06:22,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:06:22,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 68 [2023-11-24 22:06:22,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 22:06:22,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:22,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 68 [2023-11-24 22:06:22,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:22,786 INFO L124 PetriNetUnfolderBase]: 731/1352 cut-off events. [2023-11-24 22:06:22,786 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-24 22:06:22,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2495 conditions, 1352 events. 731/1352 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7534 event pairs, 399 based on Foata normal form. 0/1159 useless extension candidates. Maximal degree in co-relation 2485. Up to 797 conditions per place. [2023-11-24 22:06:22,797 INFO L140 encePairwiseOnDemand]: 63/68 looper letters, 46 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2023-11-24 22:06:22,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 66 transitions, 241 flow [2023-11-24 22:06:22,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:06:22,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:06:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2023-11-24 22:06:22,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698529411764706 [2023-11-24 22:06:22,799 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 155 transitions. [2023-11-24 22:06:22,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 155 transitions. [2023-11-24 22:06:22,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:22,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 155 transitions. [2023-11-24 22:06:22,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 22:06:22,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:22,804 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:22,804 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 110 flow. Second operand 4 states and 155 transitions. [2023-11-24 22:06:22,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 66 transitions, 241 flow [2023-11-24 22:06:22,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 66 transitions, 237 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:22,808 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 112 flow [2023-11-24 22:06:22,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-11-24 22:06:22,810 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -12 predicate places. [2023-11-24 22:06:22,810 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 112 flow [2023-11-24 22:06:22,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 22:06:22,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:22,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:22,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 22:06:22,811 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:22,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:22,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1289927305, now seen corresponding path program 1 times [2023-11-24 22:06:22,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:22,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946373239] [2023-11-24 22:06:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:22,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:23,165 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 22:06:23,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:23,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946373239] [2023-11-24 22:06:23,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946373239] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:23,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:23,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:06:23,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735166751] [2023-11-24 22:06:23,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:23,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:06:23,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:23,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:06:23,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:06:23,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-24 22:06:23,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 112 flow. Second operand has 6 states, 6 states have (on average 29.333333333333332) internal successors, (176), 6 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 22:06:23,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:23,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-24 22:06:23,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:23,787 INFO L124 PetriNetUnfolderBase]: 755/1431 cut-off events. [2023-11-24 22:06:23,788 INFO L125 PetriNetUnfolderBase]: For 51/52 co-relation queries the response was YES. [2023-11-24 22:06:23,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2733 conditions, 1431 events. 755/1431 cut-off events. For 51/52 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8055 event pairs, 125 based on Foata normal form. 0/1250 useless extension candidates. Maximal degree in co-relation 842. Up to 849 conditions per place. [2023-11-24 22:06:23,802 INFO L140 encePairwiseOnDemand]: 60/68 looper letters, 88 selfloop transitions, 9 changer transitions 0/114 dead transitions. [2023-11-24 22:06:23,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 114 transitions, 443 flow [2023-11-24 22:06:23,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 22:06:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-24 22:06:23,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 296 transitions. [2023-11-24 22:06:23,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6218487394957983 [2023-11-24 22:06:23,804 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 296 transitions. [2023-11-24 22:06:23,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 296 transitions. [2023-11-24 22:06:23,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:23,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 296 transitions. [2023-11-24 22:06:23,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 42.285714285714285) internal successors, (296), 7 states have internal predecessors, (296), 0 states have call successors, (0), 0 states 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 22:06:23,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:23,810 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:23,811 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 112 flow. Second operand 7 states and 296 transitions. [2023-11-24 22:06:23,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 114 transitions, 443 flow [2023-11-24 22:06:23,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 114 transitions, 431 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 22:06:23,817 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 170 flow [2023-11-24 22:06:23,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=170, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2023-11-24 22:06:23,821 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -5 predicate places. [2023-11-24 22:06:23,821 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 170 flow [2023-11-24 22:06:23,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.333333333333332) internal successors, (176), 6 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 22:06:23,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:23,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:23,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 22:06:23,822 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:23,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:23,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1335161988, now seen corresponding path program 1 times [2023-11-24 22:06:23,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:23,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809452042] [2023-11-24 22:06:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:23,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:23,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:23,922 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 22:06:23,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:23,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809452042] [2023-11-24 22:06:23,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809452042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:23,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:23,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:06:23,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827481649] [2023-11-24 22:06:23,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:23,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:06:23,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:23,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:06:23,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:06:23,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-24 22:06:23,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 22:06:23,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:23,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-24 22:06:23,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:24,302 INFO L124 PetriNetUnfolderBase]: 1000/1964 cut-off events. [2023-11-24 22:06:24,302 INFO L125 PetriNetUnfolderBase]: For 255/256 co-relation queries the response was YES. [2023-11-24 22:06:24,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4005 conditions, 1964 events. 1000/1964 cut-off events. For 255/256 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11788 event pairs, 505 based on Foata normal form. 0/1816 useless extension candidates. Maximal degree in co-relation 3758. Up to 1095 conditions per place. [2023-11-24 22:06:24,320 INFO L140 encePairwiseOnDemand]: 63/68 looper letters, 75 selfloop transitions, 6 changer transitions 0/99 dead transitions. [2023-11-24 22:06:24,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 99 transitions, 424 flow [2023-11-24 22:06:24,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:06:24,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:06:24,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 189 transitions. [2023-11-24 22:06:24,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6948529411764706 [2023-11-24 22:06:24,322 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 189 transitions. [2023-11-24 22:06:24,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 189 transitions. [2023-11-24 22:06:24,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:24,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 189 transitions. [2023-11-24 22:06:24,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 22:06:24,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:24,324 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:24,325 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 170 flow. Second operand 4 states and 189 transitions. [2023-11-24 22:06:24,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 99 transitions, 424 flow [2023-11-24 22:06:24,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 424 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 22:06:24,330 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 206 flow [2023-11-24 22:06:24,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2023-11-24 22:06:24,331 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2023-11-24 22:06:24,331 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 206 flow [2023-11-24 22:06:24,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 22:06:24,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:24,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:24,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 22:06:24,332 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:24,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:24,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1049455625, now seen corresponding path program 1 times [2023-11-24 22:06:24,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:24,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133217411] [2023-11-24 22:06:24,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:24,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:24,399 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 22:06:24,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:24,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133217411] [2023-11-24 22:06:24,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133217411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:24,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:24,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:06:24,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751645427] [2023-11-24 22:06:24,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:24,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:06:24,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:24,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:06:24,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:06:24,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-24 22:06:24,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:24,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:24,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-24 22:06:24,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:24,779 INFO L124 PetriNetUnfolderBase]: 974/1922 cut-off events. [2023-11-24 22:06:24,780 INFO L125 PetriNetUnfolderBase]: For 450/451 co-relation queries the response was YES. [2023-11-24 22:06:24,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4199 conditions, 1922 events. 974/1922 cut-off events. For 450/451 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 10668 event pairs, 209 based on Foata normal form. 49/1832 useless extension candidates. Maximal degree in co-relation 4111. Up to 1204 conditions per place. [2023-11-24 22:06:24,798 INFO L140 encePairwiseOnDemand]: 63/68 looper letters, 75 selfloop transitions, 6 changer transitions 0/99 dead transitions. [2023-11-24 22:06:24,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 99 transitions, 475 flow [2023-11-24 22:06:24,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:06:24,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 22:06:24,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 222 transitions. [2023-11-24 22:06:24,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6529411764705882 [2023-11-24 22:06:24,800 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 222 transitions. [2023-11-24 22:06:24,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 222 transitions. [2023-11-24 22:06:24,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:24,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 222 transitions. [2023-11-24 22:06:24,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 22:06:24,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 22:06:24,803 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 22:06:24,803 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 206 flow. Second operand 5 states and 222 transitions. [2023-11-24 22:06:24,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 99 transitions, 475 flow [2023-11-24 22:06:24,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 99 transitions, 467 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:24,811 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 210 flow [2023-11-24 22:06:24,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-11-24 22:06:24,812 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-11-24 22:06:24,812 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 210 flow [2023-11-24 22:06:24,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:24,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:24,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:24,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 22:06:24,813 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:24,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:24,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1266066275, now seen corresponding path program 1 times [2023-11-24 22:06:24,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:24,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730533379] [2023-11-24 22:06:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:24,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:24,885 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 22:06:24,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:24,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730533379] [2023-11-24 22:06:24,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730533379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:24,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:24,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:06:24,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090011382] [2023-11-24 22:06:24,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:24,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:24,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:24,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:24,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:24,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-24 22:06:24,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:24,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:24,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-24 22:06:24,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:25,219 INFO L124 PetriNetUnfolderBase]: 950/1831 cut-off events. [2023-11-24 22:06:25,219 INFO L125 PetriNetUnfolderBase]: For 487/488 co-relation queries the response was YES. [2023-11-24 22:06:25,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4113 conditions, 1831 events. 950/1831 cut-off events. For 487/488 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 10045 event pairs, 356 based on Foata normal form. 13/1712 useless extension candidates. Maximal degree in co-relation 3652. Up to 1286 conditions per place. [2023-11-24 22:06:25,235 INFO L140 encePairwiseOnDemand]: 65/68 looper letters, 53 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-11-24 22:06:25,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 72 transitions, 336 flow [2023-11-24 22:06:25,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:25,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:25,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2023-11-24 22:06:25,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6715686274509803 [2023-11-24 22:06:25,237 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 137 transitions. [2023-11-24 22:06:25,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 137 transitions. [2023-11-24 22:06:25,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:25,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 137 transitions. [2023-11-24 22:06:25,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 22:06:25,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:25,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:25,239 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 210 flow. Second operand 3 states and 137 transitions. [2023-11-24 22:06:25,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 72 transitions, 336 flow [2023-11-24 22:06:25,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 72 transitions, 328 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-24 22:06:25,244 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 189 flow [2023-11-24 22:06:25,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-11-24 22:06:25,245 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2023-11-24 22:06:25,245 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 189 flow [2023-11-24 22:06:25,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:25,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:25,246 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 22:06:25,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 22:06:25,246 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:25,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:25,247 INFO L85 PathProgramCache]: Analyzing trace with hash 311926622, now seen corresponding path program 1 times [2023-11-24 22:06:25,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:25,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362756931] [2023-11-24 22:06:25,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:25,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:25,294 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 22:06:25,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:25,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362756931] [2023-11-24 22:06:25,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362756931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:25,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:25,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:06:25,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905835867] [2023-11-24 22:06:25,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:25,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:25,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:25,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:25,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:25,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-24 22:06:25,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:25,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:25,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-24 22:06:25,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:25,602 INFO L124 PetriNetUnfolderBase]: 910/1803 cut-off events. [2023-11-24 22:06:25,602 INFO L125 PetriNetUnfolderBase]: For 470/470 co-relation queries the response was YES. [2023-11-24 22:06:25,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4016 conditions, 1803 events. 910/1803 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10350 event pairs, 672 based on Foata normal form. 12/1671 useless extension candidates. Maximal degree in co-relation 2895. Up to 1188 conditions per place. [2023-11-24 22:06:25,621 INFO L140 encePairwiseOnDemand]: 65/68 looper letters, 56 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-11-24 22:06:25,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 355 flow [2023-11-24 22:06:25,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:25,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2023-11-24 22:06:25,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7009803921568627 [2023-11-24 22:06:25,623 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 143 transitions. [2023-11-24 22:06:25,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 143 transitions. [2023-11-24 22:06:25,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:25,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 143 transitions. [2023-11-24 22:06:25,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 22:06:25,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:25,625 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:25,626 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 189 flow. Second operand 3 states and 143 transitions. [2023-11-24 22:06:25,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 355 flow [2023-11-24 22:06:25,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 77 transitions, 345 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:25,631 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 188 flow [2023-11-24 22:06:25,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-11-24 22:06:25,632 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2023-11-24 22:06:25,633 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 188 flow [2023-11-24 22:06:25,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:25,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:25,633 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:25,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 22:06:25,633 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:25,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:25,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1388251537, now seen corresponding path program 1 times [2023-11-24 22:06:25,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:25,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848395470] [2023-11-24 22:06:25,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:25,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:26,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:26,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848395470] [2023-11-24 22:06:26,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848395470] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:06:26,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713831997] [2023-11-24 22:06:26,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:26,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:06:26,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:06:26,128 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:06:26,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 22:06:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:26,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-24 22:06:26,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:06:26,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:06:26,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 22:06:26,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:06:26,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:06:26,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-24 22:06:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:26,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:06:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:26,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713831997] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:06:26,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:06:26,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2023-11-24 22:06:26,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289822655] [2023-11-24 22:06:26,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:06:26,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 22:06:26,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:26,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 22:06:26,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-24 22:06:27,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-24 22:06:27,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 188 flow. Second operand has 16 states, 16 states have (on average 30.875) internal successors, (494), 16 states have internal predecessors, (494), 0 states have call successors, (0), 0 states 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 22:06:27,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:27,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-24 22:06:27,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:30,280 INFO L124 PetriNetUnfolderBase]: 4138/7884 cut-off events. [2023-11-24 22:06:30,280 INFO L125 PetriNetUnfolderBase]: For 2319/2319 co-relation queries the response was YES. [2023-11-24 22:06:30,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17985 conditions, 7884 events. 4138/7884 cut-off events. For 2319/2319 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 53123 event pairs, 225 based on Foata normal form. 192/7553 useless extension candidates. Maximal degree in co-relation 7276. Up to 1425 conditions per place. [2023-11-24 22:06:30,354 INFO L140 encePairwiseOnDemand]: 60/68 looper letters, 349 selfloop transitions, 45 changer transitions 0/412 dead transitions. [2023-11-24 22:06:30,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 412 transitions, 1963 flow [2023-11-24 22:06:30,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 22:06:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-24 22:06:30,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1034 transitions. [2023-11-24 22:06:30,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6611253196930946 [2023-11-24 22:06:30,360 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1034 transitions. [2023-11-24 22:06:30,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1034 transitions. [2023-11-24 22:06:30,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:30,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1034 transitions. [2023-11-24 22:06:30,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 44.95652173913044) internal successors, (1034), 23 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states 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 22:06:30,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 68.0) internal successors, (1632), 24 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 22:06:30,371 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 68.0) internal successors, (1632), 24 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 22:06:30,371 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 188 flow. Second operand 23 states and 1034 transitions. [2023-11-24 22:06:30,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 412 transitions, 1963 flow [2023-11-24 22:06:30,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 412 transitions, 1946 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-24 22:06:30,387 INFO L231 Difference]: Finished difference. Result has 100 places, 103 transitions, 598 flow [2023-11-24 22:06:30,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=598, PETRI_PLACES=100, PETRI_TRANSITIONS=103} [2023-11-24 22:06:30,388 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 37 predicate places. [2023-11-24 22:06:30,388 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 103 transitions, 598 flow [2023-11-24 22:06:30,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 30.875) internal successors, (494), 16 states have internal predecessors, (494), 0 states have call successors, (0), 0 states 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 22:06:30,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:30,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:30,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 22:06:30,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 22:06:30,606 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:30,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:30,606 INFO L85 PathProgramCache]: Analyzing trace with hash 189975739, now seen corresponding path program 1 times [2023-11-24 22:06:30,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:30,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243320964] [2023-11-24 22:06:30,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:30,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:30,752 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 22:06:30,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:30,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243320964] [2023-11-24 22:06:30,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243320964] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:30,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:30,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:06:30,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271765470] [2023-11-24 22:06:30,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:30,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:30,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:30,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:30,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:30,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-24 22:06:30,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 103 transitions, 598 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 22:06:30,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:30,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-24 22:06:30,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:31,499 INFO L124 PetriNetUnfolderBase]: 1833/3912 cut-off events. [2023-11-24 22:06:31,500 INFO L125 PetriNetUnfolderBase]: For 2248/2248 co-relation queries the response was YES. [2023-11-24 22:06:31,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9453 conditions, 3912 events. 1833/3912 cut-off events. For 2248/2248 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 23884 event pairs, 372 based on Foata normal form. 234/3987 useless extension candidates. Maximal degree in co-relation 9251. Up to 2311 conditions per place. [2023-11-24 22:06:31,548 INFO L140 encePairwiseOnDemand]: 64/68 looper letters, 71 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2023-11-24 22:06:31,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 94 transitions, 617 flow [2023-11-24 22:06:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:31,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:31,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2023-11-24 22:06:31,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421568627450981 [2023-11-24 22:06:31,550 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 131 transitions. [2023-11-24 22:06:31,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 131 transitions. [2023-11-24 22:06:31,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:31,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 131 transitions. [2023-11-24 22:06:31,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 22:06:31,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:31,552 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:31,552 INFO L175 Difference]: Start difference. First operand has 100 places, 103 transitions, 598 flow. Second operand 3 states and 131 transitions. [2023-11-24 22:06:31,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 94 transitions, 617 flow [2023-11-24 22:06:31,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 94 transitions, 561 flow, removed 24 selfloop flow, removed 9 redundant places. [2023-11-24 22:06:31,570 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 387 flow [2023-11-24 22:06:31,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=387, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2023-11-24 22:06:31,572 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2023-11-24 22:06:31,572 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 387 flow [2023-11-24 22:06:31,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 22:06:31,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:31,574 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 22:06:31,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 22:06:31,575 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:31,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:31,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1186109909, now seen corresponding path program 1 times [2023-11-24 22:06:31,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:31,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31853333] [2023-11-24 22:06:31,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:31,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:31,969 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 22:06:31,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:31,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31853333] [2023-11-24 22:06:31,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31853333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:31,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:31,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 22:06:31,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479435120] [2023-11-24 22:06:31,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:31,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 22:06:31,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:31,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 22:06:31,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-24 22:06:32,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-24 22:06:32,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 387 flow. Second operand has 8 states, 8 states have (on average 30.125) internal successors, (241), 8 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 22:06:32,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:32,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-24 22:06:32,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:33,002 INFO L124 PetriNetUnfolderBase]: 1961/4118 cut-off events. [2023-11-24 22:06:33,002 INFO L125 PetriNetUnfolderBase]: For 1676/1676 co-relation queries the response was YES. [2023-11-24 22:06:33,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9983 conditions, 4118 events. 1961/4118 cut-off events. For 1676/1676 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 25189 event pairs, 461 based on Foata normal form. 0/3954 useless extension candidates. Maximal degree in co-relation 8956. Up to 2946 conditions per place. [2023-11-24 22:06:33,039 INFO L140 encePairwiseOnDemand]: 59/68 looper letters, 112 selfloop transitions, 9 changer transitions 0/139 dead transitions. [2023-11-24 22:06:33,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 139 transitions, 804 flow [2023-11-24 22:06:33,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 22:06:33,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-24 22:06:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 317 transitions. [2023-11-24 22:06:33,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5827205882352942 [2023-11-24 22:06:33,042 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 317 transitions. [2023-11-24 22:06:33,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 317 transitions. [2023-11-24 22:06:33,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:33,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 317 transitions. [2023-11-24 22:06:33,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 39.625) internal successors, (317), 8 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 22:06:33,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 68.0) internal successors, (612), 9 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 22:06:33,045 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 68.0) internal successors, (612), 9 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 22:06:33,046 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 387 flow. Second operand 8 states and 317 transitions. [2023-11-24 22:06:33,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 139 transitions, 804 flow [2023-11-24 22:06:33,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 139 transitions, 793 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:06:33,066 INFO L231 Difference]: Finished difference. Result has 97 places, 88 transitions, 442 flow [2023-11-24 22:06:33,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=442, PETRI_PLACES=97, PETRI_TRANSITIONS=88} [2023-11-24 22:06:33,067 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 34 predicate places. [2023-11-24 22:06:33,068 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 88 transitions, 442 flow [2023-11-24 22:06:33,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.125) internal successors, (241), 8 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 22:06:33,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:33,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:33,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 22:06:33,069 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:33,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:33,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1747460540, now seen corresponding path program 1 times [2023-11-24 22:06:33,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:33,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738426680] [2023-11-24 22:06:33,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:33,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:33,226 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 22:06:33,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:33,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738426680] [2023-11-24 22:06:33,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738426680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:33,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:33,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:06:33,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159276340] [2023-11-24 22:06:33,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:33,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:06:33,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:33,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:06:33,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:06:33,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-24 22:06:33,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 88 transitions, 442 flow. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 22:06:33,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:33,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-24 22:06:33,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:34,005 INFO L124 PetriNetUnfolderBase]: 1925/4047 cut-off events. [2023-11-24 22:06:34,005 INFO L125 PetriNetUnfolderBase]: For 1681/1681 co-relation queries the response was YES. [2023-11-24 22:06:34,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10066 conditions, 4047 events. 1925/4047 cut-off events. For 1681/1681 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 25023 event pairs, 1051 based on Foata normal form. 46/3957 useless extension candidates. Maximal degree in co-relation 9020. Up to 2255 conditions per place. [2023-11-24 22:06:34,049 INFO L140 encePairwiseOnDemand]: 61/68 looper letters, 59 selfloop transitions, 21 changer transitions 0/98 dead transitions. [2023-11-24 22:06:34,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 98 transitions, 630 flow [2023-11-24 22:06:34,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:06:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 22:06:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2023-11-24 22:06:34,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538235294117647 [2023-11-24 22:06:34,051 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 183 transitions. [2023-11-24 22:06:34,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 183 transitions. [2023-11-24 22:06:34,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:34,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 183 transitions. [2023-11-24 22:06:34,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:34,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 22:06:34,055 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 22:06:34,055 INFO L175 Difference]: Start difference. First operand has 97 places, 88 transitions, 442 flow. Second operand 5 states and 183 transitions. [2023-11-24 22:06:34,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 98 transitions, 630 flow [2023-11-24 22:06:34,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 98 transitions, 621 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 22:06:34,070 INFO L231 Difference]: Finished difference. Result has 96 places, 87 transitions, 473 flow [2023-11-24 22:06:34,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=473, PETRI_PLACES=96, PETRI_TRANSITIONS=87} [2023-11-24 22:06:34,071 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 33 predicate places. [2023-11-24 22:06:34,071 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 87 transitions, 473 flow [2023-11-24 22:06:34,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 22:06:34,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:34,072 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, 1, 1, 1] [2023-11-24 22:06:34,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 22:06:34,073 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:34,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:34,073 INFO L85 PathProgramCache]: Analyzing trace with hash -702107369, now seen corresponding path program 1 times [2023-11-24 22:06:34,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:34,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168947924] [2023-11-24 22:06:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:34,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:34,178 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 22:06:34,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:34,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168947924] [2023-11-24 22:06:34,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168947924] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:34,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:34,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:06:34,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607338011] [2023-11-24 22:06:34,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:34,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:06:34,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:34,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:06:34,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:06:34,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-24 22:06:34,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 87 transitions, 473 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 22:06:34,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:34,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-24 22:06:34,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:35,125 INFO L124 PetriNetUnfolderBase]: 2280/4738 cut-off events. [2023-11-24 22:06:35,125 INFO L125 PetriNetUnfolderBase]: For 3380/3380 co-relation queries the response was YES. [2023-11-24 22:06:35,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12373 conditions, 4738 events. 2280/4738 cut-off events. For 3380/3380 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 29977 event pairs, 386 based on Foata normal form. 56/4670 useless extension candidates. Maximal degree in co-relation 10465. Up to 1920 conditions per place. [2023-11-24 22:06:35,189 INFO L140 encePairwiseOnDemand]: 62/68 looper letters, 108 selfloop transitions, 10 changer transitions 0/136 dead transitions. [2023-11-24 22:06:35,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 136 transitions, 953 flow [2023-11-24 22:06:35,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:06:35,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 22:06:35,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 214 transitions. [2023-11-24 22:06:35,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6294117647058823 [2023-11-24 22:06:35,192 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 214 transitions. [2023-11-24 22:06:35,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 214 transitions. [2023-11-24 22:06:35,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:35,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 214 transitions. [2023-11-24 22:06:35,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states 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 22:06:35,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 22:06:35,195 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 22:06:35,195 INFO L175 Difference]: Start difference. First operand has 96 places, 87 transitions, 473 flow. Second operand 5 states and 214 transitions. [2023-11-24 22:06:35,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 136 transitions, 953 flow [2023-11-24 22:06:35,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 136 transitions, 893 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-24 22:06:35,217 INFO L231 Difference]: Finished difference. Result has 99 places, 92 transitions, 507 flow [2023-11-24 22:06:35,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=507, PETRI_PLACES=99, PETRI_TRANSITIONS=92} [2023-11-24 22:06:35,219 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 36 predicate places. [2023-11-24 22:06:35,220 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 92 transitions, 507 flow [2023-11-24 22:06:35,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 22:06:35,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:35,220 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, 1, 1, 1, 1] [2023-11-24 22:06:35,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 22:06:35,221 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:35,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:35,223 INFO L85 PathProgramCache]: Analyzing trace with hash -259213852, now seen corresponding path program 1 times [2023-11-24 22:06:35,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:35,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702483945] [2023-11-24 22:06:35,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:35,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:35,937 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 22:06:35,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:35,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702483945] [2023-11-24 22:06:35,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702483945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:35,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:35,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 22:06:35,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608182458] [2023-11-24 22:06:35,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:35,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 22:06:35,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:35,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 22:06:35,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-24 22:06:36,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-24 22:06:36,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 92 transitions, 507 flow. Second operand has 9 states, 9 states have (on average 31.11111111111111) internal successors, (280), 9 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 22:06:36,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:36,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-24 22:06:36,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:38,083 INFO L124 PetriNetUnfolderBase]: 4238/8899 cut-off events. [2023-11-24 22:06:38,084 INFO L125 PetriNetUnfolderBase]: For 7170/7170 co-relation queries the response was YES. [2023-11-24 22:06:38,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23116 conditions, 8899 events. 4238/8899 cut-off events. For 7170/7170 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 63866 event pairs, 1020 based on Foata normal form. 0/8697 useless extension candidates. Maximal degree in co-relation 19216. Up to 3469 conditions per place. [2023-11-24 22:06:38,188 INFO L140 encePairwiseOnDemand]: 60/68 looper letters, 199 selfloop transitions, 22 changer transitions 0/239 dead transitions. [2023-11-24 22:06:38,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 239 transitions, 1679 flow [2023-11-24 22:06:38,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 22:06:38,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 22:06:38,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 424 transitions. [2023-11-24 22:06:38,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6235294117647059 [2023-11-24 22:06:38,294 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 424 transitions. [2023-11-24 22:06:38,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 424 transitions. [2023-11-24 22:06:38,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:38,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 424 transitions. [2023-11-24 22:06:38,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 42.4) internal successors, (424), 10 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 22:06:38,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 68.0) internal successors, (748), 11 states have internal predecessors, (748), 0 states have call successors, (0), 0 states 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 22:06:38,298 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 68.0) internal successors, (748), 11 states have internal predecessors, (748), 0 states have call successors, (0), 0 states 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 22:06:38,299 INFO L175 Difference]: Start difference. First operand has 99 places, 92 transitions, 507 flow. Second operand 10 states and 424 transitions. [2023-11-24 22:06:38,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 239 transitions, 1679 flow [2023-11-24 22:06:38,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 239 transitions, 1669 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-24 22:06:38,347 INFO L231 Difference]: Finished difference. Result has 111 places, 108 transitions, 696 flow [2023-11-24 22:06:38,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=696, PETRI_PLACES=111, PETRI_TRANSITIONS=108} [2023-11-24 22:06:38,348 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 48 predicate places. [2023-11-24 22:06:38,348 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 108 transitions, 696 flow [2023-11-24 22:06:38,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 31.11111111111111) internal successors, (280), 9 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 22:06:38,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:38,349 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, 1, 1, 1, 1, 1] [2023-11-24 22:06:38,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 22:06:38,349 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:38,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:38,350 INFO L85 PathProgramCache]: Analyzing trace with hash 236622506, now seen corresponding path program 1 times [2023-11-24 22:06:38,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:38,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352379177] [2023-11-24 22:06:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:38,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:38,417 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 22:06:38,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:38,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352379177] [2023-11-24 22:06:38,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352379177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:38,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:38,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:06:38,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422036607] [2023-11-24 22:06:38,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:38,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:38,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:38,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:38,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:38,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-24 22:06:38,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 108 transitions, 696 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 22:06:38,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:38,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-24 22:06:38,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:40,693 INFO L124 PetriNetUnfolderBase]: 5337/11228 cut-off events. [2023-11-24 22:06:40,693 INFO L125 PetriNetUnfolderBase]: For 11461/11461 co-relation queries the response was YES. [2023-11-24 22:06:40,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30380 conditions, 11228 events. 5337/11228 cut-off events. For 11461/11461 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 85749 event pairs, 3242 based on Foata normal form. 137/11100 useless extension candidates. Maximal degree in co-relation 24796. Up to 7542 conditions per place. [2023-11-24 22:06:40,869 INFO L140 encePairwiseOnDemand]: 65/68 looper letters, 147 selfloop transitions, 2 changer transitions 0/167 dead transitions. [2023-11-24 22:06:40,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 167 transitions, 1408 flow [2023-11-24 22:06:40,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2023-11-24 22:06:40,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7009803921568627 [2023-11-24 22:06:40,871 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 143 transitions. [2023-11-24 22:06:40,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 143 transitions. [2023-11-24 22:06:40,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:40,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 143 transitions. [2023-11-24 22:06:40,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 22:06:40,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:40,875 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:40,875 INFO L175 Difference]: Start difference. First operand has 111 places, 108 transitions, 696 flow. Second operand 3 states and 143 transitions. [2023-11-24 22:06:40,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 167 transitions, 1408 flow [2023-11-24 22:06:40,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 167 transitions, 1397 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:40,944 INFO L231 Difference]: Finished difference. Result has 112 places, 109 transitions, 700 flow [2023-11-24 22:06:40,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=700, PETRI_PLACES=112, PETRI_TRANSITIONS=109} [2023-11-24 22:06:40,945 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 49 predicate places. [2023-11-24 22:06:40,945 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 109 transitions, 700 flow [2023-11-24 22:06:40,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 22:06:40,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:40,946 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:40,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 22:06:40,946 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:40,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:40,947 INFO L85 PathProgramCache]: Analyzing trace with hash -619607885, now seen corresponding path program 1 times [2023-11-24 22:06:40,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:40,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450576937] [2023-11-24 22:06:40,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:40,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:41,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:41,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450576937] [2023-11-24 22:06:41,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450576937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:06:41,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134695440] [2023-11-24 22:06:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:41,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:06:41,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:06:41,161 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:06:41,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 22:06:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:41,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 22:06:41,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:06:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:41,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:06:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:41,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134695440] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:06:41,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:06:41,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-24 22:06:41,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453239611] [2023-11-24 22:06:41,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:06:41,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 22:06:41,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:41,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 22:06:41,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-24 22:06:41,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-24 22:06:41,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 109 transitions, 700 flow. Second operand has 9 states, 9 states have (on average 34.888888888888886) internal successors, (314), 9 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:41,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:41,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-24 22:06:41,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:44,570 INFO L124 PetriNetUnfolderBase]: 6296/13384 cut-off events. [2023-11-24 22:06:44,570 INFO L125 PetriNetUnfolderBase]: For 15530/15548 co-relation queries the response was YES. [2023-11-24 22:06:44,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38309 conditions, 13384 events. 6296/13384 cut-off events. For 15530/15548 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 96078 event pairs, 1272 based on Foata normal form. 234/13366 useless extension candidates. Maximal degree in co-relation 28434. Up to 2073 conditions per place. [2023-11-24 22:06:44,771 INFO L140 encePairwiseOnDemand]: 64/68 looper letters, 247 selfloop transitions, 39 changer transitions 0/304 dead transitions. [2023-11-24 22:06:44,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 304 transitions, 2227 flow [2023-11-24 22:06:44,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 22:06:44,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-24 22:06:44,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 465 transitions. [2023-11-24 22:06:44,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7598039215686274 [2023-11-24 22:06:44,775 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 465 transitions. [2023-11-24 22:06:44,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 465 transitions. [2023-11-24 22:06:44,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:44,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 465 transitions. [2023-11-24 22:06:44,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 51.666666666666664) internal successors, (465), 9 states have internal predecessors, (465), 0 states have call successors, (0), 0 states 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 22:06:44,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 68.0) internal successors, (680), 10 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 22:06:44,779 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 68.0) internal successors, (680), 10 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 22:06:44,780 INFO L175 Difference]: Start difference. First operand has 112 places, 109 transitions, 700 flow. Second operand 9 states and 465 transitions. [2023-11-24 22:06:44,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 304 transitions, 2227 flow [2023-11-24 22:06:44,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 304 transitions, 2182 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:44,950 INFO L231 Difference]: Finished difference. Result has 124 places, 125 transitions, 984 flow [2023-11-24 22:06:44,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=984, PETRI_PLACES=124, PETRI_TRANSITIONS=125} [2023-11-24 22:06:44,951 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 61 predicate places. [2023-11-24 22:06:44,951 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 125 transitions, 984 flow [2023-11-24 22:06:44,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.888888888888886) internal successors, (314), 9 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:44,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:44,952 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:44,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 22:06:45,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-24 22:06:45,157 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:45,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:45,158 INFO L85 PathProgramCache]: Analyzing trace with hash -697869323, now seen corresponding path program 1 times [2023-11-24 22:06:45,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:45,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902900570] [2023-11-24 22:06:45,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:45,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:45,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:45,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902900570] [2023-11-24 22:06:45,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902900570] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:06:45,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232855577] [2023-11-24 22:06:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:45,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:06:45,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:06:45,589 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:06:45,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 22:06:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:45,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-24 22:06:45,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:06:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:46,177 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:06:46,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232855577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:46,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:06:46,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 14 [2023-11-24 22:06:46,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829264800] [2023-11-24 22:06:46,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:46,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 22:06:46,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:46,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 22:06:46,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-24 22:06:46,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-24 22:06:46,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 125 transitions, 984 flow. Second operand has 9 states, 9 states have (on average 30.77777777777778) internal successors, (277), 9 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:46,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:46,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-24 22:06:46,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:50,943 INFO L124 PetriNetUnfolderBase]: 8993/18898 cut-off events. [2023-11-24 22:06:50,943 INFO L125 PetriNetUnfolderBase]: For 24789/24789 co-relation queries the response was YES. [2023-11-24 22:06:51,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55199 conditions, 18898 events. 8993/18898 cut-off events. For 24789/24789 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 139899 event pairs, 2009 based on Foata normal form. 91/18599 useless extension candidates. Maximal degree in co-relation 43590. Up to 4847 conditions per place. [2023-11-24 22:06:51,176 INFO L140 encePairwiseOnDemand]: 57/68 looper letters, 196 selfloop transitions, 77 changer transitions 0/290 dead transitions. [2023-11-24 22:06:51,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 290 transitions, 2527 flow [2023-11-24 22:06:51,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 22:06:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-24 22:06:51,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 455 transitions. [2023-11-24 22:06:51,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6082887700534759 [2023-11-24 22:06:51,181 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 455 transitions. [2023-11-24 22:06:51,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 455 transitions. [2023-11-24 22:06:51,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:51,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 455 transitions. [2023-11-24 22:06:51,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 41.36363636363637) internal successors, (455), 11 states have internal predecessors, (455), 0 states have call successors, (0), 0 states 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 22:06:51,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 68.0) internal successors, (816), 12 states have internal predecessors, (816), 0 states have call successors, (0), 0 states 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 22:06:51,188 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 68.0) internal successors, (816), 12 states have internal predecessors, (816), 0 states have call successors, (0), 0 states 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 22:06:51,188 INFO L175 Difference]: Start difference. First operand has 124 places, 125 transitions, 984 flow. Second operand 11 states and 455 transitions. [2023-11-24 22:06:51,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 290 transitions, 2527 flow [2023-11-24 22:06:51,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 290 transitions, 2451 flow, removed 36 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:51,333 INFO L231 Difference]: Finished difference. Result has 141 places, 172 transitions, 1748 flow [2023-11-24 22:06:51,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1748, PETRI_PLACES=141, PETRI_TRANSITIONS=172} [2023-11-24 22:06:51,334 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 78 predicate places. [2023-11-24 22:06:51,334 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 172 transitions, 1748 flow [2023-11-24 22:06:51,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.77777777777778) internal successors, (277), 9 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:51,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:51,335 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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 22:06:51,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 22:06:51,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:06:51,543 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:51,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:51,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1668046046, now seen corresponding path program 1 times [2023-11-24 22:06:51,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:51,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760159481] [2023-11-24 22:06:51,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:51,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 22:06:51,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:51,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760159481] [2023-11-24 22:06:51,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760159481] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:06:51,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569427835] [2023-11-24 22:06:51,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:51,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:06:51,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:06:51,753 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:06:51,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 22:06:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:51,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 22:06:51,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:06:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 22:06:51,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:06:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 22:06:52,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569427835] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:06:52,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:06:52,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-11-24 22:06:52,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960339112] [2023-11-24 22:06:52,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:06:52,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:06:52,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:52,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:06:52,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:06:52,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-24 22:06:52,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 172 transitions, 1748 flow. Second operand has 6 states, 6 states have (on average 33.333333333333336) internal successors, (200), 6 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 22:06:52,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:52,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-24 22:06:52,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:55,885 INFO L124 PetriNetUnfolderBase]: 7386/15678 cut-off events. [2023-11-24 22:06:55,886 INFO L125 PetriNetUnfolderBase]: For 29460/29460 co-relation queries the response was YES. [2023-11-24 22:06:56,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49711 conditions, 15678 events. 7386/15678 cut-off events. For 29460/29460 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 112280 event pairs, 2489 based on Foata normal form. 14/15358 useless extension candidates. Maximal degree in co-relation 38431. Up to 11243 conditions per place. [2023-11-24 22:06:56,088 INFO L140 encePairwiseOnDemand]: 63/68 looper letters, 176 selfloop transitions, 13 changer transitions 0/207 dead transitions. [2023-11-24 22:06:56,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 207 transitions, 2173 flow [2023-11-24 22:06:56,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:06:56,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 22:06:56,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2023-11-24 22:06:56,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6794117647058824 [2023-11-24 22:06:56,091 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 231 transitions. [2023-11-24 22:06:56,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 231 transitions. [2023-11-24 22:06:56,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:56,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 231 transitions. [2023-11-24 22:06:56,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 22:06:56,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 22:06:56,094 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 22:06:56,095 INFO L175 Difference]: Start difference. First operand has 141 places, 172 transitions, 1748 flow. Second operand 5 states and 231 transitions. [2023-11-24 22:06:56,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 207 transitions, 2173 flow [2023-11-24 22:06:56,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 207 transitions, 2116 flow, removed 24 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:56,307 INFO L231 Difference]: Finished difference. Result has 145 places, 159 transitions, 1595 flow [2023-11-24 22:06:56,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1595, PETRI_PLACES=145, PETRI_TRANSITIONS=159} [2023-11-24 22:06:56,308 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 82 predicate places. [2023-11-24 22:06:56,308 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 159 transitions, 1595 flow [2023-11-24 22:06:56,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.333333333333336) internal successors, (200), 6 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 22:06:56,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:56,309 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:56,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 22:06:56,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:06:56,523 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-24 22:06:56,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:56,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1728080570, now seen corresponding path program 1 times [2023-11-24 22:06:56,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:56,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705729797] [2023-11-24 22:06:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:56,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:56,640 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 22:06:56,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:56,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705729797] [2023-11-24 22:06:56,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705729797] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:06:56,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43993937] [2023-11-24 22:06:56,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:56,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:06:56,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:06:56,643 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:06:56,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e1b21e-6546-4ce6-bbe9-177613d1db2f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 22:06:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:56,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:06:56,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:06:56,844 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 22:06:56,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:06:56,882 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 22:06:56,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43993937] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:06:56,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:06:56,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-24 22:06:56,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217072122] [2023-11-24 22:06:56,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:06:56,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 22:06:56,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:56,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 22:06:56,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:06:56,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-24 22:06:56,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 159 transitions, 1595 flow. Second operand has 7 states, 7 states have (on average 33.857142857142854) internal successors, (237), 7 states have internal predecessors, (237), 0 states have call successors, (0), 0 states 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 22:06:56,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:56,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-24 22:06:56,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand