./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe014_rmo.opt.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_3b49c627-c6cc-4523-8c22-12dba46f7b87/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b49c627-c6cc-4523-8c22-12dba46f7b87/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_3b49c627-c6cc-4523-8c22-12dba46f7b87/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b49c627-c6cc-4523-8c22-12dba46f7b87/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe014_rmo.opt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b49c627-c6cc-4523-8c22-12dba46f7b87/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_3b49c627-c6cc-4523-8c22-12dba46f7b87/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 09aaf4da9760e082dee1b84490861799ac10c7d3871bbdf2d8243e88d9e00b49 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:42:43,690 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:42:43,775 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b49c627-c6cc-4523-8c22-12dba46f7b87/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:42:43,781 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:42:43,781 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:42:43,806 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:42:43,807 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:42:43,807 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:42:43,808 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:42:43,809 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:42:43,810 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:42:43,810 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:42:43,811 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:42:43,812 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:42:43,813 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:42:43,813 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:42:43,814 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:42:43,815 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:42:43,815 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:42:43,816 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:42:43,816 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:42:43,817 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:42:43,818 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:42:43,818 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:42:43,819 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:42:43,820 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:42:43,820 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:42:43,821 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:42:43,821 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:42:43,822 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:42:43,822 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:42:43,823 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:42:43,823 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:42:43,824 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:42:43,825 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:42:43,825 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:42:43,825 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:42:43,826 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:42:43,826 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:42:43,827 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:42:43,827 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:42:43,828 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_3b49c627-c6cc-4523-8c22-12dba46f7b87/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b49c627-c6cc-4523-8c22-12dba46f7b87/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09aaf4da9760e082dee1b84490861799ac10c7d3871bbdf2d8243e88d9e00b49 [2023-11-24 21:42:44,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:42:44,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:42:44,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:42:44,132 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:42:44,132 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:42:44,134 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b49c627-c6cc-4523-8c22-12dba46f7b87/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread-wmm/safe014_rmo.opt.i [2023-11-24 21:42:47,272 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:42:47,584 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:42:47,585 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b49c627-c6cc-4523-8c22-12dba46f7b87/sv-benchmarks/c/pthread-wmm/safe014_rmo.opt.i [2023-11-24 21:42:47,603 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b49c627-c6cc-4523-8c22-12dba46f7b87/bin/uautomizer-verify-NlZe1sFDwI/data/f2d70a64a/b13cd9765abb4b5196bd76a3b5c133de/FLAG7393b72fb [2023-11-24 21:42:47,618 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b49c627-c6cc-4523-8c22-12dba46f7b87/bin/uautomizer-verify-NlZe1sFDwI/data/f2d70a64a/b13cd9765abb4b5196bd76a3b5c133de [2023-11-24 21:42:47,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:42:47,623 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:42:47,624 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:42:47,625 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:42:47,630 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:42:47,631 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:42:47" (1/1) ... [2023-11-24 21:42:47,632 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@645ae3ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:47, skipping insertion in model container [2023-11-24 21:42:47,632 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:42:47" (1/1) ... [2023-11-24 21:42:47,685 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:42:48,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:42:48,153 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:42:48,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:42:48,262 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:42:48,262 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:42:48,270 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:42:48,306 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:48 WrapperNode [2023-11-24 21:42:48,308 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:42:48,314 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:42:48,314 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:42:48,314 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:42:48,322 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:48" (1/1) ... [2023-11-24 21:42:48,361 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:48" (1/1) ... [2023-11-24 21:42:48,443 INFO L138 Inliner]: procedures = 176, calls = 83, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 172 [2023-11-24 21:42:48,445 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:42:48,446 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:42:48,446 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:42:48,446 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:42:48,458 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:48" (1/1) ... [2023-11-24 21:42:48,459 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:48" (1/1) ... [2023-11-24 21:42:48,477 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:48" (1/1) ... [2023-11-24 21:42:48,507 INFO L175 MemorySlicer]: Split 33 memory accesses to 5 slices as follows [2, 28, 1, 1, 1]. 85 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0, 0, 0]. The 14 writes are split as follows [0, 11, 1, 1, 1]. [2023-11-24 21:42:48,516 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:48" (1/1) ... [2023-11-24 21:42:48,516 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:48" (1/1) ... [2023-11-24 21:42:48,536 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:48" (1/1) ... [2023-11-24 21:42:48,548 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:48" (1/1) ... [2023-11-24 21:42:48,564 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:48" (1/1) ... [2023-11-24 21:42:48,567 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:48" (1/1) ... [2023-11-24 21:42:48,573 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:42:48,574 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:42:48,574 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:42:48,575 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:42:48,575 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:48" (1/1) ... [2023-11-24 21:42:48,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:42:48,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b49c627-c6cc-4523-8c22-12dba46f7b87/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:42:48,609 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b49c627-c6cc-4523-8c22-12dba46f7b87/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:42:48,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b49c627-c6cc-4523-8c22-12dba46f7b87/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:42:48,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:42:48,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:42:48,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:42:48,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:42:48,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:42:48,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:42:48,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:42:48,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:42:48,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:42:48,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:42:48,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:42:48,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:42:48,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:42:48,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:42:48,660 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-24 21:42:48,660 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-24 21:42:48,660 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-24 21:42:48,660 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-24 21:42:48,661 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-24 21:42:48,661 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-24 21:42:48,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:42:48,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:42:48,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:42:48,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:42:48,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:42:48,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:42:48,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:42:48,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:42:48,664 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 21:42:48,847 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:42:48,849 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:42:49,554 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:42:50,329 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:42:50,329 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 21:42:50,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:42:50 BoogieIcfgContainer [2023-11-24 21:42:50,330 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:42:50,333 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:42:50,334 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:42:50,337 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:42:50,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:42:47" (1/3) ... [2023-11-24 21:42:50,338 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f17d38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:42:50, skipping insertion in model container [2023-11-24 21:42:50,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:48" (2/3) ... [2023-11-24 21:42:50,340 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f17d38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:42:50, skipping insertion in model container [2023-11-24 21:42:50,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:42:50" (3/3) ... [2023-11-24 21:42:50,341 INFO L112 eAbstractionObserver]: Analyzing ICFG safe014_rmo.opt.i [2023-11-24 21:42:50,362 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:42:50,363 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2023-11-24 21:42:50,363 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:42:50,558 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:42:50,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 106 transitions, 224 flow [2023-11-24 21:42:50,692 INFO L124 PetriNetUnfolderBase]: 2/103 cut-off events. [2023-11-24 21:42:50,693 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:42:50,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 103 events. 2/103 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 396 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2023-11-24 21:42:50,700 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 106 transitions, 224 flow [2023-11-24 21:42:50,717 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 103 transitions, 215 flow [2023-11-24 21:42:50,736 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:42:50,748 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;@411c9d01, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:42:50,749 INFO L358 AbstractCegarLoop]: Starting to check reachability of 101 error locations. [2023-11-24 21:42:50,754 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:42:50,754 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:42:50,755 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:42:50,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:50,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:42:50,756 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 21:42:50,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:50,761 INFO L85 PathProgramCache]: Analyzing trace with hash 30136, now seen corresponding path program 1 times [2023-11-24 21:42:50,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:42:50,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711585780] [2023-11-24 21:42:50,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:50,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:42:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:51,094 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 21:42:51,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:42:51,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711585780] [2023-11-24 21:42:51,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711585780] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:42:51,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:42:51,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:42:51,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546245673] [2023-11-24 21:42:51,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:51,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:42:51,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:42:51,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:42:51,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:42:51,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 106 [2023-11-24 21:42:51,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 103 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 21:42:51,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:51,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 106 [2023-11-24 21:42:51,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:00,769 INFO L124 PetriNetUnfolderBase]: 28568/43215 cut-off events. [2023-11-24 21:43:00,770 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-11-24 21:43:00,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83122 conditions, 43215 events. 28568/43215 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 3745. Compared 386950 event pairs, 25158 based on Foata normal form. 1300/21142 useless extension candidates. Maximal degree in co-relation 83108. Up to 35050 conditions per place. [2023-11-24 21:43:01,215 INFO L140 encePairwiseOnDemand]: 71/106 looper letters, 71 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-11-24 21:43:01,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 94 transitions, 343 flow [2023-11-24 21:43:01,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:01,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:01,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 198 transitions. [2023-11-24 21:43:01,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6226415094339622 [2023-11-24 21:43:01,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 198 transitions. [2023-11-24 21:43:01,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 198 transitions. [2023-11-24 21:43:01,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:01,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 198 transitions. [2023-11-24 21:43:01,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:01,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 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 21:43:01,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 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 21:43:01,256 INFO L175 Difference]: Start difference. First operand has 111 places, 103 transitions, 215 flow. Second operand 3 states and 198 transitions. [2023-11-24 21:43:01,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 94 transitions, 343 flow [2023-11-24 21:43:01,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 94 transitions, 340 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:43:01,271 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 148 flow [2023-11-24 21:43:01,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2023-11-24 21:43:01,278 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -33 predicate places. [2023-11-24 21:43:01,278 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 148 flow [2023-11-24 21:43:01,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 21:43:01,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:01,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:43:01,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:43:01,280 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 21:43:01,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:01,281 INFO L85 PathProgramCache]: Analyzing trace with hash 30137, now seen corresponding path program 1 times [2023-11-24 21:43:01,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:01,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823527455] [2023-11-24 21:43:01,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:01,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:01,492 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 21:43:01,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:01,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823527455] [2023-11-24 21:43:01,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823527455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:01,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:01,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:43:01,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766387376] [2023-11-24 21:43:01,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:01,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:01,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:01,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:01,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:01,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 106 [2023-11-24 21:43:01,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 148 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 21:43:01,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:01,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 106 [2023-11-24 21:43:01,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:08,285 INFO L124 PetriNetUnfolderBase]: 28568/43214 cut-off events. [2023-11-24 21:43:08,285 INFO L125 PetriNetUnfolderBase]: For 650/650 co-relation queries the response was YES. [2023-11-24 21:43:08,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83769 conditions, 43214 events. 28568/43214 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 3745. Compared 386912 event pairs, 25158 based on Foata normal form. 1/19842 useless extension candidates. Maximal degree in co-relation 83758. Up to 35049 conditions per place. [2023-11-24 21:43:08,637 INFO L140 encePairwiseOnDemand]: 103/106 looper letters, 70 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-11-24 21:43:08,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 340 flow [2023-11-24 21:43:08,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:08,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-11-24 21:43:08,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2023-11-24 21:43:08,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-11-24 21:43:08,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-11-24 21:43:08,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:08,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-11-24 21:43:08,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 21:43:08,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 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 21:43:08,655 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 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 21:43:08,655 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 148 flow. Second operand 3 states and 148 transitions. [2023-11-24 21:43:08,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 340 flow [2023-11-24 21:43:08,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 93 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:08,929 INFO L231 Difference]: Finished difference. Result has 77 places, 68 transitions, 146 flow [2023-11-24 21:43:08,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2023-11-24 21:43:08,930 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -34 predicate places. [2023-11-24 21:43:08,930 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 146 flow [2023-11-24 21:43:08,931 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 21:43:08,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:08,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:43:08,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:43:08,932 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 21:43:08,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:08,932 INFO L85 PathProgramCache]: Analyzing trace with hash 898768371, now seen corresponding path program 1 times [2023-11-24 21:43:08,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:08,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142639566] [2023-11-24 21:43:08,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:08,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:09,027 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 21:43:09,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:09,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142639566] [2023-11-24 21:43:09,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142639566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:09,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:09,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:09,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342857482] [2023-11-24 21:43:09,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:09,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:09,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:09,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:09,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:09,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 106 [2023-11-24 21:43:09,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 21:43:09,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:09,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 106 [2023-11-24 21:43:09,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:15,422 INFO L124 PetriNetUnfolderBase]: 28572/43081 cut-off events. [2023-11-24 21:43:15,422 INFO L125 PetriNetUnfolderBase]: For 650/650 co-relation queries the response was YES. [2023-11-24 21:43:15,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83645 conditions, 43081 events. 28572/43081 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 3745. Compared 383640 event pairs, 25288 based on Foata normal form. 0/19715 useless extension candidates. Maximal degree in co-relation 83634. Up to 35052 conditions per place. [2023-11-24 21:43:15,725 INFO L140 encePairwiseOnDemand]: 103/106 looper letters, 71 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-11-24 21:43:15,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 340 flow [2023-11-24 21:43:15,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:15,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2023-11-24 21:43:15,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591194968553459 [2023-11-24 21:43:15,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 146 transitions. [2023-11-24 21:43:15,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 146 transitions. [2023-11-24 21:43:15,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:15,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 146 transitions. [2023-11-24 21:43:15,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 21:43:15,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 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 21:43:15,734 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 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 21:43:15,734 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 146 flow. Second operand 3 states and 146 transitions. [2023-11-24 21:43:15,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 340 flow [2023-11-24 21:43:16,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:16,032 INFO L231 Difference]: Finished difference. Result has 76 places, 67 transitions, 144 flow [2023-11-24 21:43:16,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=76, PETRI_TRANSITIONS=67} [2023-11-24 21:43:16,034 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -35 predicate places. [2023-11-24 21:43:16,035 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 67 transitions, 144 flow [2023-11-24 21:43:16,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 21:43:16,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:16,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:43:16,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:43:16,036 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 21:43:16,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:16,037 INFO L85 PathProgramCache]: Analyzing trace with hash 898768372, now seen corresponding path program 1 times [2023-11-24 21:43:16,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:16,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968700907] [2023-11-24 21:43:16,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:16,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:16,182 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 21:43:16,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:16,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968700907] [2023-11-24 21:43:16,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968700907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:16,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:16,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:16,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611506562] [2023-11-24 21:43:16,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:16,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:16,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:16,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:16,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:16,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 106 [2023-11-24 21:43:16,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 67 transitions, 144 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 21:43:16,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:16,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 106 [2023-11-24 21:43:16,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:22,270 INFO L124 PetriNetUnfolderBase]: 28568/43076 cut-off events. [2023-11-24 21:43:22,270 INFO L125 PetriNetUnfolderBase]: For 654/654 co-relation queries the response was YES. [2023-11-24 21:43:22,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83635 conditions, 43076 events. 28568/43076 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 3745. Compared 383247 event pairs, 25284 based on Foata normal form. 5/19710 useless extension candidates. Maximal degree in co-relation 83625. Up to 35043 conditions per place. [2023-11-24 21:43:22,572 INFO L140 encePairwiseOnDemand]: 103/106 looper letters, 70 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-11-24 21:43:22,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 91 transitions, 336 flow [2023-11-24 21:43:22,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:22,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:22,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-11-24 21:43:22,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2023-11-24 21:43:22,574 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-11-24 21:43:22,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-11-24 21:43:22,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:22,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-11-24 21:43:22,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 21:43:22,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 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 21:43:22,578 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 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 21:43:22,578 INFO L175 Difference]: Start difference. First operand has 76 places, 67 transitions, 144 flow. Second operand 3 states and 148 transitions. [2023-11-24 21:43:22,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 91 transitions, 336 flow [2023-11-24 21:43:22,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 91 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:22,704 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 142 flow [2023-11-24 21:43:22,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2023-11-24 21:43:22,706 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -36 predicate places. [2023-11-24 21:43:22,706 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 142 flow [2023-11-24 21:43:22,707 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 21:43:22,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:22,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:43:22,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:43:22,708 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 21:43:22,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:22,712 INFO L85 PathProgramCache]: Analyzing trace with hash 2092062145, now seen corresponding path program 1 times [2023-11-24 21:43:22,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:22,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099710853] [2023-11-24 21:43:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:22,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:22,838 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 21:43:22,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:22,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099710853] [2023-11-24 21:43:22,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099710853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:22,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:22,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:22,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446592610] [2023-11-24 21:43:22,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:22,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:22,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:22,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:22,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:22,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 106 [2023-11-24 21:43:22,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 21:43:22,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:22,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 106 [2023-11-24 21:43:22,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:25,814 INFO L124 PetriNetUnfolderBase]: 11981/19317 cut-off events. [2023-11-24 21:43:25,814 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2023-11-24 21:43:25,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37165 conditions, 19317 events. 11981/19317 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 1520. Compared 167455 event pairs, 8073 based on Foata normal form. 0/11483 useless extension candidates. Maximal degree in co-relation 37154. Up to 10527 conditions per place. [2023-11-24 21:43:25,932 INFO L140 encePairwiseOnDemand]: 87/106 looper letters, 72 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2023-11-24 21:43:25,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 98 transitions, 366 flow [2023-11-24 21:43:25,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:25,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:43:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 199 transitions. [2023-11-24 21:43:25,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693396226415094 [2023-11-24 21:43:25,935 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 199 transitions. [2023-11-24 21:43:25,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 199 transitions. [2023-11-24 21:43:25,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:25,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 199 transitions. [2023-11-24 21:43:25,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 21:43:25,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 106.0) internal successors, (530), 5 states have internal predecessors, (530), 0 states have call successors, (0), 0 states 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 21:43:25,939 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 106.0) internal successors, (530), 5 states have internal predecessors, (530), 0 states have call successors, (0), 0 states 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 21:43:25,940 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 142 flow. Second operand 4 states and 199 transitions. [2023-11-24 21:43:25,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 98 transitions, 366 flow [2023-11-24 21:43:25,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 98 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:25,951 INFO L231 Difference]: Finished difference. Result has 76 places, 69 transitions, 220 flow [2023-11-24 21:43:25,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2023-11-24 21:43:25,954 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -35 predicate places. [2023-11-24 21:43:25,955 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 220 flow [2023-11-24 21:43:25,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 21:43:25,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:25,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:43:25,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:43:25,956 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 21:43:25,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:25,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2092062146, now seen corresponding path program 1 times [2023-11-24 21:43:25,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:25,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935522884] [2023-11-24 21:43:25,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:25,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:26,084 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 21:43:26,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:26,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935522884] [2023-11-24 21:43:26,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935522884] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:26,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:26,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:43:26,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613547443] [2023-11-24 21:43:26,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:26,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:26,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:26,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:26,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:26,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 106 [2023-11-24 21:43:26,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 69 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:26,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:26,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 106 [2023-11-24 21:43:26,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:27,168 INFO L124 PetriNetUnfolderBase]: 2656/4750 cut-off events. [2023-11-24 21:43:27,169 INFO L125 PetriNetUnfolderBase]: For 2326/2341 co-relation queries the response was YES. [2023-11-24 21:43:27,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12250 conditions, 4750 events. 2656/4750 cut-off events. For 2326/2341 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 37376 event pairs, 2294 based on Foata normal form. 1591/6042 useless extension candidates. Maximal degree in co-relation 12236. Up to 4161 conditions per place. [2023-11-24 21:43:27,202 INFO L140 encePairwiseOnDemand]: 94/106 looper letters, 38 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-11-24 21:43:27,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 276 flow [2023-11-24 21:43:27,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:27,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:27,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2023-11-24 21:43:27,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3836477987421384 [2023-11-24 21:43:27,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 122 transitions. [2023-11-24 21:43:27,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 122 transitions. [2023-11-24 21:43:27,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:27,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 122 transitions. [2023-11-24 21:43:27,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 21:43:27,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 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 21:43:27,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 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 21:43:27,208 INFO L175 Difference]: Start difference. First operand has 76 places, 69 transitions, 220 flow. Second operand 3 states and 122 transitions. [2023-11-24 21:43:27,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 276 flow [2023-11-24 21:43:27,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 58 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:43:27,213 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 198 flow [2023-11-24 21:43:27,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-11-24 21:43:27,214 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -45 predicate places. [2023-11-24 21:43:27,215 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 198 flow [2023-11-24 21:43:27,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:27,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:27,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:27,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:43:27,216 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 21:43:27,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:27,217 INFO L85 PathProgramCache]: Analyzing trace with hash 383408492, now seen corresponding path program 1 times [2023-11-24 21:43:27,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:27,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590932116] [2023-11-24 21:43:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:27,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:27,295 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 21:43:27,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:27,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590932116] [2023-11-24 21:43:27,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590932116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:27,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:27,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:27,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558523411] [2023-11-24 21:43:27,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:27,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:27,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:27,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:27,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:27,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 106 [2023-11-24 21:43:27,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 21:43:27,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:27,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 106 [2023-11-24 21:43:27,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:28,360 INFO L124 PetriNetUnfolderBase]: 2678/4780 cut-off events. [2023-11-24 21:43:28,360 INFO L125 PetriNetUnfolderBase]: For 2226/2234 co-relation queries the response was YES. [2023-11-24 21:43:28,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12332 conditions, 4780 events. 2678/4780 cut-off events. For 2226/2234 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 37518 event pairs, 1408 based on Foata normal form. 0/4484 useless extension candidates. Maximal degree in co-relation 12322. Up to 2433 conditions per place. [2023-11-24 21:43:28,386 INFO L140 encePairwiseOnDemand]: 103/106 looper letters, 47 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-24 21:43:28,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 66 transitions, 324 flow [2023-11-24 21:43:28,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:28,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2023-11-24 21:43:28,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36477987421383645 [2023-11-24 21:43:28,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 116 transitions. [2023-11-24 21:43:28,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 116 transitions. [2023-11-24 21:43:28,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:28,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 116 transitions. [2023-11-24 21:43:28,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 21:43:28,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 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 21:43:28,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 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 21:43:28,398 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 198 flow. Second operand 3 states and 116 transitions. [2023-11-24 21:43:28,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 66 transitions, 324 flow [2023-11-24 21:43:28,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 323 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:43:28,403 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 199 flow [2023-11-24 21:43:28,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=64, 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=199, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2023-11-24 21:43:28,405 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -45 predicate places. [2023-11-24 21:43:28,405 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 199 flow [2023-11-24 21:43:28,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 21:43:28,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:28,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:28,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:43:28,406 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 21:43:28,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:28,406 INFO L85 PathProgramCache]: Analyzing trace with hash 383408493, now seen corresponding path program 1 times [2023-11-24 21:43:28,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:28,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048559549] [2023-11-24 21:43:28,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:28,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:28,496 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 21:43:28,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:28,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048559549] [2023-11-24 21:43:28,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048559549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:28,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:28,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:28,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086334108] [2023-11-24 21:43:28,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:28,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:28,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:28,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:28,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:28,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 106 [2023-11-24 21:43:28,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:28,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:28,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 106 [2023-11-24 21:43:28,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:29,224 INFO L124 PetriNetUnfolderBase]: 2656/4743 cut-off events. [2023-11-24 21:43:29,224 INFO L125 PetriNetUnfolderBase]: For 2344/2352 co-relation queries the response was YES. [2023-11-24 21:43:29,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12319 conditions, 4743 events. 2656/4743 cut-off events. For 2344/2352 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 37243 event pairs, 1408 based on Foata normal form. 15/4462 useless extension candidates. Maximal degree in co-relation 12309. Up to 2433 conditions per place. [2023-11-24 21:43:29,248 INFO L140 encePairwiseOnDemand]: 103/106 looper letters, 46 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-24 21:43:29,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 323 flow [2023-11-24 21:43:29,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:29,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:29,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 118 transitions. [2023-11-24 21:43:29,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3710691823899371 [2023-11-24 21:43:29,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 118 transitions. [2023-11-24 21:43:29,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 118 transitions. [2023-11-24 21:43:29,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:29,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 118 transitions. [2023-11-24 21:43:29,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:29,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 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 21:43:29,253 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 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 21:43:29,253 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 199 flow. Second operand 3 states and 118 transitions. [2023-11-24 21:43:29,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 323 flow [2023-11-24 21:43:29,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 65 transitions, 319 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:29,257 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 197 flow [2023-11-24 21:43:29,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2023-11-24 21:43:29,258 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -46 predicate places. [2023-11-24 21:43:29,258 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 197 flow [2023-11-24 21:43:29,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:29,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:29,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:29,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:43:29,259 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 21:43:29,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:29,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1111307820, now seen corresponding path program 1 times [2023-11-24 21:43:29,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:29,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959730230] [2023-11-24 21:43:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:29,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:29,443 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 21:43:29,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:29,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959730230] [2023-11-24 21:43:29,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959730230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:29,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:29,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:43:29,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518418065] [2023-11-24 21:43:29,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:29,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:29,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:29,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:29,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:29,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 106 [2023-11-24 21:43:29,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 21:43:29,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:29,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 106 [2023-11-24 21:43:29,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:30,180 INFO L124 PetriNetUnfolderBase]: 2582/4635 cut-off events. [2023-11-24 21:43:30,180 INFO L125 PetriNetUnfolderBase]: For 2250/2256 co-relation queries the response was YES. [2023-11-24 21:43:30,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12049 conditions, 4635 events. 2582/4635 cut-off events. For 2250/2256 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 36147 event pairs, 954 based on Foata normal form. 0/4401 useless extension candidates. Maximal degree in co-relation 12039. Up to 3173 conditions per place. [2023-11-24 21:43:30,202 INFO L140 encePairwiseOnDemand]: 102/106 looper letters, 59 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2023-11-24 21:43:30,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 79 transitions, 416 flow [2023-11-24 21:43:30,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:30,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:30,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 132 transitions. [2023-11-24 21:43:30,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41509433962264153 [2023-11-24 21:43:30,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 132 transitions. [2023-11-24 21:43:30,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 132 transitions. [2023-11-24 21:43:30,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:30,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 132 transitions. [2023-11-24 21:43:30,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:30,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 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 21:43:30,206 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 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 21:43:30,206 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 197 flow. Second operand 3 states and 132 transitions. [2023-11-24 21:43:30,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 79 transitions, 416 flow [2023-11-24 21:43:30,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 79 transitions, 410 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:30,210 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 206 flow [2023-11-24 21:43:30,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2023-11-24 21:43:30,211 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -45 predicate places. [2023-11-24 21:43:30,211 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 206 flow [2023-11-24 21:43:30,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 21:43:30,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:30,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:30,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:43:30,212 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 21:43:30,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:30,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1479911234, now seen corresponding path program 1 times [2023-11-24 21:43:30,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:30,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387647801] [2023-11-24 21:43:30,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:30,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:30,332 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 21:43:30,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:30,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387647801] [2023-11-24 21:43:30,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387647801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:30,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:30,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:30,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636974514] [2023-11-24 21:43:30,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:30,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:30,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:30,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:30,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:30,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 106 [2023-11-24 21:43:30,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 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 21:43:30,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:30,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 106 [2023-11-24 21:43:30,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:31,280 INFO L124 PetriNetUnfolderBase]: 2702/5046 cut-off events. [2023-11-24 21:43:31,280 INFO L125 PetriNetUnfolderBase]: For 2402/2408 co-relation queries the response was YES. [2023-11-24 21:43:31,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13268 conditions, 5046 events. 2702/5046 cut-off events. For 2402/2408 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 41219 event pairs, 808 based on Foata normal form. 0/4910 useless extension candidates. Maximal degree in co-relation 13256. Up to 1768 conditions per place. [2023-11-24 21:43:31,315 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 48 selfloop transitions, 10 changer transitions 0/75 dead transitions. [2023-11-24 21:43:31,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 371 flow [2023-11-24 21:43:31,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:31,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:43:31,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 163 transitions. [2023-11-24 21:43:31,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38443396226415094 [2023-11-24 21:43:31,318 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 163 transitions. [2023-11-24 21:43:31,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 163 transitions. [2023-11-24 21:43:31,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:31,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 163 transitions. [2023-11-24 21:43:31,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.75) internal successors, (163), 4 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 21:43:31,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 106.0) internal successors, (530), 5 states have internal predecessors, (530), 0 states have call successors, (0), 0 states 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 21:43:31,322 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 106.0) internal successors, (530), 5 states have internal predecessors, (530), 0 states have call successors, (0), 0 states 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 21:43:31,322 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 206 flow. Second operand 4 states and 163 transitions. [2023-11-24 21:43:31,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 371 flow [2023-11-24 21:43:31,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 75 transitions, 365 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:31,327 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 221 flow [2023-11-24 21:43:31,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=221, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2023-11-24 21:43:31,330 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -45 predicate places. [2023-11-24 21:43:31,331 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 221 flow [2023-11-24 21:43:31,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 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 21:43:31,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:31,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:31,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:43:31,332 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 21:43:31,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:31,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1479911233, now seen corresponding path program 1 times [2023-11-24 21:43:31,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:31,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544587842] [2023-11-24 21:43:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:31,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:31,694 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 21:43:31,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:31,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544587842] [2023-11-24 21:43:31,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544587842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:31,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:31,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:31,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334812214] [2023-11-24 21:43:31,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:31,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:43:31,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:31,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:43:31,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:31,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 106 [2023-11-24 21:43:31,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 21:43:31,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:31,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 106 [2023-11-24 21:43:31,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:32,510 INFO L124 PetriNetUnfolderBase]: 2606/4861 cut-off events. [2023-11-24 21:43:32,510 INFO L125 PetriNetUnfolderBase]: For 3348/3354 co-relation queries the response was YES. [2023-11-24 21:43:32,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13266 conditions, 4861 events. 2606/4861 cut-off events. For 3348/3354 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 39748 event pairs, 920 based on Foata normal form. 45/4760 useless extension candidates. Maximal degree in co-relation 13254. Up to 3302 conditions per place. [2023-11-24 21:43:32,537 INFO L140 encePairwiseOnDemand]: 103/106 looper letters, 57 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2023-11-24 21:43:32,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 77 transitions, 433 flow [2023-11-24 21:43:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:32,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:43:32,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2023-11-24 21:43:32,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36556603773584906 [2023-11-24 21:43:32,539 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 155 transitions. [2023-11-24 21:43:32,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 155 transitions. [2023-11-24 21:43:32,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:32,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 155 transitions. [2023-11-24 21:43:32,540 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 21:43:32,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 106.0) internal successors, (530), 5 states have internal predecessors, (530), 0 states have call successors, (0), 0 states 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 21:43:32,542 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 106.0) internal successors, (530), 5 states have internal predecessors, (530), 0 states have call successors, (0), 0 states 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 21:43:32,542 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 221 flow. Second operand 4 states and 155 transitions. [2023-11-24 21:43:32,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 77 transitions, 433 flow [2023-11-24 21:43:32,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 77 transitions, 417 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:32,546 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 211 flow [2023-11-24 21:43:32,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=211, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2023-11-24 21:43:32,547 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -45 predicate places. [2023-11-24 21:43:32,547 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 211 flow [2023-11-24 21:43:32,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 21:43:32,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:32,548 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 21:43:32,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:43:32,548 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 21:43:32,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:32,549 INFO L85 PathProgramCache]: Analyzing trace with hash -649554794, now seen corresponding path program 1 times [2023-11-24 21:43:32,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:32,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866763262] [2023-11-24 21:43:32,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:32,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:33,201 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 21:43:33,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:33,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866763262] [2023-11-24 21:43:33,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866763262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:33,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:33,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:43:33,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330451260] [2023-11-24 21:43:33,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:33,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:43:33,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:33,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:43:33,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:43:33,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 106 [2023-11-24 21:43:33,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 211 flow. Second operand has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 0 states have call successors, (0), 0 states 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 21:43:33,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:33,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 106 [2023-11-24 21:43:33,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand