./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/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_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/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_dfa71d15-7648-4ed9-82a2-a965054b4fec/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 38e3acb82ec05e672eff9207911c10948d6c695f982992ce82b68981a799bba7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:54:25,767 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:54:25,855 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:54:25,860 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:54:25,861 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:54:25,889 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:54:25,890 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:54:25,891 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:54:25,891 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:54:25,892 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:54:25,893 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:54:25,893 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:54:25,894 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:54:25,895 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:54:25,895 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:54:25,896 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:54:25,897 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:54:25,897 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:54:25,898 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:54:25,898 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:54:25,899 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:54:25,900 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:54:25,900 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:54:25,901 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:54:25,901 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:54:25,902 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:54:25,903 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:54:25,903 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:54:25,904 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:54:25,904 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:54:25,905 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:54:25,906 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:54:25,906 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:54:25,907 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:54:25,907 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:54:25,908 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:54:25,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:54:25,909 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:54:25,910 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:54:25,910 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:54:25,911 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:54:25,912 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_dfa71d15-7648-4ed9-82a2-a965054b4fec/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38e3acb82ec05e672eff9207911c10948d6c695f982992ce82b68981a799bba7 [2023-11-24 21:54:26,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:54:26,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:54:26,294 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:54:26,297 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:54:26,298 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:54:26,299 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2023-11-24 21:54:29,516 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:54:29,741 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:54:29,741 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2023-11-24 21:54:29,750 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/data/e5b1ed80d/1d24d7d2179f41d6a1be8f40286bd72f/FLAG142f6cb93 [2023-11-24 21:54:29,767 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/data/e5b1ed80d/1d24d7d2179f41d6a1be8f40286bd72f [2023-11-24 21:54:29,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:54:29,771 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:54:29,773 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:54:29,773 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:54:29,779 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:54:29,780 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:54:29" (1/1) ... [2023-11-24 21:54:29,782 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@496890b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:29, skipping insertion in model container [2023-11-24 21:54:29,782 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:54:29" (1/1) ... [2023-11-24 21:54:29,808 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:54:30,036 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:54:30,047 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:54:30,074 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:54:30,088 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:54:30,088 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:54:30,099 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:54:30,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:30 WrapperNode [2023-11-24 21:54:30,100 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:54:30,102 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:54:30,106 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:54:30,106 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:54:30,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:30" (1/1) ... [2023-11-24 21:54:30,121 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:30" (1/1) ... [2023-11-24 21:54:30,149 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 127 [2023-11-24 21:54:30,149 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:54:30,150 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:54:30,150 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:54:30,151 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:54:30,160 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:30" (1/1) ... [2023-11-24 21:54:30,161 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:30" (1/1) ... [2023-11-24 21:54:30,164 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:30" (1/1) ... [2023-11-24 21:54:30,184 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-24 21:54:30,184 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:30" (1/1) ... [2023-11-24 21:54:30,185 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:30" (1/1) ... [2023-11-24 21:54:30,196 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:30" (1/1) ... [2023-11-24 21:54:30,201 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:30" (1/1) ... [2023-11-24 21:54:30,203 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:30" (1/1) ... [2023-11-24 21:54:30,205 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:30" (1/1) ... [2023-11-24 21:54:30,209 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:54:30,210 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:54:30,211 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:54:30,211 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:54:30,212 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:30" (1/1) ... [2023-11-24 21:54:30,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:54:30,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:54:30,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:54:30,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:54:30,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:54:30,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:54:30,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:54:30,308 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:54:30,308 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:54:30,308 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-24 21:54:30,308 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-24 21:54:30,308 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-24 21:54:30,309 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-24 21:54:30,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:54:30,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:54:30,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:54:30,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:54:30,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:54:30,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:54:30,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:54:30,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:54:30,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:54:30,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:54:30,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:54:30,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:54:30,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:54:30,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:54:30,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:54:30,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:54:30,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:54:30,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:54:30,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:54:30,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:54:30,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:54:30,320 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 21:54:30,517 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:54:30,526 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:54:30,907 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:54:31,209 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:54:31,211 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 21:54:31,212 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:54:31 BoogieIcfgContainer [2023-11-24 21:54:31,212 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:54:31,218 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:54:31,219 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:54:31,223 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:54:31,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:54:29" (1/3) ... [2023-11-24 21:54:31,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6487d174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:54:31, skipping insertion in model container [2023-11-24 21:54:31,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:30" (2/3) ... [2023-11-24 21:54:31,226 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6487d174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:54:31, skipping insertion in model container [2023-11-24 21:54:31,226 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:54:31" (3/3) ... [2023-11-24 21:54:31,228 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-11-24 21:54:31,254 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:54:31,254 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-24 21:54:31,255 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:54:31,368 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-24 21:54:31,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 69 transitions, 166 flow [2023-11-24 21:54:31,475 INFO L124 PetriNetUnfolderBase]: 4/65 cut-off events. [2023-11-24 21:54:31,475 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-24 21:54:31,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 65 events. 4/65 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 107 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-11-24 21:54:31,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 69 transitions, 166 flow [2023-11-24 21:54:31,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 64 transitions, 152 flow [2023-11-24 21:54:31,505 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:54:31,512 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;@535a5aea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:54:31,512 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-24 21:54:31,516 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:54:31,517 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:54:31,517 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:54:31,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:31,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:54:31,518 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:31,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:31,527 INFO L85 PathProgramCache]: Analyzing trace with hash 12661, now seen corresponding path program 1 times [2023-11-24 21:54:31,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:31,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783833463] [2023-11-24 21:54:31,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:31,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:32,071 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 21:54:32,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:32,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783833463] [2023-11-24 21:54:32,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783833463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:32,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:32,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:54:32,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920684127] [2023-11-24 21:54:32,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:32,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:32,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:32,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:32,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:32,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2023-11-24 21:54:32,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 21:54:32,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:32,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2023-11-24 21:54:32,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:33,054 INFO L124 PetriNetUnfolderBase]: 3501/5201 cut-off events. [2023-11-24 21:54:33,054 INFO L125 PetriNetUnfolderBase]: For 243/243 co-relation queries the response was YES. [2023-11-24 21:54:33,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9987 conditions, 5201 events. 3501/5201 cut-off events. For 243/243 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 27012 event pairs, 2562 based on Foata normal form. 1/4882 useless extension candidates. Maximal degree in co-relation 8922. Up to 4525 conditions per place. [2023-11-24 21:54:33,183 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 31 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-11-24 21:54:33,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 60 transitions, 208 flow [2023-11-24 21:54:33,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:33,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:33,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 134 transitions. [2023-11-24 21:54:33,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6473429951690821 [2023-11-24 21:54:33,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 134 transitions. [2023-11-24 21:54:33,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 134 transitions. [2023-11-24 21:54:33,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:33,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 134 transitions. [2023-11-24 21:54:33,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 21:54:33,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:33,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:33,218 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 152 flow. Second operand 3 states and 134 transitions. [2023-11-24 21:54:33,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 60 transitions, 208 flow [2023-11-24 21:54:33,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 60 transitions, 192 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-24 21:54:33,238 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 130 flow [2023-11-24 21:54:33,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2023-11-24 21:54:33,247 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -10 predicate places. [2023-11-24 21:54:33,247 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 130 flow [2023-11-24 21:54:33,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 21:54:33,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:33,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:54:33,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:54:33,249 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:33,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:33,250 INFO L85 PathProgramCache]: Analyzing trace with hash 12662, now seen corresponding path program 1 times [2023-11-24 21:54:33,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:33,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399557199] [2023-11-24 21:54:33,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:33,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:33,480 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 21:54:33,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:33,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399557199] [2023-11-24 21:54:33,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399557199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:33,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:33,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:54:33,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556584861] [2023-11-24 21:54:33,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:33,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:33,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:33,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:33,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:33,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2023-11-24 21:54:33,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 21:54:33,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:33,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2023-11-24 21:54:33,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:34,166 INFO L124 PetriNetUnfolderBase]: 3501/5136 cut-off events. [2023-11-24 21:54:34,167 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-24 21:54:34,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9750 conditions, 5136 events. 3501/5136 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 25926 event pairs, 2562 based on Foata normal form. 0/4816 useless extension candidates. Maximal degree in co-relation 9744. Up to 4525 conditions per place. [2023-11-24 21:54:34,209 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 31 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-11-24 21:54:34,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 58 transitions, 190 flow [2023-11-24 21:54:34,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:34,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-11-24 21:54:34,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.642512077294686 [2023-11-24 21:54:34,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-11-24 21:54:34,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-11-24 21:54:34,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:34,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-11-24 21:54:34,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:34,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:34,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:34,233 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 130 flow. Second operand 3 states and 133 transitions. [2023-11-24 21:54:34,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 58 transitions, 190 flow [2023-11-24 21:54:34,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 58 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:34,236 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 127 flow [2023-11-24 21:54:34,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=60, 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=127, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2023-11-24 21:54:34,237 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -11 predicate places. [2023-11-24 21:54:34,238 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 127 flow [2023-11-24 21:54:34,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 21:54:34,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:34,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:54:34,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:54:34,239 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:34,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:34,240 INFO L85 PathProgramCache]: Analyzing trace with hash 377575750, now seen corresponding path program 1 times [2023-11-24 21:54:34,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:34,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735452945] [2023-11-24 21:54:34,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:34,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:34,431 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 21:54:34,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:34,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735452945] [2023-11-24 21:54:34,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735452945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:34,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:34,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:54:34,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408346262] [2023-11-24 21:54:34,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:34,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:34,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:34,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:34,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:34,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2023-11-24 21:54:34,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 21:54:34,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:34,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2023-11-24 21:54:34,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:34,950 INFO L124 PetriNetUnfolderBase]: 2673/3986 cut-off events. [2023-11-24 21:54:34,950 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-24 21:54:34,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7584 conditions, 3986 events. 2673/3986 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 19901 event pairs, 1941 based on Foata normal form. 0/3833 useless extension candidates. Maximal degree in co-relation 7577. Up to 3508 conditions per place. [2023-11-24 21:54:34,979 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 31 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-11-24 21:54:34,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 187 flow [2023-11-24 21:54:34,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:34,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:34,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-11-24 21:54:34,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.642512077294686 [2023-11-24 21:54:34,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-11-24 21:54:34,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-11-24 21:54:34,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:34,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-11-24 21:54:34,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:34,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:34,984 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:34,984 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 127 flow. Second operand 3 states and 133 transitions. [2023-11-24 21:54:34,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 187 flow [2023-11-24 21:54:34,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 56 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:34,987 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 124 flow [2023-11-24 21:54:34,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-11-24 21:54:34,988 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -12 predicate places. [2023-11-24 21:54:34,988 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 124 flow [2023-11-24 21:54:34,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 21:54:34,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:34,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:54:34,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:54:34,989 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:34,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:34,990 INFO L85 PathProgramCache]: Analyzing trace with hash 377575751, now seen corresponding path program 1 times [2023-11-24 21:54:34,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:34,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826804082] [2023-11-24 21:54:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:34,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:35,085 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 21:54:35,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:35,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826804082] [2023-11-24 21:54:35,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826804082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:35,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:35,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:54:35,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236730279] [2023-11-24 21:54:35,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:35,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:35,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:35,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:35,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:35,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 69 [2023-11-24 21:54:35,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:35,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:35,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 69 [2023-11-24 21:54:35,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:35,604 INFO L124 PetriNetUnfolderBase]: 2477/3651 cut-off events. [2023-11-24 21:54:35,605 INFO L125 PetriNetUnfolderBase]: For 85/87 co-relation queries the response was YES. [2023-11-24 21:54:35,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6986 conditions, 3651 events. 2477/3651 cut-off events. For 85/87 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 18017 event pairs, 1794 based on Foata normal form. 52/3585 useless extension candidates. Maximal degree in co-relation 6978. Up to 3244 conditions per place. [2023-11-24 21:54:35,635 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 29 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-11-24 21:54:35,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 54 transitions, 180 flow [2023-11-24 21:54:35,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:35,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:35,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2023-11-24 21:54:35,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6618357487922706 [2023-11-24 21:54:35,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 137 transitions. [2023-11-24 21:54:35,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 137 transitions. [2023-11-24 21:54:35,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:35,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 137 transitions. [2023-11-24 21:54:35,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:35,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:35,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:35,642 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 124 flow. Second operand 3 states and 137 transitions. [2023-11-24 21:54:35,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 54 transitions, 180 flow [2023-11-24 21:54:35,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 179 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:35,646 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 121 flow [2023-11-24 21:54:35,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-11-24 21:54:35,650 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -13 predicate places. [2023-11-24 21:54:35,650 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 121 flow [2023-11-24 21:54:35,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:35,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:35,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:35,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:54:35,652 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:35,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:35,654 INFO L85 PathProgramCache]: Analyzing trace with hash -159784197, now seen corresponding path program 1 times [2023-11-24 21:54:35,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:35,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871677160] [2023-11-24 21:54:35,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:35,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:35,754 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 21:54:35,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:35,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871677160] [2023-11-24 21:54:35,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871677160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:35,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:35,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:54:35,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324849364] [2023-11-24 21:54:35,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:35,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:35,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:35,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:35,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:35,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2023-11-24 21:54:35,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 21:54:35,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:35,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2023-11-24 21:54:35,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:36,171 INFO L124 PetriNetUnfolderBase]: 2541/3730 cut-off events. [2023-11-24 21:54:36,172 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-11-24 21:54:36,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7162 conditions, 3730 events. 2541/3730 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 18192 event pairs, 1842 based on Foata normal form. 0/3640 useless extension candidates. Maximal degree in co-relation 7153. Up to 3340 conditions per place. [2023-11-24 21:54:36,205 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 31 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-11-24 21:54:36,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 181 flow [2023-11-24 21:54:36,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:36,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:36,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-11-24 21:54:36,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.642512077294686 [2023-11-24 21:54:36,208 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-11-24 21:54:36,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-11-24 21:54:36,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:36,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-11-24 21:54:36,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:36,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:36,211 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:36,211 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 121 flow. Second operand 3 states and 133 transitions. [2023-11-24 21:54:36,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 181 flow [2023-11-24 21:54:36,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 52 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:36,216 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 118 flow [2023-11-24 21:54:36,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2023-11-24 21:54:36,219 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -14 predicate places. [2023-11-24 21:54:36,220 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 118 flow [2023-11-24 21:54:36,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 21:54:36,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:36,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:36,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:54:36,221 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:36,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:36,222 INFO L85 PathProgramCache]: Analyzing trace with hash -159784196, now seen corresponding path program 1 times [2023-11-24 21:54:36,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:36,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337134814] [2023-11-24 21:54:36,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:36,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:36,320 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 21:54:36,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:36,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337134814] [2023-11-24 21:54:36,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337134814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:36,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:36,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:54:36,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896395546] [2023-11-24 21:54:36,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:36,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:36,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:36,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:36,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:36,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 69 [2023-11-24 21:54:36,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:36,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:36,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 69 [2023-11-24 21:54:36,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:36,725 INFO L124 PetriNetUnfolderBase]: 2477/3619 cut-off events. [2023-11-24 21:54:36,726 INFO L125 PetriNetUnfolderBase]: For 85/87 co-relation queries the response was YES. [2023-11-24 21:54:36,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6956 conditions, 3619 events. 2477/3619 cut-off events. For 85/87 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 17701 event pairs, 1794 based on Foata normal form. 28/3561 useless extension candidates. Maximal degree in co-relation 6946. Up to 3244 conditions per place. [2023-11-24 21:54:36,749 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 29 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-11-24 21:54:36,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 50 transitions, 174 flow [2023-11-24 21:54:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:36,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:36,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2023-11-24 21:54:36,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6618357487922706 [2023-11-24 21:54:36,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 137 transitions. [2023-11-24 21:54:36,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 137 transitions. [2023-11-24 21:54:36,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:36,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 137 transitions. [2023-11-24 21:54:36,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:36,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:36,754 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:36,754 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 118 flow. Second operand 3 states and 137 transitions. [2023-11-24 21:54:36,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 50 transitions, 174 flow [2023-11-24 21:54:36,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 50 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:36,756 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 115 flow [2023-11-24 21:54:36,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-11-24 21:54:36,757 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -15 predicate places. [2023-11-24 21:54:36,758 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 115 flow [2023-11-24 21:54:36,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:36,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:36,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:36,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:54:36,759 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:36,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:36,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1306856058, now seen corresponding path program 1 times [2023-11-24 21:54:36,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:36,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576706952] [2023-11-24 21:54:36,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:36,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:36,808 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 21:54:36,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:36,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576706952] [2023-11-24 21:54:36,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576706952] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:36,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:36,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:54:36,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656625570] [2023-11-24 21:54:36,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:36,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:36,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:36,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:36,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:36,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2023-11-24 21:54:36,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:36,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:36,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2023-11-24 21:54:36,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:37,216 INFO L124 PetriNetUnfolderBase]: 2673/3834 cut-off events. [2023-11-24 21:54:37,216 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-11-24 21:54:37,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7436 conditions, 3834 events. 2673/3834 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 18183 event pairs, 1941 based on Foata normal form. 0/3781 useless extension candidates. Maximal degree in co-relation 7425. Up to 3508 conditions per place. [2023-11-24 21:54:37,240 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 31 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-11-24 21:54:37,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 48 transitions, 175 flow [2023-11-24 21:54:37,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:37,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:37,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-11-24 21:54:37,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.642512077294686 [2023-11-24 21:54:37,243 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-11-24 21:54:37,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-11-24 21:54:37,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:37,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-11-24 21:54:37,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:37,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:37,245 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:37,246 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 115 flow. Second operand 3 states and 133 transitions. [2023-11-24 21:54:37,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 48 transitions, 175 flow [2023-11-24 21:54:37,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 48 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:37,248 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 112 flow [2023-11-24 21:54:37,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2023-11-24 21:54:37,249 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -16 predicate places. [2023-11-24 21:54:37,249 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 112 flow [2023-11-24 21:54:37,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:37,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:37,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:37,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:54:37,250 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:37,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:37,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1306856057, now seen corresponding path program 1 times [2023-11-24 21:54:37,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:37,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834469114] [2023-11-24 21:54:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:37,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:37,325 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 21:54:37,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:37,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834469114] [2023-11-24 21:54:37,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834469114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:37,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:37,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:54:37,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707115315] [2023-11-24 21:54:37,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:37,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:37,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:37,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:37,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:37,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 69 [2023-11-24 21:54:37,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 21:54:37,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:37,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 69 [2023-11-24 21:54:37,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:37,679 INFO L124 PetriNetUnfolderBase]: 2477/3585 cut-off events. [2023-11-24 21:54:37,679 INFO L125 PetriNetUnfolderBase]: For 85/87 co-relation queries the response was YES. [2023-11-24 21:54:37,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6924 conditions, 3585 events. 2477/3585 cut-off events. For 85/87 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 17231 event pairs, 1794 based on Foata normal form. 67/3600 useless extension candidates. Maximal degree in co-relation 6912. Up to 3244 conditions per place. [2023-11-24 21:54:37,743 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 29 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-24 21:54:37,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 46 transitions, 168 flow [2023-11-24 21:54:37,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:37,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:37,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2023-11-24 21:54:37,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6618357487922706 [2023-11-24 21:54:37,746 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 137 transitions. [2023-11-24 21:54:37,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 137 transitions. [2023-11-24 21:54:37,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:37,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 137 transitions. [2023-11-24 21:54:37,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:37,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:37,748 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:37,749 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 112 flow. Second operand 3 states and 137 transitions. [2023-11-24 21:54:37,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 46 transitions, 168 flow [2023-11-24 21:54:37,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 46 transitions, 167 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:37,751 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 109 flow [2023-11-24 21:54:37,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2023-11-24 21:54:37,752 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -17 predicate places. [2023-11-24 21:54:37,753 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 109 flow [2023-11-24 21:54:37,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 21:54:37,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:37,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:37,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:54:37,754 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:37,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:37,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1913338974, now seen corresponding path program 1 times [2023-11-24 21:54:37,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:37,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39895608] [2023-11-24 21:54:37,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:37,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:37,867 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 21:54:37,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:37,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39895608] [2023-11-24 21:54:37,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39895608] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:37,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:37,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:54:37,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778187629] [2023-11-24 21:54:37,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:37,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:37,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:37,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:37,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:37,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 69 [2023-11-24 21:54:37,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:37,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:37,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 69 [2023-11-24 21:54:37,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:38,463 INFO L124 PetriNetUnfolderBase]: 3331/4734 cut-off events. [2023-11-24 21:54:38,464 INFO L125 PetriNetUnfolderBase]: For 98/100 co-relation queries the response was YES. [2023-11-24 21:54:38,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9236 conditions, 4734 events. 3331/4734 cut-off events. For 98/100 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 21943 event pairs, 587 based on Foata normal form. 1/4701 useless extension candidates. Maximal degree in co-relation 9223. Up to 3534 conditions per place. [2023-11-24 21:54:38,503 INFO L140 encePairwiseOnDemand]: 63/69 looper letters, 47 selfloop transitions, 5 changer transitions 1/69 dead transitions. [2023-11-24 21:54:38,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 69 transitions, 268 flow [2023-11-24 21:54:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:38,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2023-11-24 21:54:38,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7971014492753623 [2023-11-24 21:54:38,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2023-11-24 21:54:38,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2023-11-24 21:54:38,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:38,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2023-11-24 21:54:38,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:38,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:38,509 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:38,509 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 109 flow. Second operand 3 states and 165 transitions. [2023-11-24 21:54:38,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 69 transitions, 268 flow [2023-11-24 21:54:38,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 267 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:38,512 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 141 flow [2023-11-24 21:54:38,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-11-24 21:54:38,514 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -15 predicate places. [2023-11-24 21:54:38,514 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 141 flow [2023-11-24 21:54:38,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:38,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:38,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:38,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:54:38,515 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:38,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:38,516 INFO L85 PathProgramCache]: Analyzing trace with hash -2039094617, now seen corresponding path program 1 times [2023-11-24 21:54:38,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:38,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347189615] [2023-11-24 21:54:38,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:38,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:38,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:38,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347189615] [2023-11-24 21:54:38,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347189615] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:38,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:38,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:54:38,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540505985] [2023-11-24 21:54:38,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:38,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:54:38,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:38,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:54:38,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:54:38,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 69 [2023-11-24 21:54:38,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:38,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:38,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 69 [2023-11-24 21:54:38,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:39,654 INFO L124 PetriNetUnfolderBase]: 7556/10594 cut-off events. [2023-11-24 21:54:39,654 INFO L125 PetriNetUnfolderBase]: For 1823/1827 co-relation queries the response was YES. [2023-11-24 21:54:39,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23406 conditions, 10594 events. 7556/10594 cut-off events. For 1823/1827 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 56851 event pairs, 2786 based on Foata normal form. 0/9996 useless extension candidates. Maximal degree in co-relation 23391. Up to 5136 conditions per place. [2023-11-24 21:54:39,744 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 90 selfloop transitions, 10 changer transitions 0/115 dead transitions. [2023-11-24 21:54:39,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 115 transitions, 528 flow [2023-11-24 21:54:39,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:54:39,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:54:39,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2023-11-24 21:54:39,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7739130434782608 [2023-11-24 21:54:39,746 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 267 transitions. [2023-11-24 21:54:39,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 267 transitions. [2023-11-24 21:54:39,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:39,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 267 transitions. [2023-11-24 21:54:39,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:39,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 21:54:39,750 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 21:54:39,750 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 141 flow. Second operand 5 states and 267 transitions. [2023-11-24 21:54:39,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 115 transitions, 528 flow [2023-11-24 21:54:39,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 115 transitions, 513 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:39,757 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 199 flow [2023-11-24 21:54:39,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-11-24 21:54:39,760 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -9 predicate places. [2023-11-24 21:54:39,760 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 199 flow [2023-11-24 21:54:39,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:39,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:39,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:39,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:54:39,761 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:39,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:39,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1506353107, now seen corresponding path program 2 times [2023-11-24 21:54:39,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:39,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109534759] [2023-11-24 21:54:39,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:39,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:39,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:39,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109534759] [2023-11-24 21:54:39,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109534759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:54:39,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831815347] [2023-11-24 21:54:39,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:54:39,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:39,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:54:39,978 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:54:39,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:54:40,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:54:40,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:54:40,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:54:40,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:54:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:40,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:54:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:40,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831815347] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:54:40,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:54:40,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2023-11-24 21:54:40,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002306199] [2023-11-24 21:54:40,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:54:40,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:54:40,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:40,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:54:40,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:54:40,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 69 [2023-11-24 21:54:40,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 199 flow. Second operand has 9 states, 9 states have (on average 38.77777777777778) internal successors, (349), 9 states have internal predecessors, (349), 0 states have call successors, (0), 0 states 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 21:54:40,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:40,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 69 [2023-11-24 21:54:40,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:42,211 INFO L124 PetriNetUnfolderBase]: 13211/17707 cut-off events. [2023-11-24 21:54:42,211 INFO L125 PetriNetUnfolderBase]: For 6444/6448 co-relation queries the response was YES. [2023-11-24 21:54:42,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45385 conditions, 17707 events. 13211/17707 cut-off events. For 6444/6448 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 94248 event pairs, 1402 based on Foata normal form. 280/17917 useless extension candidates. Maximal degree in co-relation 45367. Up to 3827 conditions per place. [2023-11-24 21:54:42,561 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 234 selfloop transitions, 36 changer transitions 0/284 dead transitions. [2023-11-24 21:54:42,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 284 transitions, 1401 flow [2023-11-24 21:54:42,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:54:42,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-24 21:54:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 732 transitions. [2023-11-24 21:54:42,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7577639751552795 [2023-11-24 21:54:42,566 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 732 transitions. [2023-11-24 21:54:42,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 732 transitions. [2023-11-24 21:54:42,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:42,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 732 transitions. [2023-11-24 21:54:42,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 52.285714285714285) internal successors, (732), 14 states have internal predecessors, (732), 0 states have call successors, (0), 0 states 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 21:54:42,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 69.0) internal successors, (1035), 15 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states 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 21:54:42,573 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 69.0) internal successors, (1035), 15 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states 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 21:54:42,574 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 199 flow. Second operand 14 states and 732 transitions. [2023-11-24 21:54:42,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 284 transitions, 1401 flow [2023-11-24 21:54:42,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 284 transitions, 1401 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:54:42,594 INFO L231 Difference]: Finished difference. Result has 83 places, 87 transitions, 435 flow [2023-11-24 21:54:42,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=435, PETRI_PLACES=83, PETRI_TRANSITIONS=87} [2023-11-24 21:54:42,595 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 10 predicate places. [2023-11-24 21:54:42,596 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 87 transitions, 435 flow [2023-11-24 21:54:42,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 38.77777777777778) internal successors, (349), 9 states have internal predecessors, (349), 0 states have call successors, (0), 0 states 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 21:54:42,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:42,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:42,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 21:54:42,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:42,804 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:42,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:42,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1341171818, now seen corresponding path program 1 times [2023-11-24 21:54:42,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:42,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834173414] [2023-11-24 21:54:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:42,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:42,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:42,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834173414] [2023-11-24 21:54:42,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834173414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:42,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:42,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:54:42,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402430936] [2023-11-24 21:54:42,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:42,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:42,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:42,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:42,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:42,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 69 [2023-11-24 21:54:42,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 87 transitions, 435 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 21:54:42,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:42,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 69 [2023-11-24 21:54:42,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:44,170 INFO L124 PetriNetUnfolderBase]: 8404/12056 cut-off events. [2023-11-24 21:54:44,170 INFO L125 PetriNetUnfolderBase]: For 16294/16409 co-relation queries the response was YES. [2023-11-24 21:54:44,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36125 conditions, 12056 events. 8404/12056 cut-off events. For 16294/16409 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 67754 event pairs, 2780 based on Foata normal form. 439/12275 useless extension candidates. Maximal degree in co-relation 36100. Up to 6656 conditions per place. [2023-11-24 21:54:44,332 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 84 selfloop transitions, 3 changer transitions 0/112 dead transitions. [2023-11-24 21:54:44,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 112 transitions, 712 flow [2023-11-24 21:54:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:44,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:44,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2023-11-24 21:54:44,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8019323671497585 [2023-11-24 21:54:44,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 166 transitions. [2023-11-24 21:54:44,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 166 transitions. [2023-11-24 21:54:44,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:44,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 166 transitions. [2023-11-24 21:54:44,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 21:54:44,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:44,337 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:44,337 INFO L175 Difference]: Start difference. First operand has 83 places, 87 transitions, 435 flow. Second operand 3 states and 166 transitions. [2023-11-24 21:54:44,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 112 transitions, 712 flow [2023-11-24 21:54:44,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 112 transitions, 680 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:44,526 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 419 flow [2023-11-24 21:54:44,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=419, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2023-11-24 21:54:44,528 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 12 predicate places. [2023-11-24 21:54:44,528 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 419 flow [2023-11-24 21:54:44,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 21:54:44,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:44,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:44,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:54:44,529 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:44,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:44,530 INFO L85 PathProgramCache]: Analyzing trace with hash 823546785, now seen corresponding path program 1 times [2023-11-24 21:54:44,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:44,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876996869] [2023-11-24 21:54:44,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:44,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:44,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:44,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876996869] [2023-11-24 21:54:44,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876996869] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:44,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:44,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:54:44,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652215161] [2023-11-24 21:54:44,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:44,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:54:44,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:44,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:54:44,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:54:44,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 69 [2023-11-24 21:54:44,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 419 flow. Second operand has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:44,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:44,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 69 [2023-11-24 21:54:44,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:46,216 INFO L124 PetriNetUnfolderBase]: 9761/13695 cut-off events. [2023-11-24 21:54:46,217 INFO L125 PetriNetUnfolderBase]: For 15740/15744 co-relation queries the response was YES. [2023-11-24 21:54:46,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40879 conditions, 13695 events. 9761/13695 cut-off events. For 15740/15744 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 76865 event pairs, 4658 based on Foata normal form. 66/13639 useless extension candidates. Maximal degree in co-relation 40852. Up to 6148 conditions per place. [2023-11-24 21:54:46,349 INFO L140 encePairwiseOnDemand]: 63/69 looper letters, 112 selfloop transitions, 15 changer transitions 0/144 dead transitions. [2023-11-24 21:54:46,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 144 transitions, 850 flow [2023-11-24 21:54:46,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:54:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:54:46,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 270 transitions. [2023-11-24 21:54:46,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.782608695652174 [2023-11-24 21:54:46,351 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 270 transitions. [2023-11-24 21:54:46,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 270 transitions. [2023-11-24 21:54:46,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:46,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 270 transitions. [2023-11-24 21:54:46,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 54.0) internal successors, (270), 5 states have internal predecessors, (270), 0 states have call successors, (0), 0 states 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 21:54:46,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 21:54:46,354 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 21:54:46,355 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 419 flow. Second operand 5 states and 270 transitions. [2023-11-24 21:54:46,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 144 transitions, 850 flow [2023-11-24 21:54:46,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 144 transitions, 847 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:46,454 INFO L231 Difference]: Finished difference. Result has 90 places, 89 transitions, 473 flow [2023-11-24 21:54:46,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=473, PETRI_PLACES=90, PETRI_TRANSITIONS=89} [2023-11-24 21:54:46,455 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 17 predicate places. [2023-11-24 21:54:46,456 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 473 flow [2023-11-24 21:54:46,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:46,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:46,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:46,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:54:46,457 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:46,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:46,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1350728134, now seen corresponding path program 1 times [2023-11-24 21:54:46,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:46,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084643195] [2023-11-24 21:54:46,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:46,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:46,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:46,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084643195] [2023-11-24 21:54:46,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084643195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:46,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:46,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:54:46,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628663373] [2023-11-24 21:54:46,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:46,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:46,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:46,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:46,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:46,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 69 [2023-11-24 21:54:46,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 473 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 21:54:46,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:46,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 69 [2023-11-24 21:54:46,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:48,020 INFO L124 PetriNetUnfolderBase]: 8106/11739 cut-off events. [2023-11-24 21:54:48,020 INFO L125 PetriNetUnfolderBase]: For 21908/22048 co-relation queries the response was YES. [2023-11-24 21:54:48,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37118 conditions, 11739 events. 8106/11739 cut-off events. For 21908/22048 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 67210 event pairs, 2537 based on Foata normal form. 303/11858 useless extension candidates. Maximal degree in co-relation 37089. Up to 6103 conditions per place. [2023-11-24 21:54:48,110 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 87 selfloop transitions, 3 changer transitions 3/118 dead transitions. [2023-11-24 21:54:48,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 824 flow [2023-11-24 21:54:48,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:48,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:54:48,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-24 21:54:48,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.782608695652174 [2023-11-24 21:54:48,112 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-24 21:54:48,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-24 21:54:48,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:48,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-24 21:54:48,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states 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 21:54:48,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:48,115 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:54:48,115 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 473 flow. Second operand 3 states and 162 transitions. [2023-11-24 21:54:48,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 824 flow [2023-11-24 21:54:48,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 118 transitions, 782 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-24 21:54:48,285 INFO L231 Difference]: Finished difference. Result has 91 places, 86 transitions, 435 flow [2023-11-24 21:54:48,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=435, PETRI_PLACES=91, PETRI_TRANSITIONS=86} [2023-11-24 21:54:48,287 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 18 predicate places. [2023-11-24 21:54:48,287 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 86 transitions, 435 flow [2023-11-24 21:54:48,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 21:54:48,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:48,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:48,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:54:48,288 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:48,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:48,289 INFO L85 PathProgramCache]: Analyzing trace with hash 715424477, now seen corresponding path program 2 times [2023-11-24 21:54:48,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:48,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27498481] [2023-11-24 21:54:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:48,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:48,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:48,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27498481] [2023-11-24 21:54:48,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27498481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:48,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:48,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:54:48,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633135607] [2023-11-24 21:54:48,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:48,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:54:48,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:48,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:54:48,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:54:48,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 69 [2023-11-24 21:54:48,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 86 transitions, 435 flow. Second operand has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:48,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:48,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 69 [2023-11-24 21:54:48,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:50,332 INFO L124 PetriNetUnfolderBase]: 10737/15312 cut-off events. [2023-11-24 21:54:50,333 INFO L125 PetriNetUnfolderBase]: For 22227/22259 co-relation queries the response was YES. [2023-11-24 21:54:50,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47457 conditions, 15312 events. 10737/15312 cut-off events. For 22227/22259 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 88860 event pairs, 4749 based on Foata normal form. 36/15240 useless extension candidates. Maximal degree in co-relation 47426. Up to 7955 conditions per place. [2023-11-24 21:54:50,511 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 111 selfloop transitions, 24 changer transitions 2/154 dead transitions. [2023-11-24 21:54:50,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 154 transitions, 1015 flow [2023-11-24 21:54:50,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:54:50,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:54:50,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 265 transitions. [2023-11-24 21:54:50,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7681159420289855 [2023-11-24 21:54:50,517 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 265 transitions. [2023-11-24 21:54:50,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 265 transitions. [2023-11-24 21:54:50,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:50,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 265 transitions. [2023-11-24 21:54:50,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states 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 21:54:50,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 21:54:50,526 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 21:54:50,526 INFO L175 Difference]: Start difference. First operand has 91 places, 86 transitions, 435 flow. Second operand 5 states and 265 transitions. [2023-11-24 21:54:50,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 154 transitions, 1015 flow [2023-11-24 21:54:50,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 154 transitions, 997 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-24 21:54:50,666 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 614 flow [2023-11-24 21:54:50,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=614, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2023-11-24 21:54:50,668 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 22 predicate places. [2023-11-24 21:54:50,668 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 614 flow [2023-11-24 21:54:50,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:50,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:50,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:50,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:54:50,669 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:50,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:50,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1821251911, now seen corresponding path program 3 times [2023-11-24 21:54:50,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:50,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991187465] [2023-11-24 21:54:50,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:50,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:50,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:50,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991187465] [2023-11-24 21:54:50,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991187465] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:50,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:50,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:54:50,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830333371] [2023-11-24 21:54:50,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:50,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:54:50,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:50,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:54:50,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:54:50,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 69 [2023-11-24 21:54:50,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 614 flow. Second operand has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 6 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:50,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:50,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 69 [2023-11-24 21:54:50,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:53,052 INFO L124 PetriNetUnfolderBase]: 12053/16974 cut-off events. [2023-11-24 21:54:53,052 INFO L125 PetriNetUnfolderBase]: For 30335/30363 co-relation queries the response was YES. [2023-11-24 21:54:53,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56411 conditions, 16974 events. 12053/16974 cut-off events. For 30335/30363 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 97651 event pairs, 1511 based on Foata normal form. 182/17072 useless extension candidates. Maximal degree in co-relation 56378. Up to 5754 conditions per place. [2023-11-24 21:54:53,225 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 144 selfloop transitions, 35 changer transitions 1/197 dead transitions. [2023-11-24 21:54:53,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 197 transitions, 1402 flow [2023-11-24 21:54:53,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:54:53,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-24 21:54:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 371 transitions. [2023-11-24 21:54:53,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7681159420289855 [2023-11-24 21:54:53,228 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 371 transitions. [2023-11-24 21:54:53,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 371 transitions. [2023-11-24 21:54:53,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:53,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 371 transitions. [2023-11-24 21:54:53,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 53.0) internal successors, (371), 7 states have internal predecessors, (371), 0 states have call successors, (0), 0 states 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 21:54:53,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 69.0) internal successors, (552), 8 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:53,232 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 69.0) internal successors, (552), 8 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:53,233 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 614 flow. Second operand 7 states and 371 transitions. [2023-11-24 21:54:53,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 197 transitions, 1402 flow [2023-11-24 21:54:53,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 197 transitions, 1374 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:53,565 INFO L231 Difference]: Finished difference. Result has 104 places, 110 transitions, 807 flow [2023-11-24 21:54:53,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=807, PETRI_PLACES=104, PETRI_TRANSITIONS=110} [2023-11-24 21:54:53,566 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 31 predicate places. [2023-11-24 21:54:53,566 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 110 transitions, 807 flow [2023-11-24 21:54:53,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 6 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:53,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:53,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:53,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:54:53,567 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:53,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:53,567 INFO L85 PathProgramCache]: Analyzing trace with hash 954683143, now seen corresponding path program 3 times [2023-11-24 21:54:53,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:53,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006643032] [2023-11-24 21:54:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:53,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:53,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:53,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006643032] [2023-11-24 21:54:53,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006643032] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:53,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:53,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:54:53,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062828580] [2023-11-24 21:54:53,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:53,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:54:53,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:53,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:54:53,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:54:53,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 69 [2023-11-24 21:54:53,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 807 flow. Second operand has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:53,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:53,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 69 [2023-11-24 21:54:53,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:56,263 INFO L124 PetriNetUnfolderBase]: 13434/19126 cut-off events. [2023-11-24 21:54:56,263 INFO L125 PetriNetUnfolderBase]: For 55683/55827 co-relation queries the response was YES. [2023-11-24 21:54:56,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66141 conditions, 19126 events. 13434/19126 cut-off events. For 55683/55827 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 113884 event pairs, 5891 based on Foata normal form. 94/18955 useless extension candidates. Maximal degree in co-relation 66104. Up to 9125 conditions per place. [2023-11-24 21:54:56,411 INFO L140 encePairwiseOnDemand]: 63/69 looper letters, 105 selfloop transitions, 21 changer transitions 10/163 dead transitions. [2023-11-24 21:54:56,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 163 transitions, 1311 flow [2023-11-24 21:54:56,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:54:56,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:54:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 260 transitions. [2023-11-24 21:54:56,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7536231884057971 [2023-11-24 21:54:56,413 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 260 transitions. [2023-11-24 21:54:56,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 260 transitions. [2023-11-24 21:54:56,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:56,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 260 transitions. [2023-11-24 21:54:56,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 52.0) internal successors, (260), 5 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 21:54:56,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 21:54:56,417 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 21:54:56,417 INFO L175 Difference]: Start difference. First operand has 104 places, 110 transitions, 807 flow. Second operand 5 states and 260 transitions. [2023-11-24 21:54:56,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 163 transitions, 1311 flow [2023-11-24 21:54:56,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 163 transitions, 1303 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:54:56,580 INFO L231 Difference]: Finished difference. Result has 109 places, 110 transitions, 850 flow [2023-11-24 21:54:56,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=850, PETRI_PLACES=109, PETRI_TRANSITIONS=110} [2023-11-24 21:54:56,581 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 36 predicate places. [2023-11-24 21:54:56,581 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 110 transitions, 850 flow [2023-11-24 21:54:56,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:56,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:56,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:56,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:54:56,582 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:56,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:56,583 INFO L85 PathProgramCache]: Analyzing trace with hash -299628431, now seen corresponding path program 4 times [2023-11-24 21:54:56,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:56,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706710826] [2023-11-24 21:54:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:56,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:56,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:56,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706710826] [2023-11-24 21:54:56,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706710826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:56,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:56,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:54:56,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175179660] [2023-11-24 21:54:56,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:56,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:54:56,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:56,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:54:56,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:54:56,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 69 [2023-11-24 21:54:56,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 110 transitions, 850 flow. Second operand has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 6 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:56,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:56,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 69 [2023-11-24 21:54:56,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:59,386 INFO L124 PetriNetUnfolderBase]: 14375/19838 cut-off events. [2023-11-24 21:54:59,386 INFO L125 PetriNetUnfolderBase]: For 61176/61194 co-relation queries the response was YES. [2023-11-24 21:54:59,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70786 conditions, 19838 events. 14375/19838 cut-off events. For 61176/61194 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 110172 event pairs, 6212 based on Foata normal form. 230/19915 useless extension candidates. Maximal degree in co-relation 70747. Up to 11469 conditions per place. [2023-11-24 21:54:59,539 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 131 selfloop transitions, 28 changer transitions 1/174 dead transitions. [2023-11-24 21:54:59,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 174 transitions, 1413 flow [2023-11-24 21:54:59,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:54:59,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:54:59,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 316 transitions. [2023-11-24 21:54:59,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7632850241545893 [2023-11-24 21:54:59,542 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 316 transitions. [2023-11-24 21:54:59,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 316 transitions. [2023-11-24 21:54:59,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:59,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 316 transitions. [2023-11-24 21:54:59,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 21:54:59,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states 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 21:54:59,546 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states 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 21:54:59,546 INFO L175 Difference]: Start difference. First operand has 109 places, 110 transitions, 850 flow. Second operand 6 states and 316 transitions. [2023-11-24 21:54:59,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 174 transitions, 1413 flow [2023-11-24 21:54:59,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 174 transitions, 1363 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-24 21:54:59,891 INFO L231 Difference]: Finished difference. Result has 112 places, 111 transitions, 879 flow [2023-11-24 21:54:59,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=879, PETRI_PLACES=112, PETRI_TRANSITIONS=111} [2023-11-24 21:54:59,892 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 39 predicate places. [2023-11-24 21:54:59,892 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 111 transitions, 879 flow [2023-11-24 21:54:59,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 6 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:59,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:59,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:59,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 21:54:59,892 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:54:59,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:59,893 INFO L85 PathProgramCache]: Analyzing trace with hash 956977287, now seen corresponding path program 4 times [2023-11-24 21:54:59,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:59,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104268037] [2023-11-24 21:54:59,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:59,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:00,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:00,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104268037] [2023-11-24 21:55:00,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104268037] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:55:00,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645943966] [2023-11-24 21:55:00,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:55:00,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:55:00,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:55:00,023 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:55:00,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:55:00,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:55:00,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:55:00,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:55:00,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:00,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:55:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:00,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645943966] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:55:00,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:55:00,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-11-24 21:55:00,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809655826] [2023-11-24 21:55:00,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:55:00,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:55:00,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:00,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:55:00,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:55:00,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 69 [2023-11-24 21:55:00,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 111 transitions, 879 flow. Second operand has 11 states, 11 states have (on average 39.45454545454545) internal successors, (434), 11 states have internal predecessors, (434), 0 states have call successors, (0), 0 states 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 21:55:00,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:00,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 69 [2023-11-24 21:55:00,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:03,807 INFO L124 PetriNetUnfolderBase]: 18317/24908 cut-off events. [2023-11-24 21:55:03,807 INFO L125 PetriNetUnfolderBase]: For 62979/63011 co-relation queries the response was YES. [2023-11-24 21:55:03,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89194 conditions, 24908 events. 18317/24908 cut-off events. For 62979/63011 co-relation queries the response was YES. Maximal size of possible extension queue 984. Compared 139067 event pairs, 1345 based on Foata normal form. 145/24982 useless extension candidates. Maximal degree in co-relation 89154. Up to 4569 conditions per place. [2023-11-24 21:55:04,045 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 231 selfloop transitions, 72 changer transitions 0/317 dead transitions. [2023-11-24 21:55:04,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 317 transitions, 2273 flow [2023-11-24 21:55:04,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 21:55:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-24 21:55:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 777 transitions. [2023-11-24 21:55:04,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7507246376811594 [2023-11-24 21:55:04,049 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 777 transitions. [2023-11-24 21:55:04,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 777 transitions. [2023-11-24 21:55:04,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:04,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 777 transitions. [2023-11-24 21:55:04,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 51.8) internal successors, (777), 15 states have internal predecessors, (777), 0 states have call successors, (0), 0 states 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 21:55:04,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 69.0) internal successors, (1104), 16 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states 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 21:55:04,057 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 69.0) internal successors, (1104), 16 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states 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 21:55:04,057 INFO L175 Difference]: Start difference. First operand has 112 places, 111 transitions, 879 flow. Second operand 15 states and 777 transitions. [2023-11-24 21:55:04,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 317 transitions, 2273 flow [2023-11-24 21:55:04,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 317 transitions, 2211 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-11-24 21:55:04,589 INFO L231 Difference]: Finished difference. Result has 127 places, 130 transitions, 1216 flow [2023-11-24 21:55:04,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1216, PETRI_PLACES=127, PETRI_TRANSITIONS=130} [2023-11-24 21:55:04,593 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 54 predicate places. [2023-11-24 21:55:04,593 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 130 transitions, 1216 flow [2023-11-24 21:55:04,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 39.45454545454545) internal successors, (434), 11 states have internal predecessors, (434), 0 states have call successors, (0), 0 states 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 21:55:04,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:04,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:04,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:55:04,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa71d15-7648-4ed9-82a2-a965054b4fec/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:55:04,803 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:55:04,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:04,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1213783459, now seen corresponding path program 5 times [2023-11-24 21:55:04,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:04,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537193316] [2023-11-24 21:55:04,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:04,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:04,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:04,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537193316] [2023-11-24 21:55:04,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537193316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:04,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:04,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:55:04,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105850361] [2023-11-24 21:55:04,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:04,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:55:04,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:04,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:55:04,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:55:04,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 69 [2023-11-24 21:55:04,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 130 transitions, 1216 flow. Second operand has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:04,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:04,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 69 [2023-11-24 21:55:04,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:07,962 INFO L124 PetriNetUnfolderBase]: 15910/22426 cut-off events. [2023-11-24 21:55:07,962 INFO L125 PetriNetUnfolderBase]: For 87383/87401 co-relation queries the response was YES. [2023-11-24 21:55:08,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85152 conditions, 22426 events. 15910/22426 cut-off events. For 87383/87401 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 133708 event pairs, 7391 based on Foata normal form. 36/22317 useless extension candidates. Maximal degree in co-relation 85108. Up to 14243 conditions per place. [2023-11-24 21:55:08,504 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 117 selfloop transitions, 24 changer transitions 11/174 dead transitions. [2023-11-24 21:55:08,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 174 transitions, 1680 flow [2023-11-24 21:55:08,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:55:08,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:55:08,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 262 transitions. [2023-11-24 21:55:08,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7594202898550725 [2023-11-24 21:55:08,506 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 262 transitions. [2023-11-24 21:55:08,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 262 transitions. [2023-11-24 21:55:08,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:08,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 262 transitions. [2023-11-24 21:55:08,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 52.4) internal successors, (262), 5 states have internal predecessors, (262), 0 states have call successors, (0), 0 states 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 21:55:08,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 21:55:08,509 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 21:55:08,509 INFO L175 Difference]: Start difference. First operand has 127 places, 130 transitions, 1216 flow. Second operand 5 states and 262 transitions. [2023-11-24 21:55:08,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 174 transitions, 1680 flow [2023-11-24 21:55:09,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 174 transitions, 1634 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-11-24 21:55:09,329 INFO L231 Difference]: Finished difference. Result has 129 places, 129 transitions, 1209 flow [2023-11-24 21:55:09,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1209, PETRI_PLACES=129, PETRI_TRANSITIONS=129} [2023-11-24 21:55:09,330 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 56 predicate places. [2023-11-24 21:55:09,330 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 129 transitions, 1209 flow [2023-11-24 21:55:09,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:09,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:09,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:09,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-24 21:55:09,331 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:55:09,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:09,332 INFO L85 PathProgramCache]: Analyzing trace with hash 988336297, now seen corresponding path program 6 times [2023-11-24 21:55:09,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:09,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390716130] [2023-11-24 21:55:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:09,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:09,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:09,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390716130] [2023-11-24 21:55:09,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390716130] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:09,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:09,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:55:09,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379630354] [2023-11-24 21:55:09,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:09,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:55:09,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:09,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:55:09,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:55:09,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 69 [2023-11-24 21:55:09,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 129 transitions, 1209 flow. Second operand has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 6 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:09,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:09,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 69 [2023-11-24 21:55:09,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:12,612 INFO L124 PetriNetUnfolderBase]: 19028/26201 cut-off events. [2023-11-24 21:55:12,612 INFO L125 PetriNetUnfolderBase]: For 109643/109661 co-relation queries the response was YES. [2023-11-24 21:55:12,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100429 conditions, 26201 events. 19028/26201 cut-off events. For 109643/109661 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 149085 event pairs, 7568 based on Foata normal form. 230/26373 useless extension candidates. Maximal degree in co-relation 100385. Up to 10493 conditions per place. [2023-11-24 21:55:12,833 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 147 selfloop transitions, 37 changer transitions 1/199 dead transitions. [2023-11-24 21:55:12,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 199 transitions, 1901 flow [2023-11-24 21:55:12,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:55:12,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:55:12,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 316 transitions. [2023-11-24 21:55:12,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7632850241545893 [2023-11-24 21:55:12,835 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 316 transitions. [2023-11-24 21:55:12,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 316 transitions. [2023-11-24 21:55:12,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:12,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 316 transitions. [2023-11-24 21:55:12,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 21:55:12,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states 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 21:55:12,839 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states 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 21:55:12,839 INFO L175 Difference]: Start difference. First operand has 129 places, 129 transitions, 1209 flow. Second operand 6 states and 316 transitions. [2023-11-24 21:55:12,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 199 transitions, 1901 flow [2023-11-24 21:55:14,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 199 transitions, 1841 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-24 21:55:14,049 INFO L231 Difference]: Finished difference. Result has 130 places, 131 transitions, 1264 flow [2023-11-24 21:55:14,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1264, PETRI_PLACES=130, PETRI_TRANSITIONS=131} [2023-11-24 21:55:14,050 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 57 predicate places. [2023-11-24 21:55:14,050 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 131 transitions, 1264 flow [2023-11-24 21:55:14,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 6 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:14,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:14,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:14,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-24 21:55:14,050 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:55:14,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:14,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1399017311, now seen corresponding path program 5 times [2023-11-24 21:55:14,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:14,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973727054] [2023-11-24 21:55:14,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:14,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:14,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:14,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973727054] [2023-11-24 21:55:14,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973727054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:14,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:14,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:55:14,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831754783] [2023-11-24 21:55:14,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:14,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:55:14,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:14,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:55:14,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:55:14,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 69 [2023-11-24 21:55:14,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 131 transitions, 1264 flow. Second operand has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:14,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:14,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 69 [2023-11-24 21:55:14,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:17,219 INFO L124 PetriNetUnfolderBase]: 17303/24285 cut-off events. [2023-11-24 21:55:17,219 INFO L125 PetriNetUnfolderBase]: For 114566/114819 co-relation queries the response was YES. [2023-11-24 21:55:17,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92813 conditions, 24285 events. 17303/24285 cut-off events. For 114566/114819 co-relation queries the response was YES. Maximal size of possible extension queue 1102. Compared 144808 event pairs, 7492 based on Foata normal form. 111/24185 useless extension candidates. Maximal degree in co-relation 92768. Up to 11893 conditions per place. [2023-11-24 21:55:17,464 INFO L140 encePairwiseOnDemand]: 63/69 looper letters, 105 selfloop transitions, 29 changer transitions 8/175 dead transitions. [2023-11-24 21:55:17,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 175 transitions, 1722 flow [2023-11-24 21:55:17,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:55:17,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:55:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 257 transitions. [2023-11-24 21:55:17,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.744927536231884 [2023-11-24 21:55:17,466 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 257 transitions. [2023-11-24 21:55:17,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 257 transitions. [2023-11-24 21:55:17,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:17,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 257 transitions. [2023-11-24 21:55:17,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 51.4) internal successors, (257), 5 states have internal predecessors, (257), 0 states have call successors, (0), 0 states 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 21:55:17,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 21:55:17,470 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 21:55:17,470 INFO L175 Difference]: Start difference. First operand has 130 places, 131 transitions, 1264 flow. Second operand 5 states and 257 transitions. [2023-11-24 21:55:17,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 175 transitions, 1722 flow [2023-11-24 21:55:18,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 175 transitions, 1657 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-24 21:55:18,176 INFO L231 Difference]: Finished difference. Result has 130 places, 130 transitions, 1249 flow [2023-11-24 21:55:18,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1249, PETRI_PLACES=130, PETRI_TRANSITIONS=130} [2023-11-24 21:55:18,180 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 57 predicate places. [2023-11-24 21:55:18,180 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 130 transitions, 1249 flow [2023-11-24 21:55:18,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:18,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:18,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:18,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-24 21:55:18,182 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:55:18,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:18,182 INFO L85 PathProgramCache]: Analyzing trace with hash -376204533, now seen corresponding path program 6 times [2023-11-24 21:55:18,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:18,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420467718] [2023-11-24 21:55:18,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:18,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:18,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:18,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420467718] [2023-11-24 21:55:18,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420467718] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:18,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:18,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:55:18,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342684576] [2023-11-24 21:55:18,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:18,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:55:18,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:18,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:55:18,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:55:18,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 69 [2023-11-24 21:55:18,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 130 transitions, 1249 flow. Second operand has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 6 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:18,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:18,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 69 [2023-11-24 21:55:18,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand