./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe020_power.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2a15e0d-4688-42ef-ba59-1780ff21b494/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2a15e0d-4688-42ef-ba59-1780ff21b494/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_d2a15e0d-4688-42ef-ba59-1780ff21b494/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2a15e0d-4688-42ef-ba59-1780ff21b494/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe020_power.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2a15e0d-4688-42ef-ba59-1780ff21b494/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_d2a15e0d-4688-42ef-ba59-1780ff21b494/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 cd91eb07499c204f7750c4a87fd11eb7780a100da5928fd001cd5e1a53feff12 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:48:43,113 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:48:43,207 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2a15e0d-4688-42ef-ba59-1780ff21b494/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:48:43,213 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:48:43,214 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:48:43,241 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:48:43,242 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:48:43,243 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:48:43,243 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:48:43,244 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:48:43,245 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:48:43,245 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:48:43,247 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:48:43,247 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:48:43,248 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:48:43,249 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:48:43,249 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:48:43,250 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:48:43,251 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:48:43,252 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:48:43,252 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:48:43,253 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:48:43,254 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:48:43,254 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:48:43,255 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:48:43,255 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:48:43,256 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:48:43,257 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:48:43,257 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:48:43,258 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:48:43,258 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:48:43,259 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:48:43,259 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:48:43,260 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:48:43,260 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:48:43,261 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:48:43,261 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:48:43,261 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:48:43,262 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:48:43,262 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:48:43,262 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:48:43,263 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_d2a15e0d-4688-42ef-ba59-1780ff21b494/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2a15e0d-4688-42ef-ba59-1780ff21b494/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd91eb07499c204f7750c4a87fd11eb7780a100da5928fd001cd5e1a53feff12 [2023-11-24 21:48:43,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:48:43,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:48:43,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:48:43,543 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:48:43,543 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:48:43,545 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2a15e0d-4688-42ef-ba59-1780ff21b494/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread-wmm/safe020_power.i [2023-11-24 21:48:46,801 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:48:47,144 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:48:47,144 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2a15e0d-4688-42ef-ba59-1780ff21b494/sv-benchmarks/c/pthread-wmm/safe020_power.i [2023-11-24 21:48:47,175 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2a15e0d-4688-42ef-ba59-1780ff21b494/bin/uautomizer-verify-NlZe1sFDwI/data/524d7ec77/41fae4749d614188805dc2656ff08642/FLAG9533e0ada [2023-11-24 21:48:47,193 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2a15e0d-4688-42ef-ba59-1780ff21b494/bin/uautomizer-verify-NlZe1sFDwI/data/524d7ec77/41fae4749d614188805dc2656ff08642 [2023-11-24 21:48:47,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:48:47,207 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:48:47,211 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:48:47,211 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:48:47,217 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:48:47,217 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:48:47" (1/1) ... [2023-11-24 21:48:47,219 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e78217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:47, skipping insertion in model container [2023-11-24 21:48:47,219 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:48:47" (1/1) ... [2023-11-24 21:48:47,279 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:48:47,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:48:47,726 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:48:47,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:48:47,892 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:48:47,892 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:48:47,901 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:48:47,901 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:47 WrapperNode [2023-11-24 21:48:47,901 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:48:47,903 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:48:47,903 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:48:47,903 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:48:47,911 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:47" (1/1) ... [2023-11-24 21:48:47,950 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:47" (1/1) ... [2023-11-24 21:48:48,004 INFO L138 Inliner]: procedures = 176, calls = 78, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 182 [2023-11-24 21:48:48,004 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:48:48,005 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:48:48,005 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:48:48,005 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:48:48,018 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:47" (1/1) ... [2023-11-24 21:48:48,018 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:47" (1/1) ... [2023-11-24 21:48:48,033 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:47" (1/1) ... [2023-11-24 21:48:48,073 INFO L175 MemorySlicer]: Split 27 memory accesses to 5 slices as follows [2, 22, 1, 1, 1]. 81 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0, 0, 0]. The 10 writes are split as follows [0, 7, 1, 1, 1]. [2023-11-24 21:48:48,080 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:47" (1/1) ... [2023-11-24 21:48:48,081 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:47" (1/1) ... [2023-11-24 21:48:48,094 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:47" (1/1) ... [2023-11-24 21:48:48,114 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:47" (1/1) ... [2023-11-24 21:48:48,117 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:47" (1/1) ... [2023-11-24 21:48:48,134 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:47" (1/1) ... [2023-11-24 21:48:48,140 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:48:48,141 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:48:48,141 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:48:48,141 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:48:48,142 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:47" (1/1) ... [2023-11-24 21:48:48,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:48:48,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2a15e0d-4688-42ef-ba59-1780ff21b494/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:48,185 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2a15e0d-4688-42ef-ba59-1780ff21b494/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:48:48,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2a15e0d-4688-42ef-ba59-1780ff21b494/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:48:48,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:48:48,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:48:48,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:48:48,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:48:48,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:48:48,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:48:48,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:48:48,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:48:48,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:48:48,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:48:48,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:48:48,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:48:48,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:48:48,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:48:48,242 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-24 21:48:48,243 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-24 21:48:48,243 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-24 21:48:48,243 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-24 21:48:48,244 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-24 21:48:48,244 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-24 21:48:48,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:48:48,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:48:48,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:48:48,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:48:48,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:48:48,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:48:48,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:48:48,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:48:48,249 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 21:48:48,466 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:48:48,470 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:48:49,223 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:48:50,127 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:48:50,127 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 21:48:50,127 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:48:50 BoogieIcfgContainer [2023-11-24 21:48:50,128 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:48:50,130 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:48:50,130 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:48:50,133 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:48:50,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:48:47" (1/3) ... [2023-11-24 21:48:50,134 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762f6328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:48:50, skipping insertion in model container [2023-11-24 21:48:50,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:47" (2/3) ... [2023-11-24 21:48:50,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762f6328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:48:50, skipping insertion in model container [2023-11-24 21:48:50,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:48:50" (3/3) ... [2023-11-24 21:48:50,136 INFO L112 eAbstractionObserver]: Analyzing ICFG safe020_power.i [2023-11-24 21:48:50,156 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:48:50,157 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 51 error locations. [2023-11-24 21:48:50,157 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:48:50,377 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:48:50,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 95 transitions, 202 flow [2023-11-24 21:48:50,496 INFO L124 PetriNetUnfolderBase]: 2/92 cut-off events. [2023-11-24 21:48:50,496 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:48:50,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 92 events. 2/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 329 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2023-11-24 21:48:50,502 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 95 transitions, 202 flow [2023-11-24 21:48:50,508 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 92 transitions, 193 flow [2023-11-24 21:48:50,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:48:50,542 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;@17fb0eae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:48:50,542 INFO L358 AbstractCegarLoop]: Starting to check reachability of 91 error locations. [2023-11-24 21:48:50,546 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:48:50,546 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:48:50,546 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:48:50,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:48:50,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:48:50,548 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-24 21:48:50,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:50,555 INFO L85 PathProgramCache]: Analyzing trace with hash 30630, now seen corresponding path program 1 times [2023-11-24 21:48:50,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:50,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797513887] [2023-11-24 21:48:50,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:50,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:50,911 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 21:48:50,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:50,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797513887] [2023-11-24 21:48:50,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797513887] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:50,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:50,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:48:50,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197342229] [2023-11-24 21:48:50,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:50,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:48:50,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:50,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:48:50,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:48:51,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 95 [2023-11-24 21:48:51,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 92 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:51,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:48:51,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 95 [2023-11-24 21:48:51,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:48:57,548 INFO L124 PetriNetUnfolderBase]: 17186/26464 cut-off events. [2023-11-24 21:48:57,549 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-24 21:48:57,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50609 conditions, 26464 events. 17186/26464 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 2660. Compared 237717 event pairs, 14856 based on Foata normal form. 900/13872 useless extension candidates. Maximal degree in co-relation 50595. Up to 20808 conditions per place. [2023-11-24 21:48:57,851 INFO L140 encePairwiseOnDemand]: 66/95 looper letters, 61 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-11-24 21:48:57,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 85 transitions, 305 flow [2023-11-24 21:48:57,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:48:57,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:48:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-11-24 21:48:57,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6631578947368421 [2023-11-24 21:48:57,869 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-11-24 21:48:57,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-11-24 21:48:57,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:48:57,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-11-24 21:48:57,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:57,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:57,887 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:57,889 INFO L175 Difference]: Start difference. First operand has 100 places, 92 transitions, 193 flow. Second operand 3 states and 189 transitions. [2023-11-24 21:48:57,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 85 transitions, 305 flow [2023-11-24 21:48:57,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 85 transitions, 302 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:48:57,903 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 138 flow [2023-11-24 21:48:57,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2023-11-24 21:48:57,911 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -27 predicate places. [2023-11-24 21:48:57,911 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 138 flow [2023-11-24 21:48:57,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:57,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:48:57,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:48:57,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:48:57,913 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-24 21:48:57,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:57,914 INFO L85 PathProgramCache]: Analyzing trace with hash 30631, now seen corresponding path program 1 times [2023-11-24 21:48:57,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:57,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318324035] [2023-11-24 21:48:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:57,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:58,143 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 21:48:58,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:58,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318324035] [2023-11-24 21:48:58,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318324035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:58,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:58,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:48:58,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229919643] [2023-11-24 21:48:58,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:58,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:48:58,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:58,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:48:58,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:48:58,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 95 [2023-11-24 21:48:58,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:58,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:48:58,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 95 [2023-11-24 21:48:58,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:03,504 INFO L124 PetriNetUnfolderBase]: 17186/26463 cut-off events. [2023-11-24 21:49:03,504 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2023-11-24 21:49:03,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51056 conditions, 26463 events. 17186/26463 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 2660. Compared 238048 event pairs, 14856 based on Foata normal form. 1/12972 useless extension candidates. Maximal degree in co-relation 51045. Up to 20807 conditions per place. [2023-11-24 21:49:03,729 INFO L140 encePairwiseOnDemand]: 92/95 looper letters, 60 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-11-24 21:49:03,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 84 transitions, 302 flow [2023-11-24 21:49:03,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:03,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:49:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2023-11-24 21:49:03,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49473684210526314 [2023-11-24 21:49:03,741 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 141 transitions. [2023-11-24 21:49:03,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 141 transitions. [2023-11-24 21:49:03,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:03,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 141 transitions. [2023-11-24 21:49:03,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:03,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:03,749 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:03,750 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 138 flow. Second operand 3 states and 141 transitions. [2023-11-24 21:49:03,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 84 transitions, 302 flow [2023-11-24 21:49:03,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 84 transitions, 298 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:49:03,887 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 136 flow [2023-11-24 21:49:03,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2023-11-24 21:49:03,889 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -28 predicate places. [2023-11-24 21:49:03,890 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 136 flow [2023-11-24 21:49:03,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:03,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:03,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:49:03,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:49:03,891 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-24 21:49:03,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:03,892 INFO L85 PathProgramCache]: Analyzing trace with hash 913486275, now seen corresponding path program 1 times [2023-11-24 21:49:03,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:03,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662387549] [2023-11-24 21:49:03,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:03,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:04,024 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 21:49:04,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:04,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662387549] [2023-11-24 21:49:04,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662387549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:04,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:04,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:49:04,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884612221] [2023-11-24 21:49:04,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:04,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:04,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:04,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:04,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:04,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 95 [2023-11-24 21:49:04,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:04,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:04,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 95 [2023-11-24 21:49:04,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:08,320 INFO L124 PetriNetUnfolderBase]: 17190/26370 cut-off events. [2023-11-24 21:49:08,320 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2023-11-24 21:49:08,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50972 conditions, 26370 events. 17190/26370 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 2660. Compared 235794 event pairs, 14946 based on Foata normal form. 0/12885 useless extension candidates. Maximal degree in co-relation 50961. Up to 20810 conditions per place. [2023-11-24 21:49:08,534 INFO L140 encePairwiseOnDemand]: 92/95 looper letters, 61 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-11-24 21:49:08,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 302 flow [2023-11-24 21:49:08,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:49:08,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2023-11-24 21:49:08,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48771929824561405 [2023-11-24 21:49:08,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 139 transitions. [2023-11-24 21:49:08,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 139 transitions. [2023-11-24 21:49:08,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:08,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 139 transitions. [2023-11-24 21:49:08,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:08,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:08,544 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:08,544 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 136 flow. Second operand 3 states and 139 transitions. [2023-11-24 21:49:08,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 302 flow [2023-11-24 21:49:08,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 83 transitions, 298 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:49:08,631 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 134 flow [2023-11-24 21:49:08,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2023-11-24 21:49:08,633 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -29 predicate places. [2023-11-24 21:49:08,634 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 134 flow [2023-11-24 21:49:08,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:08,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:08,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:49:08,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:49:08,635 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-24 21:49:08,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:08,636 INFO L85 PathProgramCache]: Analyzing trace with hash 913486276, now seen corresponding path program 1 times [2023-11-24 21:49:08,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:08,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453149607] [2023-11-24 21:49:08,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:08,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:08,776 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 21:49:08,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:08,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453149607] [2023-11-24 21:49:08,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453149607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:08,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:08,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:49:08,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175122793] [2023-11-24 21:49:08,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:08,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:08,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:08,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:08,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:08,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 95 [2023-11-24 21:49:08,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:08,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:08,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 95 [2023-11-24 21:49:08,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:12,937 INFO L124 PetriNetUnfolderBase]: 17186/26361 cut-off events. [2023-11-24 21:49:12,937 INFO L125 PetriNetUnfolderBase]: For 454/454 co-relation queries the response was YES. [2023-11-24 21:49:12,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50958 conditions, 26361 events. 17186/26361 cut-off events. For 454/454 co-relation queries the response was YES. Maximal size of possible extension queue 2660. Compared 235898 event pairs, 14942 based on Foata normal form. 5/12884 useless extension candidates. Maximal degree in co-relation 50948. Up to 20801 conditions per place. [2023-11-24 21:49:13,328 INFO L140 encePairwiseOnDemand]: 92/95 looper letters, 60 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-11-24 21:49:13,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 82 transitions, 298 flow [2023-11-24 21:49:13,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:49:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2023-11-24 21:49:13,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49473684210526314 [2023-11-24 21:49:13,332 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 141 transitions. [2023-11-24 21:49:13,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 141 transitions. [2023-11-24 21:49:13,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:13,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 141 transitions. [2023-11-24 21:49:13,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:13,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:13,338 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:13,339 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 134 flow. Second operand 3 states and 141 transitions. [2023-11-24 21:49:13,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 82 transitions, 298 flow [2023-11-24 21:49:13,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 82 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:49:13,413 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 132 flow [2023-11-24 21:49:13,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2023-11-24 21:49:13,416 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -30 predicate places. [2023-11-24 21:49:13,416 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 132 flow [2023-11-24 21:49:13,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:13,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:13,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:13,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:49:13,418 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-24 21:49:13,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:13,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1687285952, now seen corresponding path program 1 times [2023-11-24 21:49:13,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:13,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467056714] [2023-11-24 21:49:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:13,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:13,591 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 21:49:13,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:13,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467056714] [2023-11-24 21:49:13,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467056714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:13,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:13,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:49:13,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283735992] [2023-11-24 21:49:13,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:13,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:49:13,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:13,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:49:13,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:49:13,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 95 [2023-11-24 21:49:13,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:13,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:13,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 95 [2023-11-24 21:49:13,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:16,433 INFO L124 PetriNetUnfolderBase]: 8251/13534 cut-off events. [2023-11-24 21:49:16,434 INFO L125 PetriNetUnfolderBase]: For 199/199 co-relation queries the response was YES. [2023-11-24 21:49:16,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25866 conditions, 13534 events. 8251/13534 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 1151. Compared 117407 event pairs, 5610 based on Foata normal form. 0/8257 useless extension candidates. Maximal degree in co-relation 25855. Up to 7436 conditions per place. [2023-11-24 21:49:16,508 INFO L140 encePairwiseOnDemand]: 81/95 looper letters, 65 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2023-11-24 21:49:16,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 90 transitions, 332 flow [2023-11-24 21:49:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:49:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:49:16,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 189 transitions. [2023-11-24 21:49:16,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49736842105263157 [2023-11-24 21:49:16,510 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 189 transitions. [2023-11-24 21:49:16,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 189 transitions. [2023-11-24 21:49:16,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:16,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 189 transitions. [2023-11-24 21:49:16,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:16,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:16,514 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:16,514 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 132 flow. Second operand 4 states and 189 transitions. [2023-11-24 21:49:16,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 90 transitions, 332 flow [2023-11-24 21:49:16,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 90 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:49:16,521 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 188 flow [2023-11-24 21:49:16,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2023-11-24 21:49:16,522 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -28 predicate places. [2023-11-24 21:49:16,522 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 188 flow [2023-11-24 21:49:16,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:16,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:16,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:16,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:49:16,523 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-24 21:49:16,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:16,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1687285953, now seen corresponding path program 1 times [2023-11-24 21:49:16,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:16,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644943304] [2023-11-24 21:49:16,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:16,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:16,657 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 21:49:16,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:16,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644943304] [2023-11-24 21:49:16,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644943304] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:16,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:16,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:49:16,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917146688] [2023-11-24 21:49:16,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:16,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:49:16,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:16,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:49:16,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:49:16,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 95 [2023-11-24 21:49:16,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:16,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:16,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 95 [2023-11-24 21:49:16,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:17,456 INFO L124 PetriNetUnfolderBase]: 2340/4203 cut-off events. [2023-11-24 21:49:17,456 INFO L125 PetriNetUnfolderBase]: For 1568/1583 co-relation queries the response was YES. [2023-11-24 21:49:17,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10043 conditions, 4203 events. 2340/4203 cut-off events. For 1568/1583 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32821 event pairs, 1584 based on Foata normal form. 1016/4712 useless extension candidates. Maximal degree in co-relation 10029. Up to 1858 conditions per place. [2023-11-24 21:49:17,484 INFO L140 encePairwiseOnDemand]: 85/95 looper letters, 42 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-11-24 21:49:17,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 64 transitions, 286 flow [2023-11-24 21:49:17,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:49:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:49:17,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 162 transitions. [2023-11-24 21:49:17,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263157894736842 [2023-11-24 21:49:17,486 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 162 transitions. [2023-11-24 21:49:17,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 162 transitions. [2023-11-24 21:49:17,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:17,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 162 transitions. [2023-11-24 21:49:17,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.5) internal successors, (162), 4 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 21:49:17,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:17,490 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:17,490 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 188 flow. Second operand 4 states and 162 transitions. [2023-11-24 21:49:17,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 64 transitions, 286 flow [2023-11-24 21:49:17,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 64 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:49:17,495 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 174 flow [2023-11-24 21:49:17,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2023-11-24 21:49:17,496 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -34 predicate places. [2023-11-24 21:49:17,496 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 174 flow [2023-11-24 21:49:17,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:17,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:17,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:17,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:49:17,497 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-24 21:49:17,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:17,498 INFO L85 PathProgramCache]: Analyzing trace with hash 757821316, now seen corresponding path program 1 times [2023-11-24 21:49:17,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:17,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539914627] [2023-11-24 21:49:17,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:17,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:17,546 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 21:49:17,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:17,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539914627] [2023-11-24 21:49:17,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539914627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:17,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:17,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:49:17,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228756940] [2023-11-24 21:49:17,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:17,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:17,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:17,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:17,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:17,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 95 [2023-11-24 21:49:17,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:17,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:17,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 95 [2023-11-24 21:49:17,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:18,480 INFO L124 PetriNetUnfolderBase]: 2362/4203 cut-off events. [2023-11-24 21:49:18,480 INFO L125 PetriNetUnfolderBase]: For 1610/1633 co-relation queries the response was YES. [2023-11-24 21:49:18,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10149 conditions, 4203 events. 2362/4203 cut-off events. For 1610/1633 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32815 event pairs, 1488 based on Foata normal form. 0/3702 useless extension candidates. Maximal degree in co-relation 10134. Up to 1893 conditions per place. [2023-11-24 21:49:18,503 INFO L140 encePairwiseOnDemand]: 92/95 looper letters, 43 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-11-24 21:49:18,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 63 transitions, 288 flow [2023-11-24 21:49:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:49:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2023-11-24 21:49:18,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105263157894737 [2023-11-24 21:49:18,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 117 transitions. [2023-11-24 21:49:18,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 117 transitions. [2023-11-24 21:49:18,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:18,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 117 transitions. [2023-11-24 21:49:18,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:18,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:18,507 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:18,508 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 174 flow. Second operand 3 states and 117 transitions. [2023-11-24 21:49:18,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 63 transitions, 288 flow [2023-11-24 21:49:18,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 63 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:49:18,513 INFO L231 Difference]: Finished difference. Result has 65 places, 54 transitions, 173 flow [2023-11-24 21:49:18,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=65, PETRI_TRANSITIONS=54} [2023-11-24 21:49:18,514 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -35 predicate places. [2023-11-24 21:49:18,514 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 54 transitions, 173 flow [2023-11-24 21:49:18,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:18,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:18,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:18,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:49:18,515 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-24 21:49:18,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:18,516 INFO L85 PathProgramCache]: Analyzing trace with hash 757821317, now seen corresponding path program 1 times [2023-11-24 21:49:18,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:18,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335861238] [2023-11-24 21:49:18,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:18,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:18,592 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 21:49:18,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:18,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335861238] [2023-11-24 21:49:18,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335861238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:18,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:18,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:49:18,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690543988] [2023-11-24 21:49:18,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:18,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:18,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:18,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:18,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:18,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 95 [2023-11-24 21:49:18,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 54 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:18,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:18,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 95 [2023-11-24 21:49:18,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:19,562 INFO L124 PetriNetUnfolderBase]: 2340/4145 cut-off events. [2023-11-24 21:49:19,563 INFO L125 PetriNetUnfolderBase]: For 1610/1618 co-relation queries the response was YES. [2023-11-24 21:49:19,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10120 conditions, 4145 events. 2340/4145 cut-off events. For 1610/1618 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 32624 event pairs, 1476 based on Foata normal form. 15/3683 useless extension candidates. Maximal degree in co-relation 10106. Up to 1893 conditions per place. [2023-11-24 21:49:19,591 INFO L140 encePairwiseOnDemand]: 92/95 looper letters, 42 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-11-24 21:49:19,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 62 transitions, 285 flow [2023-11-24 21:49:19,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:19,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:49:19,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2023-11-24 21:49:19,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41754385964912283 [2023-11-24 21:49:19,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 119 transitions. [2023-11-24 21:49:19,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 119 transitions. [2023-11-24 21:49:19,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:19,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 119 transitions. [2023-11-24 21:49:19,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:19,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:19,595 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:19,595 INFO L175 Difference]: Start difference. First operand has 65 places, 54 transitions, 173 flow. Second operand 3 states and 119 transitions. [2023-11-24 21:49:19,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 62 transitions, 285 flow [2023-11-24 21:49:19,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 281 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:49:19,599 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 171 flow [2023-11-24 21:49:19,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2023-11-24 21:49:19,600 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -36 predicate places. [2023-11-24 21:49:19,600 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 171 flow [2023-11-24 21:49:19,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:19,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:19,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:19,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:49:19,605 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting P1Err0ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-24 21:49:19,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:19,605 INFO L85 PathProgramCache]: Analyzing trace with hash 757823750, now seen corresponding path program 1 times [2023-11-24 21:49:19,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:19,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575470046] [2023-11-24 21:49:19,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:19,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:19,762 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 21:49:19,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:19,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575470046] [2023-11-24 21:49:19,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575470046] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:19,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:19,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:49:19,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479198939] [2023-11-24 21:49:19,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:19,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:19,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:19,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:19,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:19,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 95 [2023-11-24 21:49:19,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:19,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:19,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 95 [2023-11-24 21:49:19,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:20,433 INFO L124 PetriNetUnfolderBase]: 1891/3330 cut-off events. [2023-11-24 21:49:20,433 INFO L125 PetriNetUnfolderBase]: For 1143/1143 co-relation queries the response was YES. [2023-11-24 21:49:20,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8343 conditions, 3330 events. 1891/3330 cut-off events. For 1143/1143 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25221 event pairs, 326 based on Foata normal form. 0/3121 useless extension candidates. Maximal degree in co-relation 8329. Up to 2502 conditions per place. [2023-11-24 21:49:20,451 INFO L140 encePairwiseOnDemand]: 92/95 looper letters, 56 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-11-24 21:49:20,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 377 flow [2023-11-24 21:49:20,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:20,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:49:20,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-11-24 21:49:20,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-11-24 21:49:20,453 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-11-24 21:49:20,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-11-24 21:49:20,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:20,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-11-24 21:49:20,455 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 21:49:20,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:20,456 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:20,456 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 171 flow. Second operand 3 states and 133 transitions. [2023-11-24 21:49:20,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 377 flow [2023-11-24 21:49:20,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 76 transitions, 369 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:49:20,459 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 169 flow [2023-11-24 21:49:20,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2023-11-24 21:49:20,461 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -37 predicate places. [2023-11-24 21:49:20,461 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 169 flow [2023-11-24 21:49:20,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:20,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:20,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:20,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:49:20,462 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-24 21:49:20,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:20,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1482134590, now seen corresponding path program 1 times [2023-11-24 21:49:20,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:20,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792991963] [2023-11-24 21:49:20,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:20,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:20,562 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 21:49:20,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:20,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792991963] [2023-11-24 21:49:20,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792991963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:20,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:20,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:49:20,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743920585] [2023-11-24 21:49:20,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:20,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:20,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:20,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:20,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:20,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 95 [2023-11-24 21:49:20,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:20,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:20,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 95 [2023-11-24 21:49:20,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:21,193 INFO L124 PetriNetUnfolderBase]: 1833/3341 cut-off events. [2023-11-24 21:49:21,194 INFO L125 PetriNetUnfolderBase]: For 1371/1377 co-relation queries the response was YES. [2023-11-24 21:49:21,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8379 conditions, 3341 events. 1833/3341 cut-off events. For 1371/1377 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 25414 event pairs, 654 based on Foata normal form. 0/3148 useless extension candidates. Maximal degree in co-relation 8364. Up to 2264 conditions per place. [2023-11-24 21:49:21,217 INFO L140 encePairwiseOnDemand]: 91/95 looper letters, 49 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-11-24 21:49:21,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 70 transitions, 339 flow [2023-11-24 21:49:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:21,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:49:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-24 21:49:21,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45263157894736844 [2023-11-24 21:49:21,219 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-24 21:49:21,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-24 21:49:21,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:21,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-24 21:49:21,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:21,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:21,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:21,222 INFO L175 Difference]: Start difference. First operand has 63 places, 52 transitions, 169 flow. Second operand 3 states and 129 transitions. [2023-11-24 21:49:21,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 70 transitions, 339 flow [2023-11-24 21:49:21,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 70 transitions, 333 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:49:21,226 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 178 flow [2023-11-24 21:49:21,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2023-11-24 21:49:21,227 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -36 predicate places. [2023-11-24 21:49:21,227 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 178 flow [2023-11-24 21:49:21,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:21,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:21,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:21,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:49:21,228 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-24 21:49:21,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:21,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1597689076, now seen corresponding path program 1 times [2023-11-24 21:49:21,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:21,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110167617] [2023-11-24 21:49:21,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:21,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:21,407 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 21:49:21,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:21,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110167617] [2023-11-24 21:49:21,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110167617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:21,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:21,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:49:21,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124766740] [2023-11-24 21:49:21,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:21,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:49:21,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:21,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:49:21,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:49:21,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 95 [2023-11-24 21:49:21,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:21,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:21,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 95 [2023-11-24 21:49:21,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:22,450 INFO L124 PetriNetUnfolderBase]: 1902/3602 cut-off events. [2023-11-24 21:49:22,450 INFO L125 PetriNetUnfolderBase]: For 1433/1439 co-relation queries the response was YES. [2023-11-24 21:49:22,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9009 conditions, 3602 events. 1902/3602 cut-off events. For 1433/1439 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 28478 event pairs, 546 based on Foata normal form. 0/3487 useless extension candidates. Maximal degree in co-relation 8993. Up to 1328 conditions per place. [2023-11-24 21:49:22,471 INFO L140 encePairwiseOnDemand]: 88/95 looper letters, 45 selfloop transitions, 8 changer transitions 0/71 dead transitions. [2023-11-24 21:49:22,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 71 transitions, 330 flow [2023-11-24 21:49:22,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:49:22,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:49:22,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 162 transitions. [2023-11-24 21:49:22,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263157894736842 [2023-11-24 21:49:22,473 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 162 transitions. [2023-11-24 21:49:22,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 162 transitions. [2023-11-24 21:49:22,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:22,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 162 transitions. [2023-11-24 21:49:22,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.5) internal successors, (162), 4 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 21:49:22,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:22,476 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:22,476 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 178 flow. Second operand 4 states and 162 transitions. [2023-11-24 21:49:22,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 71 transitions, 330 flow [2023-11-24 21:49:22,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 71 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:49:22,481 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 190 flow [2023-11-24 21:49:22,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2023-11-24 21:49:22,482 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -36 predicate places. [2023-11-24 21:49:22,483 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 190 flow [2023-11-24 21:49:22,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:22,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:22,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:22,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:49:22,484 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-24 21:49:22,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:22,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1597689075, now seen corresponding path program 1 times [2023-11-24 21:49:22,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:22,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832070005] [2023-11-24 21:49:22,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:22,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:22,781 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 21:49:22,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:22,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832070005] [2023-11-24 21:49:22,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832070005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:22,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:22,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:49:22,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21499800] [2023-11-24 21:49:22,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:22,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:49:22,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:22,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:49:22,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:49:22,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 95 [2023-11-24 21:49:22,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:22,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:22,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 95 [2023-11-24 21:49:22,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:23,643 INFO L124 PetriNetUnfolderBase]: 1827/3459 cut-off events. [2023-11-24 21:49:23,643 INFO L125 PetriNetUnfolderBase]: For 1880/1886 co-relation queries the response was YES. [2023-11-24 21:49:23,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8922 conditions, 3459 events. 1827/3459 cut-off events. For 1880/1886 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 27466 event pairs, 622 based on Foata normal form. 36/3372 useless extension candidates. Maximal degree in co-relation 8906. Up to 2313 conditions per place. [2023-11-24 21:49:23,659 INFO L140 encePairwiseOnDemand]: 92/95 looper letters, 47 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2023-11-24 21:49:23,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 68 transitions, 348 flow [2023-11-24 21:49:23,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:49:23,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:49:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2023-11-24 21:49:23,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026315789473684 [2023-11-24 21:49:23,660 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 153 transitions. [2023-11-24 21:49:23,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 153 transitions. [2023-11-24 21:49:23,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:23,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 153 transitions. [2023-11-24 21:49:23,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:23,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:23,662 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:23,662 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 190 flow. Second operand 4 states and 153 transitions. [2023-11-24 21:49:23,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 68 transitions, 348 flow [2023-11-24 21:49:23,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 68 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:49:23,665 INFO L231 Difference]: Finished difference. Result has 64 places, 51 transitions, 182 flow [2023-11-24 21:49:23,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2023-11-24 21:49:23,666 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -36 predicate places. [2023-11-24 21:49:23,666 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 182 flow [2023-11-24 21:49:23,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:23,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:23,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:23,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:49:23,667 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-24 21:49:23,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:23,668 INFO L85 PathProgramCache]: Analyzing trace with hash 2140926162, now seen corresponding path program 1 times [2023-11-24 21:49:23,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:23,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213720589] [2023-11-24 21:49:23,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:23,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:24,360 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 21:49:24,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:24,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213720589] [2023-11-24 21:49:24,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213720589] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:24,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:24,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:49:24,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827855576] [2023-11-24 21:49:24,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:24,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:49:24,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:24,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:49:24,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:49:24,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 95 [2023-11-24 21:49:24,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 182 flow. Second operand has 9 states, 9 states have (on average 23.666666666666668) internal successors, (213), 9 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:24,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:24,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 95 [2023-11-24 21:49:24,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:25,363 INFO L124 PetriNetUnfolderBase]: 1829/3413 cut-off events. [2023-11-24 21:49:25,363 INFO L125 PetriNetUnfolderBase]: For 1769/1769 co-relation queries the response was YES. [2023-11-24 21:49:25,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8835 conditions, 3413 events. 1829/3413 cut-off events. For 1769/1769 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26278 event pairs, 430 based on Foata normal form. 0/3302 useless extension candidates. Maximal degree in co-relation 8818. Up to 1844 conditions per place. [2023-11-24 21:49:25,384 INFO L140 encePairwiseOnDemand]: 89/95 looper letters, 55 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-11-24 21:49:25,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 76 transitions, 376 flow [2023-11-24 21:49:25,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:49:25,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-24 21:49:25,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2023-11-24 21:49:25,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.318796992481203 [2023-11-24 21:49:25,386 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 212 transitions. [2023-11-24 21:49:25,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 212 transitions. [2023-11-24 21:49:25,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:25,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 212 transitions. [2023-11-24 21:49:25,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 30.285714285714285) internal successors, (212), 7 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:25,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 95.0) internal successors, (760), 8 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:25,390 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 95.0) internal successors, (760), 8 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:25,390 INFO L175 Difference]: Start difference. First operand has 64 places, 51 transitions, 182 flow. Second operand 7 states and 212 transitions. [2023-11-24 21:49:25,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 76 transitions, 376 flow [2023-11-24 21:49:25,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 76 transitions, 371 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:49:25,395 INFO L231 Difference]: Finished difference. Result has 68 places, 51 transitions, 200 flow [2023-11-24 21:49:25,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=200, PETRI_PLACES=68, PETRI_TRANSITIONS=51} [2023-11-24 21:49:25,396 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -32 predicate places. [2023-11-24 21:49:25,396 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 51 transitions, 200 flow [2023-11-24 21:49:25,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.666666666666668) internal successors, (213), 9 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:25,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:25,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:25,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:49:25,397 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-24 21:49:25,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:25,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2140924476, now seen corresponding path program 1 times [2023-11-24 21:49:25,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:25,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781647575] [2023-11-24 21:49:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:25,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:25,559 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 21:49:25,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:25,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781647575] [2023-11-24 21:49:25,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781647575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:25,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:25,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:49:25,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432309653] [2023-11-24 21:49:25,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:25,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:49:25,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:25,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:49:25,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:49:25,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 95 [2023-11-24 21:49:25,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 51 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 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 21:49:25,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:25,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 95 [2023-11-24 21:49:25,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:26,612 INFO L124 PetriNetUnfolderBase]: 2952/4880 cut-off events. [2023-11-24 21:49:26,612 INFO L125 PetriNetUnfolderBase]: For 2591/2601 co-relation queries the response was YES. [2023-11-24 21:49:26,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12338 conditions, 4880 events. 2952/4880 cut-off events. For 2591/2601 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 32664 event pairs, 532 based on Foata normal form. 100/4884 useless extension candidates. Maximal degree in co-relation 12321. Up to 3621 conditions per place. [2023-11-24 21:49:26,637 INFO L140 encePairwiseOnDemand]: 89/95 looper letters, 56 selfloop transitions, 5 changer transitions 2/76 dead transitions. [2023-11-24 21:49:26,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 76 transitions, 413 flow [2023-11-24 21:49:26,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:49:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:49:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 151 transitions. [2023-11-24 21:49:26,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3973684210526316 [2023-11-24 21:49:26,639 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 151 transitions. [2023-11-24 21:49:26,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 151 transitions. [2023-11-24 21:49:26,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:26,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 151 transitions. [2023-11-24 21:49:26,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:26,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:26,642 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:26,643 INFO L175 Difference]: Start difference. First operand has 68 places, 51 transitions, 200 flow. Second operand 4 states and 151 transitions. [2023-11-24 21:49:26,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 76 transitions, 413 flow [2023-11-24 21:49:26,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 76 transitions, 399 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:49:26,647 INFO L231 Difference]: Finished difference. Result has 69 places, 53 transitions, 217 flow [2023-11-24 21:49:26,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2023-11-24 21:49:26,648 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -31 predicate places. [2023-11-24 21:49:26,649 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 217 flow [2023-11-24 21:49:26,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 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 21:49:26,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:26,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:26,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:49:26,650 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-24 21:49:26,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:26,650 INFO L85 PathProgramCache]: Analyzing trace with hash -196005731, now seen corresponding path program 1 times [2023-11-24 21:49:26,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:26,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609798280] [2023-11-24 21:49:26,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:26,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:26,931 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 21:49:26,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:26,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609798280] [2023-11-24 21:49:26,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609798280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:26,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:26,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:49:26,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975434681] [2023-11-24 21:49:26,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:26,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:49:26,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:26,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:49:26,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:49:26,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 95 [2023-11-24 21:49:26,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:26,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:26,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 95 [2023-11-24 21:49:26,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:27,681 INFO L124 PetriNetUnfolderBase]: 1352/2276 cut-off events. [2023-11-24 21:49:27,682 INFO L125 PetriNetUnfolderBase]: For 1476/1486 co-relation queries the response was YES. [2023-11-24 21:49:27,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6043 conditions, 2276 events. 1352/2276 cut-off events. For 1476/1486 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 12786 event pairs, 158 based on Foata normal form. 82/2330 useless extension candidates. Maximal degree in co-relation 6024. Up to 1213 conditions per place. [2023-11-24 21:49:27,692 INFO L140 encePairwiseOnDemand]: 89/95 looper letters, 63 selfloop transitions, 8 changer transitions 5/89 dead transitions. [2023-11-24 21:49:27,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 89 transitions, 505 flow [2023-11-24 21:49:27,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:49:27,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:49:27,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 188 transitions. [2023-11-24 21:49:27,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3957894736842105 [2023-11-24 21:49:27,695 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 188 transitions. [2023-11-24 21:49:27,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 188 transitions. [2023-11-24 21:49:27,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:27,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 188 transitions. [2023-11-24 21:49:27,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 37.6) internal successors, (188), 5 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:27,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:27,698 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:27,699 INFO L175 Difference]: Start difference. First operand has 69 places, 53 transitions, 217 flow. Second operand 5 states and 188 transitions. [2023-11-24 21:49:27,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 89 transitions, 505 flow [2023-11-24 21:49:27,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 89 transitions, 470 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-24 21:49:27,705 INFO L231 Difference]: Finished difference. Result has 71 places, 52 transitions, 215 flow [2023-11-24 21:49:27,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=215, PETRI_PLACES=71, PETRI_TRANSITIONS=52} [2023-11-24 21:49:27,706 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -29 predicate places. [2023-11-24 21:49:27,706 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 52 transitions, 215 flow [2023-11-24 21:49:27,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:27,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:27,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:27,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:49:27,707 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-24 21:49:27,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:27,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1315519639, now seen corresponding path program 1 times [2023-11-24 21:49:27,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:27,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669058578] [2023-11-24 21:49:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:27,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:28,213 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 21:49:28,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:28,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669058578] [2023-11-24 21:49:28,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669058578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:28,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:28,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:49:28,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080992818] [2023-11-24 21:49:28,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:28,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:49:28,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:28,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:49:28,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:49:28,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 95 [2023-11-24 21:49:28,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 52 transitions, 215 flow. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:28,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:28,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 95 [2023-11-24 21:49:28,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:28,680 INFO L124 PetriNetUnfolderBase]: 603/1001 cut-off events. [2023-11-24 21:49:28,680 INFO L125 PetriNetUnfolderBase]: For 1065/1075 co-relation queries the response was YES. [2023-11-24 21:49:28,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2919 conditions, 1001 events. 603/1001 cut-off events. For 1065/1075 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4548 event pairs, 81 based on Foata normal form. 40/1029 useless extension candidates. Maximal degree in co-relation 2910. Up to 308 conditions per place. [2023-11-24 21:49:28,687 INFO L140 encePairwiseOnDemand]: 89/95 looper letters, 47 selfloop transitions, 11 changer transitions 3/74 dead transitions. [2023-11-24 21:49:28,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 74 transitions, 393 flow [2023-11-24 21:49:28,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:49:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:49:28,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2023-11-24 21:49:28,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3526315789473684 [2023-11-24 21:49:28,691 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 201 transitions. [2023-11-24 21:49:28,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 201 transitions. [2023-11-24 21:49:28,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:28,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 201 transitions. [2023-11-24 21:49:28,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 33.5) internal successors, (201), 6 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:28,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 95.0) internal successors, (665), 7 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:28,695 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 95.0) internal successors, (665), 7 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:28,696 INFO L175 Difference]: Start difference. First operand has 71 places, 52 transitions, 215 flow. Second operand 6 states and 201 transitions. [2023-11-24 21:49:28,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 74 transitions, 393 flow [2023-11-24 21:49:28,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 74 transitions, 354 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-11-24 21:49:28,701 INFO L231 Difference]: Finished difference. Result has 63 places, 43 transitions, 178 flow [2023-11-24 21:49:28,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=63, PETRI_TRANSITIONS=43} [2023-11-24 21:49:28,701 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -37 predicate places. [2023-11-24 21:49:28,702 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 43 transitions, 178 flow [2023-11-24 21:49:28,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:28,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:28,702 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] [2023-11-24 21:49:28,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:49:28,703 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-24 21:49:28,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:28,704 INFO L85 PathProgramCache]: Analyzing trace with hash 636593688, now seen corresponding path program 1 times [2023-11-24 21:49:28,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:28,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599076644] [2023-11-24 21:49:28,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:28,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:29,229 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 21:49:29,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:29,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599076644] [2023-11-24 21:49:29,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599076644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:29,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:29,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:49:29,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603385684] [2023-11-24 21:49:29,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:29,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:49:29,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:29,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:49:29,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:49:29,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 95 [2023-11-24 21:49:29,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 43 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:29,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:29,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 95 [2023-11-24 21:49:29,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:29,724 INFO L124 PetriNetUnfolderBase]: 677/1287 cut-off events. [2023-11-24 21:49:29,725 INFO L125 PetriNetUnfolderBase]: For 730/758 co-relation queries the response was YES. [2023-11-24 21:49:29,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3197 conditions, 1287 events. 677/1287 cut-off events. For 730/758 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7125 event pairs, 342 based on Foata normal form. 8/1243 useless extension candidates. Maximal degree in co-relation 3189. Up to 630 conditions per place. [2023-11-24 21:49:29,734 INFO L140 encePairwiseOnDemand]: 90/95 looper letters, 26 selfloop transitions, 2 changer transitions 13/62 dead transitions. [2023-11-24 21:49:29,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 62 transitions, 312 flow [2023-11-24 21:49:29,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:49:29,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:49:29,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2023-11-24 21:49:29,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35157894736842105 [2023-11-24 21:49:29,737 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 167 transitions. [2023-11-24 21:49:29,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 167 transitions. [2023-11-24 21:49:29,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:29,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 167 transitions. [2023-11-24 21:49:29,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 33.4) internal successors, (167), 5 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:29,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:29,740 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:29,741 INFO L175 Difference]: Start difference. First operand has 63 places, 43 transitions, 178 flow. Second operand 5 states and 167 transitions. [2023-11-24 21:49:29,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 62 transitions, 312 flow [2023-11-24 21:49:29,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 62 transitions, 248 flow, removed 14 selfloop flow, removed 8 redundant places. [2023-11-24 21:49:29,753 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 134 flow [2023-11-24 21:49:29,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=134, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2023-11-24 21:49:29,754 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -42 predicate places. [2023-11-24 21:49:29,754 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 134 flow [2023-11-24 21:49:29,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:29,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:29,755 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] [2023-11-24 21:49:29,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:49:29,756 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-24 21:49:29,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:29,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1654714600, now seen corresponding path program 2 times [2023-11-24 21:49:29,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:29,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702561579] [2023-11-24 21:49:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:29,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat