./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe015_rmo.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac6c3c3d-0d6a-4eb7-8eb3-1b393dfa88c8/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac6c3c3d-0d6a-4eb7-8eb3-1b393dfa88c8/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_ac6c3c3d-0d6a-4eb7-8eb3-1b393dfa88c8/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac6c3c3d-0d6a-4eb7-8eb3-1b393dfa88c8/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe015_rmo.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac6c3c3d-0d6a-4eb7-8eb3-1b393dfa88c8/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_ac6c3c3d-0d6a-4eb7-8eb3-1b393dfa88c8/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 fa1630ab5b9ca06d45588653daa6fff0d3a2fbd0851a9f5c3999782c5c51eba5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:05:21,372 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:05:21,500 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac6c3c3d-0d6a-4eb7-8eb3-1b393dfa88c8/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 22:05:21,507 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:05:21,508 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:05:21,546 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:05:21,547 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:05:21,548 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:05:21,549 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:05:21,554 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:05:21,554 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:05:21,555 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:05:21,556 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:05:21,557 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:05:21,557 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:05:21,558 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:05:21,558 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:05:21,559 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:05:21,559 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:05:21,559 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:05:21,560 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 22:05:21,561 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 22:05:21,561 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 22:05:21,561 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:05:21,562 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 22:05:21,564 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 22:05:21,565 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:05:21,565 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:05:21,566 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:05:21,567 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:05:21,568 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:05:21,568 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:05:21,569 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:05:21,569 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:05:21,569 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:05:21,570 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:05:21,570 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:05:21,570 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:05:21,571 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:05:21,571 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:05:21,571 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:05:21,572 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_ac6c3c3d-0d6a-4eb7-8eb3-1b393dfa88c8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac6c3c3d-0d6a-4eb7-8eb3-1b393dfa88c8/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa1630ab5b9ca06d45588653daa6fff0d3a2fbd0851a9f5c3999782c5c51eba5 [2023-11-24 22:05:21,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:05:21,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:05:21,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:05:21,854 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:05:21,855 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:05:21,856 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac6c3c3d-0d6a-4eb7-8eb3-1b393dfa88c8/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread-wmm/safe015_rmo.i [2023-11-24 22:05:25,105 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:05:25,380 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:05:25,381 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac6c3c3d-0d6a-4eb7-8eb3-1b393dfa88c8/sv-benchmarks/c/pthread-wmm/safe015_rmo.i [2023-11-24 22:05:25,398 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac6c3c3d-0d6a-4eb7-8eb3-1b393dfa88c8/bin/uautomizer-verify-NlZe1sFDwI/data/128e9fc7e/e21a06f2af8e43e59fc7f72745ec00e6/FLAGec65ec2cd [2023-11-24 22:05:25,412 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac6c3c3d-0d6a-4eb7-8eb3-1b393dfa88c8/bin/uautomizer-verify-NlZe1sFDwI/data/128e9fc7e/e21a06f2af8e43e59fc7f72745ec00e6 [2023-11-24 22:05:25,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:05:25,417 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:05:25,418 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:05:25,418 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:05:25,424 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:05:25,425 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:05:25" (1/1) ... [2023-11-24 22:05:25,426 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e21a604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:25, skipping insertion in model container [2023-11-24 22:05:25,426 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:05:25" (1/1) ... [2023-11-24 22:05:25,478 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:05:26,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:05:26,017 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:05:26,083 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:05:26,120 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:05:26,120 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:05:26,128 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:05:26,128 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:26 WrapperNode [2023-11-24 22:05:26,129 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:05:26,130 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:05:26,130 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:05:26,130 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:05:26,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:26" (1/1) ... [2023-11-24 22:05:26,160 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:26" (1/1) ... [2023-11-24 22:05:26,206 INFO L138 Inliner]: procedures = 176, calls = 85, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 171 [2023-11-24 22:05:26,206 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:05:26,207 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:05:26,207 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:05:26,207 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:05:26,219 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:26" (1/1) ... [2023-11-24 22:05:26,220 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:26" (1/1) ... [2023-11-24 22:05:26,228 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:26" (1/1) ... [2023-11-24 22:05:26,272 INFO L175 MemorySlicer]: Split 33 memory accesses to 5 slices as follows [2, 28, 1, 1, 1]. 85 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0, 0, 0]. The 14 writes are split as follows [0, 11, 1, 1, 1]. [2023-11-24 22:05:26,277 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:26" (1/1) ... [2023-11-24 22:05:26,278 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:26" (1/1) ... [2023-11-24 22:05:26,292 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:26" (1/1) ... [2023-11-24 22:05:26,295 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:26" (1/1) ... [2023-11-24 22:05:26,299 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:26" (1/1) ... [2023-11-24 22:05:26,302 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:26" (1/1) ... [2023-11-24 22:05:26,318 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:05:26,323 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:05:26,323 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:05:26,323 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:05:26,324 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:26" (1/1) ... [2023-11-24 22:05:26,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:05:26,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac6c3c3d-0d6a-4eb7-8eb3-1b393dfa88c8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:26,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac6c3c3d-0d6a-4eb7-8eb3-1b393dfa88c8/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:05:26,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac6c3c3d-0d6a-4eb7-8eb3-1b393dfa88c8/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:05:26,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 22:05:26,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 22:05:26,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 22:05:26,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 22:05:26,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 22:05:26,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 22:05:26,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 22:05:26,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 22:05:26,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 22:05:26,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 22:05:26,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 22:05:26,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:05:26,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:05:26,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:05:26,456 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-24 22:05:26,457 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-24 22:05:26,457 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-24 22:05:26,457 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-24 22:05:26,457 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-24 22:05:26,458 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-24 22:05:26,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:05:26,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 22:05:26,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 22:05:26,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 22:05:26,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 22:05:26,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 22:05:26,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:05:26,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:05:26,483 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 22:05:26,672 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:05:26,674 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:05:27,420 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:05:28,341 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:05:28,341 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 22:05:28,342 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:05:28 BoogieIcfgContainer [2023-11-24 22:05:28,342 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:05:28,347 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:05:28,347 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:05:28,351 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:05:28,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:05:25" (1/3) ... [2023-11-24 22:05:28,352 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76dbb9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:05:28, skipping insertion in model container [2023-11-24 22:05:28,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:26" (2/3) ... [2023-11-24 22:05:28,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76dbb9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:05:28, skipping insertion in model container [2023-11-24 22:05:28,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:05:28" (3/3) ... [2023-11-24 22:05:28,358 INFO L112 eAbstractionObserver]: Analyzing ICFG safe015_rmo.i [2023-11-24 22:05:28,379 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:05:28,379 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2023-11-24 22:05:28,380 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 22:05:28,541 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 22:05:28,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 107 transitions, 226 flow [2023-11-24 22:05:28,652 INFO L124 PetriNetUnfolderBase]: 2/104 cut-off events. [2023-11-24 22:05:28,653 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:05:28,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 104 events. 2/104 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 419 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 103. Up to 2 conditions per place. [2023-11-24 22:05:28,658 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 107 transitions, 226 flow [2023-11-24 22:05:28,665 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 104 transitions, 217 flow [2023-11-24 22:05:28,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:05:28,682 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;@57378472, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:05:28,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 101 error locations. [2023-11-24 22:05:28,685 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:05:28,685 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 22:05:28,686 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:05:28,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:28,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 22:05:28,687 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 22:05:28,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:28,692 INFO L85 PathProgramCache]: Analyzing trace with hash 30105, now seen corresponding path program 1 times [2023-11-24 22:05:28,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:28,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751890649] [2023-11-24 22:05:28,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:28,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:29,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:29,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751890649] [2023-11-24 22:05:29,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751890649] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:29,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:29,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:05:29,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581277989] [2023-11-24 22:05:29,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:29,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:29,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:29,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:29,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:05:29,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 107 [2023-11-24 22:05:29,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 104 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:29,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:29,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 107 [2023-11-24 22:05:29,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:38,225 INFO L124 PetriNetUnfolderBase]: 28568/43016 cut-off events. [2023-11-24 22:05:38,225 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-11-24 22:05:38,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82923 conditions, 43016 events. 28568/43016 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 4308. Compared 394807 event pairs, 25158 based on Foata normal form. 1300/20718 useless extension candidates. Maximal degree in co-relation 82909. Up to 35050 conditions per place. [2023-11-24 22:05:38,656 INFO L140 encePairwiseOnDemand]: 72/107 looper letters, 71 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-11-24 22:05:38,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 95 transitions, 345 flow [2023-11-24 22:05:38,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:05:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2023-11-24 22:05:38,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6261682242990654 [2023-11-24 22:05:38,675 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2023-11-24 22:05:38,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2023-11-24 22:05:38,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:38,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2023-11-24 22:05:38,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 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 22:05:38,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:38,694 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:38,696 INFO L175 Difference]: Start difference. First operand has 112 places, 104 transitions, 217 flow. Second operand 3 states and 201 transitions. [2023-11-24 22:05:38,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 95 transitions, 345 flow [2023-11-24 22:05:38,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 95 transitions, 342 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 22:05:38,713 INFO L231 Difference]: Finished difference. Result has 79 places, 70 transitions, 150 flow [2023-11-24 22:05:38,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=79, PETRI_TRANSITIONS=70} [2023-11-24 22:05:38,720 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -33 predicate places. [2023-11-24 22:05:38,720 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 70 transitions, 150 flow [2023-11-24 22:05:38,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:38,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:38,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 22:05:38,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:05:38,722 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 22:05:38,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:38,724 INFO L85 PathProgramCache]: Analyzing trace with hash 30106, now seen corresponding path program 1 times [2023-11-24 22:05:38,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:38,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461300511] [2023-11-24 22:05:38,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:38,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:38,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:38,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461300511] [2023-11-24 22:05:38,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461300511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:38,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:38,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:05:38,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7135215] [2023-11-24 22:05:38,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:38,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:38,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:38,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:38,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:05:38,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 107 [2023-11-24 22:05:38,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 70 transitions, 150 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 22:05:38,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:38,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 107 [2023-11-24 22:05:38,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:46,644 INFO L124 PetriNetUnfolderBase]: 28568/43015 cut-off events. [2023-11-24 22:05:46,644 INFO L125 PetriNetUnfolderBase]: For 650/650 co-relation queries the response was YES. [2023-11-24 22:05:46,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83570 conditions, 43015 events. 28568/43015 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 4308. Compared 394676 event pairs, 25158 based on Foata normal form. 1/19418 useless extension candidates. Maximal degree in co-relation 83559. Up to 35049 conditions per place. [2023-11-24 22:05:47,019 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 70 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-11-24 22:05:47,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 94 transitions, 342 flow [2023-11-24 22:05:47,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:47,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:05:47,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2023-11-24 22:05:47,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470404984423676 [2023-11-24 22:05:47,031 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 151 transitions. [2023-11-24 22:05:47,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 151 transitions. [2023-11-24 22:05:47,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:47,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 151 transitions. [2023-11-24 22:05:47,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 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 22:05:47,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:47,040 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:47,040 INFO L175 Difference]: Start difference. First operand has 79 places, 70 transitions, 150 flow. Second operand 3 states and 151 transitions. [2023-11-24 22:05:47,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 94 transitions, 342 flow [2023-11-24 22:05:47,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 94 transitions, 338 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:05:47,299 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 148 flow [2023-11-24 22:05:47,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2023-11-24 22:05:47,300 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -34 predicate places. [2023-11-24 22:05:47,301 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 148 flow [2023-11-24 22:05:47,301 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 22:05:47,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:47,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:05:47,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:05:47,302 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 22:05:47,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:47,303 INFO L85 PathProgramCache]: Analyzing trace with hash 897845779, now seen corresponding path program 1 times [2023-11-24 22:05:47,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:47,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306130734] [2023-11-24 22:05:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:47,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:47,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:47,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306130734] [2023-11-24 22:05:47,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306130734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:47,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:47,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:05:47,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043141214] [2023-11-24 22:05:47,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:47,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:47,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:47,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:47,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:05:47,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 107 [2023-11-24 22:05:47,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:47,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:47,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 107 [2023-11-24 22:05:47,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:54,211 INFO L124 PetriNetUnfolderBase]: 28572/42882 cut-off events. [2023-11-24 22:05:54,211 INFO L125 PetriNetUnfolderBase]: For 650/650 co-relation queries the response was YES. [2023-11-24 22:05:54,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83446 conditions, 42882 events. 28572/42882 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 4308. Compared 391809 event pairs, 25288 based on Foata normal form. 0/19291 useless extension candidates. Maximal degree in co-relation 83435. Up to 35052 conditions per place. [2023-11-24 22:05:54,551 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 71 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-11-24 22:05:54,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 342 flow [2023-11-24 22:05:54,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:54,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:05:54,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2023-11-24 22:05:54,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46417445482866043 [2023-11-24 22:05:54,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 149 transitions. [2023-11-24 22:05:54,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 149 transitions. [2023-11-24 22:05:54,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:54,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 149 transitions. [2023-11-24 22:05:54,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:54,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:54,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:54,561 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 148 flow. Second operand 3 states and 149 transitions. [2023-11-24 22:05:54,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 342 flow [2023-11-24 22:05:54,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 93 transitions, 338 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:05:54,707 INFO L231 Difference]: Finished difference. Result has 77 places, 68 transitions, 146 flow [2023-11-24 22:05:54,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2023-11-24 22:05:54,709 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -35 predicate places. [2023-11-24 22:05:54,709 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 146 flow [2023-11-24 22:05:54,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:54,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:54,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:05:54,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:05:54,711 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 22:05:54,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:54,712 INFO L85 PathProgramCache]: Analyzing trace with hash 897845780, now seen corresponding path program 1 times [2023-11-24 22:05:54,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:54,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358734154] [2023-11-24 22:05:54,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:54,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:54,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:54,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358734154] [2023-11-24 22:05:54,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358734154] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:54,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:54,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:05:54,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816467915] [2023-11-24 22:05:54,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:54,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:54,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:54,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:54,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:05:54,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 107 [2023-11-24 22:05:54,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 146 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 22:05:54,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:54,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 107 [2023-11-24 22:05:54,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:01,534 INFO L124 PetriNetUnfolderBase]: 28568/43005 cut-off events. [2023-11-24 22:06:01,534 INFO L125 PetriNetUnfolderBase]: For 654/654 co-relation queries the response was YES. [2023-11-24 22:06:01,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83564 conditions, 43005 events. 28568/43005 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 4308. Compared 392189 event pairs, 18290 based on Foata normal form. 5/19424 useless extension candidates. Maximal degree in co-relation 83554. Up to 35043 conditions per place. [2023-11-24 22:06:01,832 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 70 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-11-24 22:06:01,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 338 flow [2023-11-24 22:06:01,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2023-11-24 22:06:01,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470404984423676 [2023-11-24 22:06:01,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 151 transitions. [2023-11-24 22:06:01,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 151 transitions. [2023-11-24 22:06:01,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:01,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 151 transitions. [2023-11-24 22:06:01,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 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 22:06:01,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:01,843 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:01,844 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 146 flow. Second operand 3 states and 151 transitions. [2023-11-24 22:06:01,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 338 flow [2023-11-24 22:06:01,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:01,877 INFO L231 Difference]: Finished difference. Result has 76 places, 67 transitions, 144 flow [2023-11-24 22:06:01,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=76, PETRI_TRANSITIONS=67} [2023-11-24 22:06:01,880 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -36 predicate places. [2023-11-24 22:06:01,881 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 67 transitions, 144 flow [2023-11-24 22:06:01,881 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 22:06:01,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:01,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:01,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 22:06:01,883 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 22:06:01,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:01,884 INFO L85 PathProgramCache]: Analyzing trace with hash -457162130, now seen corresponding path program 1 times [2023-11-24 22:06:01,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:01,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324737433] [2023-11-24 22:06:01,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:01,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:02,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:02,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324737433] [2023-11-24 22:06:02,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324737433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:02,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:02,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:06:02,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45486763] [2023-11-24 22:06:02,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:02,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:06:02,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:02,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:06:02,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:06:02,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 107 [2023-11-24 22:06:02,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 67 transitions, 144 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 22:06:02,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:02,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 107 [2023-11-24 22:06:02,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:05,384 INFO L124 PetriNetUnfolderBase]: 11981/19262 cut-off events. [2023-11-24 22:06:05,385 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2023-11-24 22:06:05,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37110 conditions, 19262 events. 11981/19262 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 1665. Compared 170592 event pairs, 8073 based on Foata normal form. 0/11356 useless extension candidates. Maximal degree in co-relation 37099. Up to 10527 conditions per place. [2023-11-24 22:06:05,539 INFO L140 encePairwiseOnDemand]: 88/107 looper letters, 72 selfloop transitions, 8 changer transitions 0/99 dead transitions. [2023-11-24 22:06:05,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 99 transitions, 368 flow [2023-11-24 22:06:05,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:06:05,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:06:05,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 203 transitions. [2023-11-24 22:06:05,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742990654205608 [2023-11-24 22:06:05,544 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 203 transitions. [2023-11-24 22:06:05,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 203 transitions. [2023-11-24 22:06:05,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:05,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 203 transitions. [2023-11-24 22:06:05,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:05,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:05,549 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:05,550 INFO L175 Difference]: Start difference. First operand has 76 places, 67 transitions, 144 flow. Second operand 4 states and 203 transitions. [2023-11-24 22:06:05,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 99 transitions, 368 flow [2023-11-24 22:06:05,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 99 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:05,561 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 222 flow [2023-11-24 22:06:05,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, 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=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2023-11-24 22:06:05,566 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -35 predicate places. [2023-11-24 22:06:05,571 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 222 flow [2023-11-24 22:06:05,571 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 22:06:05,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:05,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:05,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 22:06:05,572 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 22:06:05,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:05,575 INFO L85 PathProgramCache]: Analyzing trace with hash -457162129, now seen corresponding path program 1 times [2023-11-24 22:06:05,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:05,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481075708] [2023-11-24 22:06:05,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:05,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:05,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:05,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481075708] [2023-11-24 22:06:05,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481075708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:05,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:05,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:06:05,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925665040] [2023-11-24 22:06:05,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:05,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:06:05,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:05,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:06:05,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:06:05,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 107 [2023-11-24 22:06:05,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 222 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 22:06:05,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:05,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 107 [2023-11-24 22:06:05,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:07,041 INFO L124 PetriNetUnfolderBase]: 2656/4768 cut-off events. [2023-11-24 22:06:07,041 INFO L125 PetriNetUnfolderBase]: For 2024/2042 co-relation queries the response was YES. [2023-11-24 22:06:07,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12268 conditions, 4768 events. 2656/4768 cut-off events. For 2024/2042 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 37652 event pairs, 1772 based on Foata normal form. 1582/6046 useless extension candidates. Maximal degree in co-relation 12254. Up to 2398 conditions per place. [2023-11-24 22:06:07,075 INFO L140 encePairwiseOnDemand]: 94/107 looper letters, 46 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-11-24 22:06:07,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 68 transitions, 326 flow [2023-11-24 22:06:07,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:06:07,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:06:07,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 169 transitions. [2023-11-24 22:06:07,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39485981308411217 [2023-11-24 22:06:07,078 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 169 transitions. [2023-11-24 22:06:07,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 169 transitions. [2023-11-24 22:06:07,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:07,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 169 transitions. [2023-11-24 22:06:07,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:07,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:07,082 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:07,082 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 222 flow. Second operand 4 states and 169 transitions. [2023-11-24 22:06:07,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 68 transitions, 326 flow [2023-11-24 22:06:07,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 68 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:06:07,087 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 202 flow [2023-11-24 22:06:07,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2023-11-24 22:06:07,088 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -44 predicate places. [2023-11-24 22:06:07,089 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 202 flow [2023-11-24 22:06:07,089 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 22:06:07,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:07,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:07,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 22:06:07,090 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 22:06:07,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:07,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1331725042, now seen corresponding path program 1 times [2023-11-24 22:06:07,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:07,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557695989] [2023-11-24 22:06:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:07,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:07,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:07,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557695989] [2023-11-24 22:06:07,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557695989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:07,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:07,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:06:07,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836661139] [2023-11-24 22:06:07,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:07,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:07,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:07,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:07,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:07,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 107 [2023-11-24 22:06:07,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 202 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 22:06:07,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:07,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 107 [2023-11-24 22:06:07,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:08,118 INFO L124 PetriNetUnfolderBase]: 2656/4717 cut-off events. [2023-11-24 22:06:08,118 INFO L125 PetriNetUnfolderBase]: For 2026/2036 co-relation queries the response was YES. [2023-11-24 22:06:08,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12278 conditions, 4717 events. 2656/4717 cut-off events. For 2026/2036 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 37453 event pairs, 1756 based on Foata normal form. 15/4445 useless extension candidates. Maximal degree in co-relation 12263. Up to 2433 conditions per place. [2023-11-24 22:06:08,145 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 46 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-11-24 22:06:08,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 326 flow [2023-11-24 22:06:08,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:08,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2023-11-24 22:06:08,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37694704049844235 [2023-11-24 22:06:08,147 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 121 transitions. [2023-11-24 22:06:08,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 121 transitions. [2023-11-24 22:06:08,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:08,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 121 transitions. [2023-11-24 22:06:08,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:08,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:08,150 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:08,150 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 202 flow. Second operand 3 states and 121 transitions. [2023-11-24 22:06:08,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 326 flow [2023-11-24 22:06:08,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 323 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:08,155 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 201 flow [2023-11-24 22:06:08,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2023-11-24 22:06:08,156 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -45 predicate places. [2023-11-24 22:06:08,156 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 201 flow [2023-11-24 22:06:08,156 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 22:06:08,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:08,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:08,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 22:06:08,157 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 22:06:08,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:08,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1331725043, now seen corresponding path program 1 times [2023-11-24 22:06:08,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:08,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562726042] [2023-11-24 22:06:08,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:08,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:08,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:08,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562726042] [2023-11-24 22:06:08,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562726042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:08,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:08,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:06:08,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583331464] [2023-11-24 22:06:08,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:08,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:08,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:08,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:08,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:08,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 107 [2023-11-24 22:06:08,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 201 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 22:06:08,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:08,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 107 [2023-11-24 22:06:08,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:09,202 INFO L124 PetriNetUnfolderBase]: 2678/4781 cut-off events. [2023-11-24 22:06:09,202 INFO L125 PetriNetUnfolderBase]: For 2075/2085 co-relation queries the response was YES. [2023-11-24 22:06:09,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12467 conditions, 4781 events. 2678/4781 cut-off events. For 2075/2085 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 38035 event pairs, 1408 based on Foata normal form. 0/4473 useless extension candidates. Maximal degree in co-relation 12453. Up to 2433 conditions per place. [2023-11-24 22:06:09,238 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 47 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-24 22:06:09,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 66 transitions, 327 flow [2023-11-24 22:06:09,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:09,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:09,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2023-11-24 22:06:09,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707165109034268 [2023-11-24 22:06:09,240 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 119 transitions. [2023-11-24 22:06:09,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 119 transitions. [2023-11-24 22:06:09,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:09,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 119 transitions. [2023-11-24 22:06:09,242 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 22:06:09,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:09,243 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:09,243 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 201 flow. Second operand 3 states and 119 transitions. [2023-11-24 22:06:09,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 66 transitions, 327 flow [2023-11-24 22:06:09,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 323 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:09,247 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 199 flow [2023-11-24 22:06:09,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2023-11-24 22:06:09,248 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -46 predicate places. [2023-11-24 22:06:09,249 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 199 flow [2023-11-24 22:06:09,249 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 22:06:09,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:09,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:09,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 22:06:09,250 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 22:06:09,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:09,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1959635372, now seen corresponding path program 1 times [2023-11-24 22:06:09,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:09,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319230422] [2023-11-24 22:06:09,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:09,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:09,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:09,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319230422] [2023-11-24 22:06:09,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319230422] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:09,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:09,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:09,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105075794] [2023-11-24 22:06:09,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:09,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:09,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:09,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:09,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:09,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 107 [2023-11-24 22:06:09,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 199 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 22:06:09,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:09,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 107 [2023-11-24 22:06:09,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:10,205 INFO L124 PetriNetUnfolderBase]: 2582/4676 cut-off events. [2023-11-24 22:06:10,205 INFO L125 PetriNetUnfolderBase]: For 1902/1911 co-relation queries the response was YES. [2023-11-24 22:06:10,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12149 conditions, 4676 events. 2582/4676 cut-off events. For 1902/1911 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 36750 event pairs, 954 based on Foata normal form. 0/4444 useless extension candidates. Maximal degree in co-relation 12135. Up to 3173 conditions per place. [2023-11-24 22:06:10,236 INFO L140 encePairwiseOnDemand]: 103/107 looper letters, 59 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2023-11-24 22:06:10,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 80 transitions, 419 flow [2023-11-24 22:06:10,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:10,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:10,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2023-11-24 22:06:10,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4205607476635514 [2023-11-24 22:06:10,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2023-11-24 22:06:10,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2023-11-24 22:06:10,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:10,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2023-11-24 22:06:10,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:10,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:10,240 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:10,240 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 199 flow. Second operand 3 states and 135 transitions. [2023-11-24 22:06:10,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 80 transitions, 419 flow [2023-11-24 22:06:10,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 80 transitions, 413 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:10,243 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 208 flow [2023-11-24 22:06:10,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2023-11-24 22:06:10,244 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -45 predicate places. [2023-11-24 22:06:10,245 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 208 flow [2023-11-24 22:06:10,245 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 22:06:10,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:10,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:10,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 22:06:10,246 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 22:06:10,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:10,246 INFO L85 PathProgramCache]: Analyzing trace with hash 2014049246, now seen corresponding path program 1 times [2023-11-24 22:06:10,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:10,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984716160] [2023-11-24 22:06:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:10,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:10,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:10,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:10,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984716160] [2023-11-24 22:06:10,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984716160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:10,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:10,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:06:10,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005567502] [2023-11-24 22:06:10,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:10,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:06:10,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:10,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:06:10,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:06:10,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 107 [2023-11-24 22:06:10,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 208 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 22:06:10,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:10,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 107 [2023-11-24 22:06:10,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:11,491 INFO L124 PetriNetUnfolderBase]: 2702/5047 cut-off events. [2023-11-24 22:06:11,491 INFO L125 PetriNetUnfolderBase]: For 2119/2128 co-relation queries the response was YES. [2023-11-24 22:06:11,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13328 conditions, 5047 events. 2702/5047 cut-off events. For 2119/2128 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 41439 event pairs, 808 based on Foata normal form. 0/4902 useless extension candidates. Maximal degree in co-relation 13312. Up to 1768 conditions per place. [2023-11-24 22:06:11,518 INFO L140 encePairwiseOnDemand]: 98/107 looper letters, 48 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2023-11-24 22:06:11,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 76 transitions, 374 flow [2023-11-24 22:06:11,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:06:11,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:06:11,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 167 transitions. [2023-11-24 22:06:11,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3901869158878505 [2023-11-24 22:06:11,520 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 167 transitions. [2023-11-24 22:06:11,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 167 transitions. [2023-11-24 22:06:11,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:11,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 167 transitions. [2023-11-24 22:06:11,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 41.75) internal successors, (167), 4 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 22:06:11,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:11,523 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:11,523 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 208 flow. Second operand 4 states and 167 transitions. [2023-11-24 22:06:11,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 76 transitions, 374 flow [2023-11-24 22:06:11,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 76 transitions, 368 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:11,527 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 224 flow [2023-11-24 22:06:11,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2023-11-24 22:06:11,528 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -45 predicate places. [2023-11-24 22:06:11,529 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 224 flow [2023-11-24 22:06:11,529 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 22:06:11,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:11,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:11,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 22:06:11,530 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 22:06:11,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:11,530 INFO L85 PathProgramCache]: Analyzing trace with hash 2014049247, now seen corresponding path program 1 times [2023-11-24 22:06:11,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:11,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888043490] [2023-11-24 22:06:11,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:11,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:11,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:11,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888043490] [2023-11-24 22:06:11,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888043490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:11,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:11,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:06:11,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552535373] [2023-11-24 22:06:11,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:11,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:06:11,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:11,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:06:11,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:06:11,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 107 [2023-11-24 22:06:11,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 224 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 22:06:11,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:11,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 107 [2023-11-24 22:06:11,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:12,596 INFO L124 PetriNetUnfolderBase]: 2606/4898 cut-off events. [2023-11-24 22:06:12,596 INFO L125 PetriNetUnfolderBase]: For 2910/2919 co-relation queries the response was YES. [2023-11-24 22:06:12,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13362 conditions, 4898 events. 2606/4898 cut-off events. For 2910/2919 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 40417 event pairs, 920 based on Foata normal form. 45/4794 useless extension candidates. Maximal degree in co-relation 13346. Up to 3302 conditions per place. [2023-11-24 22:06:12,625 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 57 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2023-11-24 22:06:12,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 78 transitions, 436 flow [2023-11-24 22:06:12,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:06:12,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:06:12,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 159 transitions. [2023-11-24 22:06:12,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37149532710280375 [2023-11-24 22:06:12,627 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 159 transitions. [2023-11-24 22:06:12,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 159 transitions. [2023-11-24 22:06:12,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:12,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 159 transitions. [2023-11-24 22:06:12,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:12,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:12,630 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:12,631 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 224 flow. Second operand 4 states and 159 transitions. [2023-11-24 22:06:12,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 78 transitions, 436 flow [2023-11-24 22:06:12,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 78 transitions, 420 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:12,635 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 214 flow [2023-11-24 22:06:12,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2023-11-24 22:06:12,636 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -45 predicate places. [2023-11-24 22:06:12,636 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 214 flow [2023-11-24 22:06:12,636 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 22:06:12,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:12,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:12,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 22:06:12,637 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 22:06:12,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:12,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1619834890, now seen corresponding path program 1 times [2023-11-24 22:06:12,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:12,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130610666] [2023-11-24 22:06:12,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:12,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:13,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:13,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130610666] [2023-11-24 22:06:13,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130610666] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:13,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:13,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 22:06:13,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581528995] [2023-11-24 22:06:13,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:13,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 22:06:13,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:13,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 22:06:13,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 22:06:13,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 107 [2023-11-24 22:06:13,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 214 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:13,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:13,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 107 [2023-11-24 22:06:13,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:14,728 INFO L124 PetriNetUnfolderBase]: 2608/4832 cut-off events. [2023-11-24 22:06:14,728 INFO L125 PetriNetUnfolderBase]: For 2535/2535 co-relation queries the response was YES. [2023-11-24 22:06:14,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13242 conditions, 4832 events. 2608/4832 cut-off events. For 2535/2535 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 38805 event pairs, 696 based on Foata normal form. 0/4686 useless extension candidates. Maximal degree in co-relation 13226. Up to 2810 conditions per place. [2023-11-24 22:06:14,756 INFO L140 encePairwiseOnDemand]: 101/107 looper letters, 62 selfloop transitions, 6 changer transitions 0/84 dead transitions. [2023-11-24 22:06:14,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 440 flow [2023-11-24 22:06:14,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 22:06:14,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-24 22:06:14,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 224 transitions. [2023-11-24 22:06:14,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29906542056074764 [2023-11-24 22:06:14,759 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 224 transitions. [2023-11-24 22:06:14,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 224 transitions. [2023-11-24 22:06:14,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:14,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 224 transitions. [2023-11-24 22:06:14,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:14,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 107.0) internal successors, (856), 8 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:14,763 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 107.0) internal successors, (856), 8 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:14,763 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 214 flow. Second operand 7 states and 224 transitions. [2023-11-24 22:06:14,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 440 flow [2023-11-24 22:06:14,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 84 transitions, 435 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:14,769 INFO L231 Difference]: Finished difference. Result has 71 places, 56 transitions, 232 flow [2023-11-24 22:06:14,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=232, PETRI_PLACES=71, PETRI_TRANSITIONS=56} [2023-11-24 22:06:14,770 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -41 predicate places. [2023-11-24 22:06:14,770 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 56 transitions, 232 flow [2023-11-24 22:06:14,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:14,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:14,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:14,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 22:06:14,771 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-24 22:06:14,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:14,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1619833705, now seen corresponding path program 1 times [2023-11-24 22:06:14,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:14,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886619062] [2023-11-24 22:06:14,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:14,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:15,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:15,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886619062] [2023-11-24 22:06:15,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886619062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:15,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:15,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:06:15,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015985311] [2023-11-24 22:06:15,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:15,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:06:15,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:15,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:06:15,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:06:15,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 107 [2023-11-24 22:06:15,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 56 transitions, 232 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 22:06:15,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:15,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 107 [2023-11-24 22:06:15,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand