./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe021_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe021_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe021_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe021_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 00:58:29,318 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:58:29,385 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:58:29,390 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:58:29,391 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:58:29,423 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:58:29,424 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:58:29,424 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:58:29,425 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:58:29,429 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:58:29,429 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:58:29,429 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:58:29,430 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:58:29,431 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:58:29,432 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:58:29,432 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:58:29,432 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:58:29,433 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:58:29,433 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:58:29,433 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:58:29,434 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:58:29,435 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:58:29,435 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:58:29,436 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:58:29,436 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:58:29,436 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:58:29,436 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:58:29,437 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:58:29,437 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:58:29,438 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:58:29,439 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:58:29,439 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:58:29,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:58:29,439 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:58:29,440 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:58:29,440 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:58:29,440 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:58:29,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:58:29,441 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:58:29,441 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:58:29,441 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:58:29,441 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:58:29,442 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:58:29,442 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 00:58:29,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:58:29,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:58:29,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:58:29,718 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:58:29,719 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:58:29,720 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe021_tso.yml/witness.yml [2024-06-28 00:58:29,851 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:58:29,851 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:58:29,852 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe021_tso.i [2024-06-28 00:58:30,987 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:58:31,267 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:58:31,267 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_tso.i [2024-06-28 00:58:31,282 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c364dfcb/b8624854fd0e42bda9bd696c95ffb6e3/FLAG850b07df7 [2024-06-28 00:58:31,298 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c364dfcb/b8624854fd0e42bda9bd696c95ffb6e3 [2024-06-28 00:58:31,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:58:31,300 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:58:31,302 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:58:31,302 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:58:31,307 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:58:31,307 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:58:29" (1/2) ... [2024-06-28 00:58:31,308 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bcbf62e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:58:31, skipping insertion in model container [2024-06-28 00:58:31,309 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:58:29" (1/2) ... [2024-06-28 00:58:31,310 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7cc3c56c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:58:31, skipping insertion in model container [2024-06-28 00:58:31,310 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:58:31" (2/2) ... [2024-06-28 00:58:31,311 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bcbf62e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:58:31, skipping insertion in model container [2024-06-28 00:58:31,311 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:58:31" (2/2) ... [2024-06-28 00:58:31,311 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:58:31,360 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:58:31,361 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (y == 0 || y == 1)) [2024-06-28 00:58:31,362 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (y == 0 || y == 1)) [2024-06-28 00:58:31,362 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (y == 0 || y == 1)) [2024-06-28 00:58:31,362 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:58:31,362 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-28 00:58:31,405 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:58:31,591 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_tso.i[945,958] [2024-06-28 00:58:31,767 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:58:31,775 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 00:58:31,816 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:58:31,879 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:58:31,917 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:58:31,918 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:58:31 WrapperNode [2024-06-28 00:58:31,918 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:58:31,918 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:58:31,918 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:58:31,919 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:58:31,924 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:58:31" (1/1) ... [2024-06-28 00:58:31,935 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:58:31" (1/1) ... [2024-06-28 00:58:31,959 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2024-06-28 00:58:31,960 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:58:31,960 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:58:31,961 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:58:31,961 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:58:31,971 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:58:31" (1/1) ... [2024-06-28 00:58:31,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:58:31" (1/1) ... [2024-06-28 00:58:31,974 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:58:31" (1/1) ... [2024-06-28 00:58:31,986 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-28 00:58:31,987 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:58:31" (1/1) ... [2024-06-28 00:58:31,987 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:58:31" (1/1) ... [2024-06-28 00:58:32,006 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:58:31" (1/1) ... [2024-06-28 00:58:32,008 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:58:31" (1/1) ... [2024-06-28 00:58:32,009 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:58:31" (1/1) ... [2024-06-28 00:58:32,010 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:58:31" (1/1) ... [2024-06-28 00:58:32,013 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:58:32,013 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:58:32,013 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:58:32,013 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:58:32,014 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:58:31" (1/1) ... [2024-06-28 00:58:32,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:58:32,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:58:32,053 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 00:58:32,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 00:58:32,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:58:32,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:58:32,089 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:58:32,090 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:58:32,090 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:58:32,090 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:58:32,090 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:58:32,091 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:58:32,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:58:32,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:58:32,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:58:32,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:58:32,093 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:58:32,236 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:58:32,240 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:58:32,483 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:58:32,484 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:58:32,534 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:58:32,535 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:58:32,535 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:58:32 BoogieIcfgContainer [2024-06-28 00:58:32,535 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:58:32,537 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:58:32,537 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:58:32,540 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:58:32,540 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:58:29" (1/4) ... [2024-06-28 00:58:32,541 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc7094f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:58:32, skipping insertion in model container [2024-06-28 00:58:32,541 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:58:31" (2/4) ... [2024-06-28 00:58:32,541 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc7094f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:58:32, skipping insertion in model container [2024-06-28 00:58:32,541 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:58:31" (3/4) ... [2024-06-28 00:58:32,542 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc7094f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:58:32, skipping insertion in model container [2024-06-28 00:58:32,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:58:32" (4/4) ... [2024-06-28 00:58:32,543 INFO L112 eAbstractionObserver]: Analyzing ICFG safe021_tso.i [2024-06-28 00:58:32,558 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:58:32,559 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 00:58:32,559 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:58:32,598 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:58:32,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 45 transitions, 102 flow [2024-06-28 00:58:32,649 INFO L124 PetriNetUnfolderBase]: 1/42 cut-off events. [2024-06-28 00:58:32,649 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:58:32,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 42 events. 1/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-06-28 00:58:32,652 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 45 transitions, 102 flow [2024-06-28 00:58:32,655 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 39 transitions, 87 flow [2024-06-28 00:58:32,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:58:32,668 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=LoopHeads, 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;@5321373, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:58:32,669 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-28 00:58:32,672 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:58:32,672 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 00:58:32,672 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:58:32,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:32,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:58:32,673 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:32,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:32,677 INFO L85 PathProgramCache]: Analyzing trace with hash 210327718, now seen corresponding path program 1 times [2024-06-28 00:58:32,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:32,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742852494] [2024-06-28 00:58:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:32,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:33,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:33,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742852494] [2024-06-28 00:58:33,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742852494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:33,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:33,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:58:33,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138380606] [2024-06-28 00:58:33,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:33,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:58:33,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:33,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:58:33,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:58:33,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-28 00:58:33,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:33,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:33,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-28 00:58:33,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:33,476 INFO L124 PetriNetUnfolderBase]: 946/1617 cut-off events. [2024-06-28 00:58:33,476 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-28 00:58:33,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3123 conditions, 1617 events. 946/1617 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9333 event pairs, 686 based on Foata normal form. 1/1542 useless extension candidates. Maximal degree in co-relation 3111. Up to 1429 conditions per place. [2024-06-28 00:58:33,490 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 32 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-06-28 00:58:33,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 51 transitions, 189 flow [2024-06-28 00:58:33,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:58:33,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:58:33,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-28 00:58:33,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-06-28 00:58:33,503 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 87 flow. Second operand 3 states and 96 transitions. [2024-06-28 00:58:33,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 51 transitions, 189 flow [2024-06-28 00:58:33,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:58:33,513 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 114 flow [2024-06-28 00:58:33,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-28 00:58:33,538 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-06-28 00:58:33,539 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 114 flow [2024-06-28 00:58:33,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:33,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:33,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:33,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:58:33,540 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:33,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:33,541 INFO L85 PathProgramCache]: Analyzing trace with hash 262436515, now seen corresponding path program 1 times [2024-06-28 00:58:33,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:33,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767702401] [2024-06-28 00:58:33,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:33,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:33,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:33,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767702401] [2024-06-28 00:58:33,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767702401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:33,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:33,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:58:33,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762772100] [2024-06-28 00:58:33,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:33,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:58:33,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:33,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:58:33,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:58:33,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:58:33,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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) [2024-06-28 00:58:33,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:33,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:58:33,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:34,019 INFO L124 PetriNetUnfolderBase]: 1237/2191 cut-off events. [2024-06-28 00:58:34,020 INFO L125 PetriNetUnfolderBase]: For 382/425 co-relation queries the response was YES. [2024-06-28 00:58:34,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4620 conditions, 2191 events. 1237/2191 cut-off events. For 382/425 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12956 event pairs, 792 based on Foata normal form. 3/2134 useless extension candidates. Maximal degree in co-relation 4608. Up to 1822 conditions per place. [2024-06-28 00:58:34,034 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 45 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2024-06-28 00:58:34,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 282 flow [2024-06-28 00:58:34,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:58:34,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:58:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-06-28 00:58:34,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-28 00:58:34,037 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 114 flow. Second operand 4 states and 124 transitions. [2024-06-28 00:58:34,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 282 flow [2024-06-28 00:58:34,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 66 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:58:34,039 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 166 flow [2024-06-28 00:58:34,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-06-28 00:58:34,040 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-06-28 00:58:34,041 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 166 flow [2024-06-28 00:58:34,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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) [2024-06-28 00:58:34,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:34,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:34,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:58:34,042 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:34,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:34,043 INFO L85 PathProgramCache]: Analyzing trace with hash -454402221, now seen corresponding path program 1 times [2024-06-28 00:58:34,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:34,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506336637] [2024-06-28 00:58:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:34,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:34,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:34,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506336637] [2024-06-28 00:58:34,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506336637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:34,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:34,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:58:34,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973880789] [2024-06-28 00:58:34,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:34,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:58:34,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:34,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:58:34,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:58:34,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:58:34,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:34,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:34,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:58:34,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:34,451 INFO L124 PetriNetUnfolderBase]: 1251/2068 cut-off events. [2024-06-28 00:58:34,452 INFO L125 PetriNetUnfolderBase]: For 969/972 co-relation queries the response was YES. [2024-06-28 00:58:34,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5025 conditions, 2068 events. 1251/2068 cut-off events. For 969/972 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11529 event pairs, 411 based on Foata normal form. 7/2070 useless extension candidates. Maximal degree in co-relation 5010. Up to 1754 conditions per place. [2024-06-28 00:58:34,467 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 60 selfloop transitions, 16 changer transitions 0/90 dead transitions. [2024-06-28 00:58:34,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 90 transitions, 444 flow [2024-06-28 00:58:34,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:58:34,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:58:34,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-28 00:58:34,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.72 [2024-06-28 00:58:34,472 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 166 flow. Second operand 5 states and 162 transitions. [2024-06-28 00:58:34,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 90 transitions, 444 flow [2024-06-28 00:58:34,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 90 transitions, 442 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-28 00:58:34,478 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 271 flow [2024-06-28 00:58:34,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-06-28 00:58:34,480 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 11 predicate places. [2024-06-28 00:58:34,480 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 271 flow [2024-06-28 00:58:34,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:34,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:34,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:34,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:58:34,481 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:34,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:34,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1166911888, now seen corresponding path program 1 times [2024-06-28 00:58:34,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:34,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246113753] [2024-06-28 00:58:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:34,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:34,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:34,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246113753] [2024-06-28 00:58:34,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246113753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:34,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:34,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:34,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210021452] [2024-06-28 00:58:34,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:34,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:34,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:34,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:34,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:34,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:58:34,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 271 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:34,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:34,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:58:34,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:35,019 INFO L124 PetriNetUnfolderBase]: 1273/2100 cut-off events. [2024-06-28 00:58:35,019 INFO L125 PetriNetUnfolderBase]: For 2258/2271 co-relation queries the response was YES. [2024-06-28 00:58:35,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6076 conditions, 2100 events. 1273/2100 cut-off events. For 2258/2271 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11684 event pairs, 261 based on Foata normal form. 14/2109 useless extension candidates. Maximal degree in co-relation 6056. Up to 1720 conditions per place. [2024-06-28 00:58:35,036 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 66 selfloop transitions, 19 changer transitions 0/99 dead transitions. [2024-06-28 00:58:35,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 99 transitions, 565 flow [2024-06-28 00:58:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:35,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-28 00:58:35,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-06-28 00:58:35,039 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 271 flow. Second operand 6 states and 189 transitions. [2024-06-28 00:58:35,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 99 transitions, 565 flow [2024-06-28 00:58:35,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 99 transitions, 555 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-28 00:58:35,047 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 323 flow [2024-06-28 00:58:35,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=323, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-06-28 00:58:35,048 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2024-06-28 00:58:35,049 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 323 flow [2024-06-28 00:58:35,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:35,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:35,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:35,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:58:35,049 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:35,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:35,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1264682939, now seen corresponding path program 1 times [2024-06-28 00:58:35,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:35,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884054632] [2024-06-28 00:58:35,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:35,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:35,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:35,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884054632] [2024-06-28 00:58:35,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884054632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:35,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:35,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:58:35,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771419911] [2024-06-28 00:58:35,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:35,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:58:35,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:35,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:58:35,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:58:35,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-28 00:58:35,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 323 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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) [2024-06-28 00:58:35,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:35,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-28 00:58:35,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:35,462 INFO L124 PetriNetUnfolderBase]: 1142/1902 cut-off events. [2024-06-28 00:58:35,463 INFO L125 PetriNetUnfolderBase]: For 3031/3042 co-relation queries the response was YES. [2024-06-28 00:58:35,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5921 conditions, 1902 events. 1142/1902 cut-off events. For 3031/3042 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10770 event pairs, 344 based on Foata normal form. 3/1847 useless extension candidates. Maximal degree in co-relation 5898. Up to 1641 conditions per place. [2024-06-28 00:58:35,478 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 47 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-06-28 00:58:35,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 79 transitions, 491 flow [2024-06-28 00:58:35,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:58:35,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:58:35,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-28 00:58:35,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-28 00:58:35,480 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 323 flow. Second operand 4 states and 122 transitions. [2024-06-28 00:58:35,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 79 transitions, 491 flow [2024-06-28 00:58:35,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 79 transitions, 447 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 00:58:35,490 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 334 flow [2024-06-28 00:58:35,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=334, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-28 00:58:35,493 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2024-06-28 00:58:35,499 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 334 flow [2024-06-28 00:58:35,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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) [2024-06-28 00:58:35,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:35,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:35,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:58:35,500 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:35,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:35,501 INFO L85 PathProgramCache]: Analyzing trace with hash -551300113, now seen corresponding path program 1 times [2024-06-28 00:58:35,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:35,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410614387] [2024-06-28 00:58:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:35,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:35,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:35,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410614387] [2024-06-28 00:58:35,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410614387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:35,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:35,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:58:35,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866116481] [2024-06-28 00:58:35,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:35,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:58:35,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:35,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:58:35,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:58:35,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:58:35,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 334 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:35,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:35,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:58:35,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:35,984 INFO L124 PetriNetUnfolderBase]: 1440/2395 cut-off events. [2024-06-28 00:58:35,984 INFO L125 PetriNetUnfolderBase]: For 4724/4742 co-relation queries the response was YES. [2024-06-28 00:58:35,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7588 conditions, 2395 events. 1440/2395 cut-off events. For 4724/4742 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14021 event pairs, 645 based on Foata normal form. 2/2354 useless extension candidates. Maximal degree in co-relation 7564. Up to 2056 conditions per place. [2024-06-28 00:58:36,004 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 64 selfloop transitions, 10 changer transitions 0/94 dead transitions. [2024-06-28 00:58:36,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 94 transitions, 591 flow [2024-06-28 00:58:36,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:58:36,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:58:36,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-28 00:58:36,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6488888888888888 [2024-06-28 00:58:36,005 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 334 flow. Second operand 5 states and 146 transitions. [2024-06-28 00:58:36,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 94 transitions, 591 flow [2024-06-28 00:58:36,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 94 transitions, 561 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-28 00:58:36,012 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 413 flow [2024-06-28 00:58:36,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=63, 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=5, PETRI_FLOW=413, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-06-28 00:58:36,013 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 21 predicate places. [2024-06-28 00:58:36,013 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 413 flow [2024-06-28 00:58:36,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:36,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:36,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:36,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:58:36,014 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:36,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:36,014 INFO L85 PathProgramCache]: Analyzing trace with hash -691912382, now seen corresponding path program 1 times [2024-06-28 00:58:36,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:36,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653156341] [2024-06-28 00:58:36,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:36,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:36,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:36,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653156341] [2024-06-28 00:58:36,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653156341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:36,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:36,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:58:36,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748441435] [2024-06-28 00:58:36,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:36,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:58:36,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:36,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:58:36,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:58:36,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:58:36,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 413 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:36,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:36,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:58:36,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:36,449 INFO L124 PetriNetUnfolderBase]: 1497/2558 cut-off events. [2024-06-28 00:58:36,449 INFO L125 PetriNetUnfolderBase]: For 5396/5415 co-relation queries the response was YES. [2024-06-28 00:58:36,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8438 conditions, 2558 events. 1497/2558 cut-off events. For 5396/5415 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14968 event pairs, 484 based on Foata normal form. 10/2550 useless extension candidates. Maximal degree in co-relation 8411. Up to 2062 conditions per place. [2024-06-28 00:58:36,504 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 64 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-28 00:58:36,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 102 transitions, 689 flow [2024-06-28 00:58:36,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:58:36,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:58:36,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-28 00:58:36,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-28 00:58:36,507 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 413 flow. Second operand 5 states and 155 transitions. [2024-06-28 00:58:36,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 102 transitions, 689 flow [2024-06-28 00:58:36,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 102 transitions, 683 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-28 00:58:36,515 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 481 flow [2024-06-28 00:58:36,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=481, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2024-06-28 00:58:36,516 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 26 predicate places. [2024-06-28 00:58:36,516 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 481 flow [2024-06-28 00:58:36,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:36,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:36,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:36,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:58:36,516 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:36,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:36,517 INFO L85 PathProgramCache]: Analyzing trace with hash 115477348, now seen corresponding path program 2 times [2024-06-28 00:58:36,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:36,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157890380] [2024-06-28 00:58:36,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:36,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:36,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:36,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157890380] [2024-06-28 00:58:36,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157890380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:36,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:36,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:58:36,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330074215] [2024-06-28 00:58:36,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:36,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:58:36,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:36,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:58:36,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:58:36,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:58:36,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 481 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:36,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:36,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:58:36,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:36,936 INFO L124 PetriNetUnfolderBase]: 1517/2543 cut-off events. [2024-06-28 00:58:36,937 INFO L125 PetriNetUnfolderBase]: For 6596/6627 co-relation queries the response was YES. [2024-06-28 00:58:36,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8830 conditions, 2543 events. 1517/2543 cut-off events. For 6596/6627 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14858 event pairs, 470 based on Foata normal form. 22/2547 useless extension candidates. Maximal degree in co-relation 8800. Up to 2087 conditions per place. [2024-06-28 00:58:36,961 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 58 selfloop transitions, 22 changer transitions 0/97 dead transitions. [2024-06-28 00:58:36,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 691 flow [2024-06-28 00:58:36,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:58:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:58:36,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-28 00:58:36,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6711111111111111 [2024-06-28 00:58:36,963 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 481 flow. Second operand 5 states and 151 transitions. [2024-06-28 00:58:36,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 691 flow [2024-06-28 00:58:36,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 97 transitions, 664 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 00:58:36,974 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 507 flow [2024-06-28 00:58:36,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=507, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2024-06-28 00:58:36,975 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 29 predicate places. [2024-06-28 00:58:36,975 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 507 flow [2024-06-28 00:58:36,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:36,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:36,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:36,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:58:36,976 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:36,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:36,977 INFO L85 PathProgramCache]: Analyzing trace with hash 569291000, now seen corresponding path program 1 times [2024-06-28 00:58:36,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:36,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000680180] [2024-06-28 00:58:36,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:36,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:37,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:37,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000680180] [2024-06-28 00:58:37,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000680180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:37,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:37,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:37,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345069157] [2024-06-28 00:58:37,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:37,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:37,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:37,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:37,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:37,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:37,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 507 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-06-28 00:58:37,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:37,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:37,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:37,430 INFO L124 PetriNetUnfolderBase]: 1611/2598 cut-off events. [2024-06-28 00:58:37,431 INFO L125 PetriNetUnfolderBase]: For 7896/7899 co-relation queries the response was YES. [2024-06-28 00:58:37,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9248 conditions, 2598 events. 1611/2598 cut-off events. For 7896/7899 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14707 event pairs, 478 based on Foata normal form. 4/2590 useless extension candidates. Maximal degree in co-relation 9217. Up to 2170 conditions per place. [2024-06-28 00:58:37,461 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 92 selfloop transitions, 22 changer transitions 0/127 dead transitions. [2024-06-28 00:58:37,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 127 transitions, 982 flow [2024-06-28 00:58:37,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:37,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:37,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-28 00:58:37,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 00:58:37,463 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 507 flow. Second operand 6 states and 180 transitions. [2024-06-28 00:58:37,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 127 transitions, 982 flow [2024-06-28 00:58:37,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 127 transitions, 884 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 00:58:37,477 INFO L231 Difference]: Finished difference. Result has 81 places, 90 transitions, 607 flow [2024-06-28 00:58:37,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=607, PETRI_PLACES=81, PETRI_TRANSITIONS=90} [2024-06-28 00:58:37,478 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2024-06-28 00:58:37,478 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 90 transitions, 607 flow [2024-06-28 00:58:37,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-06-28 00:58:37,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:37,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:37,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:58:37,479 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:37,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:37,479 INFO L85 PathProgramCache]: Analyzing trace with hash -715168106, now seen corresponding path program 2 times [2024-06-28 00:58:37,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:37,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278484375] [2024-06-28 00:58:37,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:37,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:37,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:37,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278484375] [2024-06-28 00:58:37,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278484375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:37,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:37,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:37,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747447845] [2024-06-28 00:58:37,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:37,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:37,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:37,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:37,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:37,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:37,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 90 transitions, 607 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-06-28 00:58:37,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:37,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:37,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:37,918 INFO L124 PetriNetUnfolderBase]: 1628/2671 cut-off events. [2024-06-28 00:58:37,918 INFO L125 PetriNetUnfolderBase]: For 9369/9369 co-relation queries the response was YES. [2024-06-28 00:58:37,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10050 conditions, 2671 events. 1628/2671 cut-off events. For 9369/9369 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15477 event pairs, 666 based on Foata normal form. 2/2642 useless extension candidates. Maximal degree in co-relation 10017. Up to 2181 conditions per place. [2024-06-28 00:58:37,944 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 89 selfloop transitions, 29 changer transitions 0/131 dead transitions. [2024-06-28 00:58:37,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 131 transitions, 1056 flow [2024-06-28 00:58:37,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:37,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:37,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-28 00:58:37,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 00:58:37,946 INFO L175 Difference]: Start difference. First operand has 81 places, 90 transitions, 607 flow. Second operand 6 states and 180 transitions. [2024-06-28 00:58:37,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 131 transitions, 1056 flow [2024-06-28 00:58:37,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 131 transitions, 1020 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-28 00:58:37,964 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 707 flow [2024-06-28 00:58:37,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=707, PETRI_PLACES=86, PETRI_TRANSITIONS=98} [2024-06-28 00:58:37,965 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 37 predicate places. [2024-06-28 00:58:37,965 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 707 flow [2024-06-28 00:58:37,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-06-28 00:58:37,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:37,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:37,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:58:37,966 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:37,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:37,967 INFO L85 PathProgramCache]: Analyzing trace with hash 202922710, now seen corresponding path program 3 times [2024-06-28 00:58:37,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:37,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605040419] [2024-06-28 00:58:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:37,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:38,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:38,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605040419] [2024-06-28 00:58:38,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605040419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:38,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:38,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:38,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141491682] [2024-06-28 00:58:38,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:38,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:38,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:38,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:38,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:38,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:38,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 98 transitions, 707 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-06-28 00:58:38,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:38,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:38,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:38,423 INFO L124 PetriNetUnfolderBase]: 1623/2678 cut-off events. [2024-06-28 00:58:38,424 INFO L125 PetriNetUnfolderBase]: For 11058/11058 co-relation queries the response was YES. [2024-06-28 00:58:38,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10318 conditions, 2678 events. 1623/2678 cut-off events. For 11058/11058 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15626 event pairs, 664 based on Foata normal form. 2/2647 useless extension candidates. Maximal degree in co-relation 10283. Up to 2178 conditions per place. [2024-06-28 00:58:38,448 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 86 selfloop transitions, 31 changer transitions 0/130 dead transitions. [2024-06-28 00:58:38,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 130 transitions, 1069 flow [2024-06-28 00:58:38,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:38,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-28 00:58:38,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-06-28 00:58:38,450 INFO L175 Difference]: Start difference. First operand has 86 places, 98 transitions, 707 flow. Second operand 6 states and 178 transitions. [2024-06-28 00:58:38,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 130 transitions, 1069 flow [2024-06-28 00:58:38,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 130 transitions, 1040 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-28 00:58:38,470 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 756 flow [2024-06-28 00:58:38,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=756, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2024-06-28 00:58:38,471 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 42 predicate places. [2024-06-28 00:58:38,471 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 756 flow [2024-06-28 00:58:38,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-06-28 00:58:38,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:38,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:38,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:58:38,472 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:38,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:38,472 INFO L85 PathProgramCache]: Analyzing trace with hash 202931638, now seen corresponding path program 1 times [2024-06-28 00:58:38,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:38,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722509434] [2024-06-28 00:58:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:38,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:38,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:38,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722509434] [2024-06-28 00:58:38,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722509434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:38,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:38,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:38,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202982640] [2024-06-28 00:58:38,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:38,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:38,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:38,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:38,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:38,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:58:38,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 756 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:38,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:38,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:58:38,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:38,938 INFO L124 PetriNetUnfolderBase]: 1474/2468 cut-off events. [2024-06-28 00:58:38,938 INFO L125 PetriNetUnfolderBase]: For 12255/12255 co-relation queries the response was YES. [2024-06-28 00:58:38,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9963 conditions, 2468 events. 1474/2468 cut-off events. For 12255/12255 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14409 event pairs, 560 based on Foata normal form. 4/2459 useless extension candidates. Maximal degree in co-relation 9925. Up to 2059 conditions per place. [2024-06-28 00:58:38,963 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 96 selfloop transitions, 12 changer transitions 0/129 dead transitions. [2024-06-28 00:58:38,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 129 transitions, 1052 flow [2024-06-28 00:58:38,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:38,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-28 00:58:38,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-28 00:58:38,965 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 756 flow. Second operand 6 states and 173 transitions. [2024-06-28 00:58:38,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 129 transitions, 1052 flow [2024-06-28 00:58:38,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 129 transitions, 1004 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-28 00:58:38,990 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 757 flow [2024-06-28 00:58:38,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=757, PETRI_PLACES=94, PETRI_TRANSITIONS=101} [2024-06-28 00:58:38,991 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 45 predicate places. [2024-06-28 00:58:38,991 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 101 transitions, 757 flow [2024-06-28 00:58:38,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:38,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:38,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:38,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:58:38,992 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:38,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:38,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1788984490, now seen corresponding path program 1 times [2024-06-28 00:58:38,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:38,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834837529] [2024-06-28 00:58:38,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:38,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:39,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:39,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834837529] [2024-06-28 00:58:39,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834837529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:39,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:39,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:39,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703324371] [2024-06-28 00:58:39,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:39,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:39,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:39,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:39,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:39,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:39,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 101 transitions, 757 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:39,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:39,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:39,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:39,466 INFO L124 PetriNetUnfolderBase]: 1654/2642 cut-off events. [2024-06-28 00:58:39,466 INFO L125 PetriNetUnfolderBase]: For 13681/13684 co-relation queries the response was YES. [2024-06-28 00:58:39,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10912 conditions, 2642 events. 1654/2642 cut-off events. For 13681/13684 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14884 event pairs, 432 based on Foata normal form. 2/2638 useless extension candidates. Maximal degree in co-relation 10873. Up to 2207 conditions per place. [2024-06-28 00:58:39,490 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 97 selfloop transitions, 33 changer transitions 0/143 dead transitions. [2024-06-28 00:58:39,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 143 transitions, 1255 flow [2024-06-28 00:58:39,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:39,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-28 00:58:39,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6703703703703704 [2024-06-28 00:58:39,493 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 757 flow. Second operand 6 states and 181 transitions. [2024-06-28 00:58:39,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 143 transitions, 1255 flow [2024-06-28 00:58:39,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 143 transitions, 1224 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 00:58:39,516 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 873 flow [2024-06-28 00:58:39,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=873, PETRI_PLACES=97, PETRI_TRANSITIONS=108} [2024-06-28 00:58:39,517 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 48 predicate places. [2024-06-28 00:58:39,518 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 873 flow [2024-06-28 00:58:39,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:39,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:39,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:39,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:58:39,518 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:39,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:39,519 INFO L85 PathProgramCache]: Analyzing trace with hash 2038557412, now seen corresponding path program 2 times [2024-06-28 00:58:39,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:39,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106794526] [2024-06-28 00:58:39,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:39,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:39,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:39,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106794526] [2024-06-28 00:58:39,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106794526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:39,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:39,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:39,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440951166] [2024-06-28 00:58:39,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:39,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:39,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:39,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:39,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:39,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:39,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 108 transitions, 873 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:39,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:39,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:39,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:39,982 INFO L124 PetriNetUnfolderBase]: 1649/2723 cut-off events. [2024-06-28 00:58:39,983 INFO L125 PetriNetUnfolderBase]: For 15511/15514 co-relation queries the response was YES. [2024-06-28 00:58:39,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11300 conditions, 2723 events. 1649/2723 cut-off events. For 15511/15514 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15970 event pairs, 644 based on Foata normal form. 2/2697 useless extension candidates. Maximal degree in co-relation 11259. Up to 2202 conditions per place. [2024-06-28 00:58:40,010 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 95 selfloop transitions, 37 changer transitions 0/145 dead transitions. [2024-06-28 00:58:40,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 145 transitions, 1290 flow [2024-06-28 00:58:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-28 00:58:40,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-28 00:58:40,012 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 873 flow. Second operand 6 states and 183 transitions. [2024-06-28 00:58:40,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 145 transitions, 1290 flow [2024-06-28 00:58:40,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 145 transitions, 1248 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 00:58:40,047 INFO L231 Difference]: Finished difference. Result has 102 places, 110 transitions, 953 flow [2024-06-28 00:58:40,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=953, PETRI_PLACES=102, PETRI_TRANSITIONS=110} [2024-06-28 00:58:40,049 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 53 predicate places. [2024-06-28 00:58:40,049 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 110 transitions, 953 flow [2024-06-28 00:58:40,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:40,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:40,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:40,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:58:40,050 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:40,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:40,050 INFO L85 PathProgramCache]: Analyzing trace with hash -688021940, now seen corresponding path program 3 times [2024-06-28 00:58:40,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:40,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779995483] [2024-06-28 00:58:40,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:40,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:40,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:40,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779995483] [2024-06-28 00:58:40,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779995483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:40,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:40,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:40,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796014077] [2024-06-28 00:58:40,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:40,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:40,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:40,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:40,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:40,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:40,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 110 transitions, 953 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:40,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:40,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:40,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:40,545 INFO L124 PetriNetUnfolderBase]: 1644/2734 cut-off events. [2024-06-28 00:58:40,546 INFO L125 PetriNetUnfolderBase]: For 18348/18351 co-relation queries the response was YES. [2024-06-28 00:58:40,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11561 conditions, 2734 events. 1644/2734 cut-off events. For 18348/18351 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16137 event pairs, 680 based on Foata normal form. 4/2701 useless extension candidates. Maximal degree in co-relation 11518. Up to 2197 conditions per place. [2024-06-28 00:58:40,570 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 92 selfloop transitions, 33 changer transitions 0/138 dead transitions. [2024-06-28 00:58:40,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 138 transitions, 1278 flow [2024-06-28 00:58:40,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:40,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:40,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-28 00:58:40,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-28 00:58:40,572 INFO L175 Difference]: Start difference. First operand has 102 places, 110 transitions, 953 flow. Second operand 6 states and 173 transitions. [2024-06-28 00:58:40,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 138 transitions, 1278 flow [2024-06-28 00:58:40,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 138 transitions, 1228 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-28 00:58:40,603 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 988 flow [2024-06-28 00:58:40,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=988, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-06-28 00:58:40,605 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 56 predicate places. [2024-06-28 00:58:40,605 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 988 flow [2024-06-28 00:58:40,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:40,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:40,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:40,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:58:40,606 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:40,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:40,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1007641523, now seen corresponding path program 1 times [2024-06-28 00:58:40,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:40,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498238074] [2024-06-28 00:58:40,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:40,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:40,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:40,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498238074] [2024-06-28 00:58:40,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498238074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:40,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:40,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:40,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892987660] [2024-06-28 00:58:40,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:40,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:40,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:40,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:40,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:40,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:58:40,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 988 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 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) [2024-06-28 00:58:40,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:40,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:58:40,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:41,165 INFO L124 PetriNetUnfolderBase]: 1578/2684 cut-off events. [2024-06-28 00:58:41,165 INFO L125 PetriNetUnfolderBase]: For 21154/21168 co-relation queries the response was YES. [2024-06-28 00:58:41,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11601 conditions, 2684 events. 1578/2684 cut-off events. For 21154/21168 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15799 event pairs, 292 based on Foata normal form. 14/2620 useless extension candidates. Maximal degree in co-relation 11557. Up to 1959 conditions per place. [2024-06-28 00:58:41,189 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 91 selfloop transitions, 30 changer transitions 0/149 dead transitions. [2024-06-28 00:58:41,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 149 transitions, 1398 flow [2024-06-28 00:58:41,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:41,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:41,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-28 00:58:41,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.674074074074074 [2024-06-28 00:58:41,190 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 988 flow. Second operand 6 states and 182 transitions. [2024-06-28 00:58:41,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 149 transitions, 1398 flow [2024-06-28 00:58:41,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 149 transitions, 1347 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-28 00:58:41,223 INFO L231 Difference]: Finished difference. Result has 108 places, 115 transitions, 1036 flow [2024-06-28 00:58:41,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1036, PETRI_PLACES=108, PETRI_TRANSITIONS=115} [2024-06-28 00:58:41,223 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 59 predicate places. [2024-06-28 00:58:41,224 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 115 transitions, 1036 flow [2024-06-28 00:58:41,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 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) [2024-06-28 00:58:41,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:41,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:41,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:58:41,225 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:41,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:41,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1327801317, now seen corresponding path program 2 times [2024-06-28 00:58:41,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:41,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479011302] [2024-06-28 00:58:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:41,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:41,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:41,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479011302] [2024-06-28 00:58:41,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479011302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:41,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:41,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:41,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112064163] [2024-06-28 00:58:41,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:41,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:41,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:41,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:41,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:41,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:58:41,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 115 transitions, 1036 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 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) [2024-06-28 00:58:41,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:41,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:58:41,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:41,712 INFO L124 PetriNetUnfolderBase]: 1575/2688 cut-off events. [2024-06-28 00:58:41,713 INFO L125 PetriNetUnfolderBase]: For 23616/23637 co-relation queries the response was YES. [2024-06-28 00:58:41,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11879 conditions, 2688 events. 1575/2688 cut-off events. For 23616/23637 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15853 event pairs, 406 based on Foata normal form. 9/2620 useless extension candidates. Maximal degree in co-relation 11833. Up to 2072 conditions per place. [2024-06-28 00:58:41,734 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 87 selfloop transitions, 31 changer transitions 0/146 dead transitions. [2024-06-28 00:58:41,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 146 transitions, 1346 flow [2024-06-28 00:58:41,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:41,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:41,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-28 00:58:41,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 00:58:41,736 INFO L175 Difference]: Start difference. First operand has 108 places, 115 transitions, 1036 flow. Second operand 6 states and 180 transitions. [2024-06-28 00:58:41,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 146 transitions, 1346 flow [2024-06-28 00:58:41,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 146 transitions, 1303 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-28 00:58:41,769 INFO L231 Difference]: Finished difference. Result has 112 places, 115 transitions, 1063 flow [2024-06-28 00:58:41,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1063, PETRI_PLACES=112, PETRI_TRANSITIONS=115} [2024-06-28 00:58:41,769 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 63 predicate places. [2024-06-28 00:58:41,770 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 115 transitions, 1063 flow [2024-06-28 00:58:41,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 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) [2024-06-28 00:58:41,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:41,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:41,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:58:41,770 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:41,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:41,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1212325449, now seen corresponding path program 1 times [2024-06-28 00:58:41,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:41,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439121337] [2024-06-28 00:58:41,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:41,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:41,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:41,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439121337] [2024-06-28 00:58:41,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439121337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:41,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:41,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:41,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607943087] [2024-06-28 00:58:41,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:41,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:41,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:41,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:41,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:41,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:41,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 115 transitions, 1063 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:41,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:41,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:41,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:42,287 INFO L124 PetriNetUnfolderBase]: 1797/2867 cut-off events. [2024-06-28 00:58:42,287 INFO L125 PetriNetUnfolderBase]: For 25672/25675 co-relation queries the response was YES. [2024-06-28 00:58:42,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12802 conditions, 2867 events. 1797/2867 cut-off events. For 25672/25675 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16395 event pairs, 395 based on Foata normal form. 20/2881 useless extension candidates. Maximal degree in co-relation 12754. Up to 2278 conditions per place. [2024-06-28 00:58:42,309 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 107 selfloop transitions, 37 changer transitions 0/157 dead transitions. [2024-06-28 00:58:42,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 157 transitions, 1469 flow [2024-06-28 00:58:42,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:58:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:58:42,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-28 00:58:42,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-28 00:58:42,311 INFO L175 Difference]: Start difference. First operand has 112 places, 115 transitions, 1063 flow. Second operand 7 states and 207 transitions. [2024-06-28 00:58:42,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 157 transitions, 1469 flow [2024-06-28 00:58:42,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 157 transitions, 1398 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 00:58:42,350 INFO L231 Difference]: Finished difference. Result has 114 places, 117 transitions, 1094 flow [2024-06-28 00:58:42,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1094, PETRI_PLACES=114, PETRI_TRANSITIONS=117} [2024-06-28 00:58:42,350 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 65 predicate places. [2024-06-28 00:58:42,350 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 117 transitions, 1094 flow [2024-06-28 00:58:42,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:42,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:42,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:42,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:58:42,351 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:42,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:42,352 INFO L85 PathProgramCache]: Analyzing trace with hash 554154173, now seen corresponding path program 2 times [2024-06-28 00:58:42,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:42,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652374460] [2024-06-28 00:58:42,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:42,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:42,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:42,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652374460] [2024-06-28 00:58:42,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652374460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:42,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:42,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:42,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090156406] [2024-06-28 00:58:42,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:42,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:42,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:42,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:42,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:42,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:42,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 117 transitions, 1094 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:42,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:42,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:42,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:42,896 INFO L124 PetriNetUnfolderBase]: 1824/3018 cut-off events. [2024-06-28 00:58:42,896 INFO L125 PetriNetUnfolderBase]: For 26702/26702 co-relation queries the response was YES. [2024-06-28 00:58:42,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13471 conditions, 3018 events. 1824/3018 cut-off events. For 26702/26702 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17962 event pairs, 665 based on Foata normal form. 4/2984 useless extension candidates. Maximal degree in co-relation 13422. Up to 2451 conditions per place. [2024-06-28 00:58:42,924 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 99 selfloop transitions, 41 changer transitions 0/153 dead transitions. [2024-06-28 00:58:42,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 153 transitions, 1474 flow [2024-06-28 00:58:42,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:58:42,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:58:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-28 00:58:42,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-28 00:58:42,928 INFO L175 Difference]: Start difference. First operand has 114 places, 117 transitions, 1094 flow. Second operand 7 states and 202 transitions. [2024-06-28 00:58:42,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 153 transitions, 1474 flow [2024-06-28 00:58:42,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 153 transitions, 1394 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 00:58:42,977 INFO L231 Difference]: Finished difference. Result has 116 places, 119 transitions, 1127 flow [2024-06-28 00:58:42,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1127, PETRI_PLACES=116, PETRI_TRANSITIONS=119} [2024-06-28 00:58:42,978 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 67 predicate places. [2024-06-28 00:58:42,978 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 119 transitions, 1127 flow [2024-06-28 00:58:42,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:42,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:42,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:42,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:58:42,979 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:42,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:42,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1507340727, now seen corresponding path program 3 times [2024-06-28 00:58:42,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:42,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961360031] [2024-06-28 00:58:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:42,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:43,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:43,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961360031] [2024-06-28 00:58:43,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961360031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:43,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:43,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:43,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908102235] [2024-06-28 00:58:43,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:43,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:43,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:43,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:43,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:43,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:43,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 119 transitions, 1127 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:43,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:43,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:43,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:43,523 INFO L124 PetriNetUnfolderBase]: 1851/3037 cut-off events. [2024-06-28 00:58:43,524 INFO L125 PetriNetUnfolderBase]: For 29632/29632 co-relation queries the response was YES. [2024-06-28 00:58:43,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13890 conditions, 3037 events. 1851/3037 cut-off events. For 29632/29632 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17911 event pairs, 495 based on Foata normal form. 4/3021 useless extension candidates. Maximal degree in co-relation 13840. Up to 2492 conditions per place. [2024-06-28 00:58:43,540 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 102 selfloop transitions, 40 changer transitions 0/155 dead transitions. [2024-06-28 00:58:43,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 155 transitions, 1515 flow [2024-06-28 00:58:43,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:58:43,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:58:43,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-28 00:58:43,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-28 00:58:43,541 INFO L175 Difference]: Start difference. First operand has 116 places, 119 transitions, 1127 flow. Second operand 7 states and 202 transitions. [2024-06-28 00:58:43,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 155 transitions, 1515 flow [2024-06-28 00:58:43,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 155 transitions, 1420 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 00:58:43,576 INFO L231 Difference]: Finished difference. Result has 118 places, 121 transitions, 1147 flow [2024-06-28 00:58:43,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1147, PETRI_PLACES=118, PETRI_TRANSITIONS=121} [2024-06-28 00:58:43,576 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 69 predicate places. [2024-06-28 00:58:43,576 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 121 transitions, 1147 flow [2024-06-28 00:58:43,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:43,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:43,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:43,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:58:43,577 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:43,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:43,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1743812757, now seen corresponding path program 4 times [2024-06-28 00:58:43,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:43,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292239854] [2024-06-28 00:58:43,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:43,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:43,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:43,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292239854] [2024-06-28 00:58:43,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292239854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:43,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:43,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:43,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203477106] [2024-06-28 00:58:43,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:43,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:43,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:43,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:43,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:43,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:43,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 121 transitions, 1147 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:43,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:43,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:43,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:44,120 INFO L124 PetriNetUnfolderBase]: 1843/2939 cut-off events. [2024-06-28 00:58:44,120 INFO L125 PetriNetUnfolderBase]: For 31240/31240 co-relation queries the response was YES. [2024-06-28 00:58:44,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13882 conditions, 2939 events. 1843/2939 cut-off events. For 31240/31240 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16845 event pairs, 371 based on Foata normal form. 4/2927 useless extension candidates. Maximal degree in co-relation 13831. Up to 2237 conditions per place. [2024-06-28 00:58:44,140 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 100 selfloop transitions, 48 changer transitions 0/161 dead transitions. [2024-06-28 00:58:44,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 161 transitions, 1567 flow [2024-06-28 00:58:44,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:58:44,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:58:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-28 00:58:44,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2024-06-28 00:58:44,141 INFO L175 Difference]: Start difference. First operand has 118 places, 121 transitions, 1147 flow. Second operand 7 states and 206 transitions. [2024-06-28 00:58:44,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 161 transitions, 1567 flow [2024-06-28 00:58:44,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 161 transitions, 1470 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 00:58:44,220 INFO L231 Difference]: Finished difference. Result has 120 places, 123 transitions, 1185 flow [2024-06-28 00:58:44,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1185, PETRI_PLACES=120, PETRI_TRANSITIONS=123} [2024-06-28 00:58:44,221 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 71 predicate places. [2024-06-28 00:58:44,221 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 123 transitions, 1185 flow [2024-06-28 00:58:44,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:44,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:44,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:44,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:58:44,222 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:44,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:44,223 INFO L85 PathProgramCache]: Analyzing trace with hash -2115886575, now seen corresponding path program 1 times [2024-06-28 00:58:44,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:44,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754875532] [2024-06-28 00:58:44,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:44,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:44,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:44,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754875532] [2024-06-28 00:58:44,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754875532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:44,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:44,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:44,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649576482] [2024-06-28 00:58:44,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:44,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:44,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:44,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:44,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:44,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:44,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 123 transitions, 1185 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:44,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:44,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:44,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:44,727 INFO L124 PetriNetUnfolderBase]: 1997/3227 cut-off events. [2024-06-28 00:58:44,728 INFO L125 PetriNetUnfolderBase]: For 39389/39392 co-relation queries the response was YES. [2024-06-28 00:58:44,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15391 conditions, 3227 events. 1997/3227 cut-off events. For 39389/39392 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19255 event pairs, 356 based on Foata normal form. 12/3224 useless extension candidates. Maximal degree in co-relation 15339. Up to 2058 conditions per place. [2024-06-28 00:58:44,747 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 125 selfloop transitions, 38 changer transitions 0/176 dead transitions. [2024-06-28 00:58:44,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 176 transitions, 1776 flow [2024-06-28 00:58:44,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:58:44,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:58:44,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-28 00:58:44,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 00:58:44,749 INFO L175 Difference]: Start difference. First operand has 120 places, 123 transitions, 1185 flow. Second operand 7 states and 210 transitions. [2024-06-28 00:58:44,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 176 transitions, 1776 flow [2024-06-28 00:58:44,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 176 transitions, 1659 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 00:58:44,794 INFO L231 Difference]: Finished difference. Result has 124 places, 128 transitions, 1229 flow [2024-06-28 00:58:44,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1229, PETRI_PLACES=124, PETRI_TRANSITIONS=128} [2024-06-28 00:58:44,794 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 75 predicate places. [2024-06-28 00:58:44,795 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 128 transitions, 1229 flow [2024-06-28 00:58:44,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:44,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:44,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:44,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:58:44,795 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:44,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:44,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1269419047, now seen corresponding path program 2 times [2024-06-28 00:58:44,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:44,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899113723] [2024-06-28 00:58:44,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:44,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:44,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:44,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899113723] [2024-06-28 00:58:44,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899113723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:44,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:44,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:44,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945398449] [2024-06-28 00:58:44,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:44,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:44,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:44,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:44,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:44,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:44,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 128 transitions, 1229 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:44,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:44,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:44,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:45,322 INFO L124 PetriNetUnfolderBase]: 2064/3473 cut-off events. [2024-06-28 00:58:45,322 INFO L125 PetriNetUnfolderBase]: For 43534/43537 co-relation queries the response was YES. [2024-06-28 00:58:45,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16177 conditions, 3473 events. 2064/3473 cut-off events. For 43534/43537 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 21354 event pairs, 536 based on Foata normal form. 12/3476 useless extension candidates. Maximal degree in co-relation 16122. Up to 2582 conditions per place. [2024-06-28 00:58:45,344 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 122 selfloop transitions, 39 changer transitions 0/174 dead transitions. [2024-06-28 00:58:45,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 174 transitions, 1702 flow [2024-06-28 00:58:45,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:58:45,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:58:45,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-28 00:58:45,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634920634920635 [2024-06-28 00:58:45,346 INFO L175 Difference]: Start difference. First operand has 124 places, 128 transitions, 1229 flow. Second operand 7 states and 209 transitions. [2024-06-28 00:58:45,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 174 transitions, 1702 flow [2024-06-28 00:58:45,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 174 transitions, 1647 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-28 00:58:45,400 INFO L231 Difference]: Finished difference. Result has 130 places, 131 transitions, 1308 flow [2024-06-28 00:58:45,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1308, PETRI_PLACES=130, PETRI_TRANSITIONS=131} [2024-06-28 00:58:45,400 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 81 predicate places. [2024-06-28 00:58:45,401 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 131 transitions, 1308 flow [2024-06-28 00:58:45,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:45,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:45,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:45,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:58:45,401 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:45,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:45,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1066892509, now seen corresponding path program 3 times [2024-06-28 00:58:45,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:45,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173733674] [2024-06-28 00:58:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:45,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:45,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:45,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173733674] [2024-06-28 00:58:45,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173733674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:45,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:45,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:45,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207523797] [2024-06-28 00:58:45,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:45,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:45,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:45,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:45,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:45,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:45,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 131 transitions, 1308 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:45,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:45,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:45,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:45,992 INFO L124 PetriNetUnfolderBase]: 2218/3630 cut-off events. [2024-06-28 00:58:45,992 INFO L125 PetriNetUnfolderBase]: For 51568/51571 co-relation queries the response was YES. [2024-06-28 00:58:46,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17849 conditions, 3630 events. 2218/3630 cut-off events. For 51568/51571 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22365 event pairs, 423 based on Foata normal form. 12/3629 useless extension candidates. Maximal degree in co-relation 17791. Up to 2756 conditions per place. [2024-06-28 00:58:46,016 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 128 selfloop transitions, 41 changer transitions 0/182 dead transitions. [2024-06-28 00:58:46,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 182 transitions, 1905 flow [2024-06-28 00:58:46,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:58:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:58:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-28 00:58:46,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6793650793650794 [2024-06-28 00:58:46,019 INFO L175 Difference]: Start difference. First operand has 130 places, 131 transitions, 1308 flow. Second operand 7 states and 214 transitions. [2024-06-28 00:58:46,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 182 transitions, 1905 flow [2024-06-28 00:58:46,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 182 transitions, 1846 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-28 00:58:46,089 INFO L231 Difference]: Finished difference. Result has 135 places, 134 transitions, 1394 flow [2024-06-28 00:58:46,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1394, PETRI_PLACES=135, PETRI_TRANSITIONS=134} [2024-06-28 00:58:46,089 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 86 predicate places. [2024-06-28 00:58:46,089 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 134 transitions, 1394 flow [2024-06-28 00:58:46,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:46,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:46,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:46,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:58:46,090 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:46,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:46,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1072402759, now seen corresponding path program 4 times [2024-06-28 00:58:46,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:46,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125992939] [2024-06-28 00:58:46,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:46,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:46,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:46,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125992939] [2024-06-28 00:58:46,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125992939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:46,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:46,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:46,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068796130] [2024-06-28 00:58:46,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:46,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:46,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:46,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:46,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:46,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:46,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 134 transitions, 1394 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:46,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:46,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:46,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:46,680 INFO L124 PetriNetUnfolderBase]: 2312/3900 cut-off events. [2024-06-28 00:58:46,680 INFO L125 PetriNetUnfolderBase]: For 58094/58097 co-relation queries the response was YES. [2024-06-28 00:58:46,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19122 conditions, 3900 events. 2312/3900 cut-off events. For 58094/58097 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 25037 event pairs, 832 based on Foata normal form. 16/3872 useless extension candidates. Maximal degree in co-relation 19061. Up to 3133 conditions per place. [2024-06-28 00:58:46,710 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 126 selfloop transitions, 36 changer transitions 0/175 dead transitions. [2024-06-28 00:58:46,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 175 transitions, 1842 flow [2024-06-28 00:58:46,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:58:46,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:58:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-28 00:58:46,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-28 00:58:46,712 INFO L175 Difference]: Start difference. First operand has 135 places, 134 transitions, 1394 flow. Second operand 7 states and 205 transitions. [2024-06-28 00:58:46,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 175 transitions, 1842 flow [2024-06-28 00:58:46,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 175 transitions, 1779 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 00:58:46,788 INFO L231 Difference]: Finished difference. Result has 139 places, 135 transitions, 1434 flow [2024-06-28 00:58:46,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1434, PETRI_PLACES=139, PETRI_TRANSITIONS=135} [2024-06-28 00:58:46,788 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 90 predicate places. [2024-06-28 00:58:46,788 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 135 transitions, 1434 flow [2024-06-28 00:58:46,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:46,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:46,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:46,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:58:46,789 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:46,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:46,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1712853615, now seen corresponding path program 5 times [2024-06-28 00:58:46,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:46,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302607753] [2024-06-28 00:58:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:46,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:46,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:46,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302607753] [2024-06-28 00:58:46,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302607753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:46,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:46,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:46,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746335721] [2024-06-28 00:58:46,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:46,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:46,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:46,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:46,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:46,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:46,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 135 transitions, 1434 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:46,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:46,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:46,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:47,371 INFO L124 PetriNetUnfolderBase]: 2406/4054 cut-off events. [2024-06-28 00:58:47,371 INFO L125 PetriNetUnfolderBase]: For 61892/61895 co-relation queries the response was YES. [2024-06-28 00:58:47,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20030 conditions, 4054 events. 2406/4054 cut-off events. For 61892/61895 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 26159 event pairs, 848 based on Foata normal form. 16/4027 useless extension candidates. Maximal degree in co-relation 19967. Up to 3283 conditions per place. [2024-06-28 00:58:47,400 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 127 selfloop transitions, 39 changer transitions 0/179 dead transitions. [2024-06-28 00:58:47,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 179 transitions, 1898 flow [2024-06-28 00:58:47,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:58:47,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:58:47,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-28 00:58:47,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634920634920635 [2024-06-28 00:58:47,402 INFO L175 Difference]: Start difference. First operand has 139 places, 135 transitions, 1434 flow. Second operand 7 states and 209 transitions. [2024-06-28 00:58:47,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 179 transitions, 1898 flow [2024-06-28 00:58:47,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 179 transitions, 1819 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 00:58:47,559 INFO L231 Difference]: Finished difference. Result has 141 places, 136 transitions, 1464 flow [2024-06-28 00:58:47,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1355, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1464, PETRI_PLACES=141, PETRI_TRANSITIONS=136} [2024-06-28 00:58:47,560 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 92 predicate places. [2024-06-28 00:58:47,560 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 136 transitions, 1464 flow [2024-06-28 00:58:47,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:47,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:47,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:47,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:58:47,561 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:47,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:47,561 INFO L85 PathProgramCache]: Analyzing trace with hash -910861805, now seen corresponding path program 1 times [2024-06-28 00:58:47,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:47,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532695625] [2024-06-28 00:58:47,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:47,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:47,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:47,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532695625] [2024-06-28 00:58:47,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532695625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:47,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:47,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:47,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358881226] [2024-06-28 00:58:47,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:47,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:47,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:47,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:47,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:47,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:47,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 136 transitions, 1464 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:47,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:47,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:47,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:48,276 INFO L124 PetriNetUnfolderBase]: 2473/4025 cut-off events. [2024-06-28 00:58:48,277 INFO L125 PetriNetUnfolderBase]: For 64346/64349 co-relation queries the response was YES. [2024-06-28 00:58:48,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20478 conditions, 4025 events. 2473/4025 cut-off events. For 64346/64349 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25241 event pairs, 532 based on Foata normal form. 12/4031 useless extension candidates. Maximal degree in co-relation 20414. Up to 2963 conditions per place. [2024-06-28 00:58:48,311 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 127 selfloop transitions, 40 changer transitions 0/180 dead transitions. [2024-06-28 00:58:48,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 180 transitions, 1931 flow [2024-06-28 00:58:48,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:58:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:58:48,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-28 00:58:48,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-28 00:58:48,312 INFO L175 Difference]: Start difference. First operand has 141 places, 136 transitions, 1464 flow. Second operand 7 states and 207 transitions. [2024-06-28 00:58:48,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 180 transitions, 1931 flow [2024-06-28 00:58:48,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 180 transitions, 1844 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 00:58:48,408 INFO L231 Difference]: Finished difference. Result has 143 places, 137 transitions, 1487 flow [2024-06-28 00:58:48,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1377, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1487, PETRI_PLACES=143, PETRI_TRANSITIONS=137} [2024-06-28 00:58:48,408 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 94 predicate places. [2024-06-28 00:58:48,409 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 137 transitions, 1487 flow [2024-06-28 00:58:48,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:48,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:48,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:48,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:58:48,409 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:48,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:48,409 INFO L85 PathProgramCache]: Analyzing trace with hash -2023784879, now seen corresponding path program 1 times [2024-06-28 00:58:48,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:48,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624229166] [2024-06-28 00:58:48,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:48,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:48,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:48,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624229166] [2024-06-28 00:58:48,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624229166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:48,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:48,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:48,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710803599] [2024-06-28 00:58:48,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:48,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:48,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:48,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:48,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:48,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:48,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 137 transitions, 1487 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:48,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:48,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:48,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:48,976 INFO L124 PetriNetUnfolderBase]: 2495/4071 cut-off events. [2024-06-28 00:58:48,976 INFO L125 PetriNetUnfolderBase]: For 63632/63632 co-relation queries the response was YES. [2024-06-28 00:58:48,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20764 conditions, 4071 events. 2495/4071 cut-off events. For 63632/63632 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 25686 event pairs, 656 based on Foata normal form. 1/4063 useless extension candidates. Maximal degree in co-relation 20699. Up to 3709 conditions per place. [2024-06-28 00:58:49,006 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 136 selfloop transitions, 22 changer transitions 0/171 dead transitions. [2024-06-28 00:58:49,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 171 transitions, 2008 flow [2024-06-28 00:58:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:49,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-28 00:58:49,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6259259259259259 [2024-06-28 00:58:49,007 INFO L175 Difference]: Start difference. First operand has 143 places, 137 transitions, 1487 flow. Second operand 6 states and 169 transitions. [2024-06-28 00:58:49,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 171 transitions, 2008 flow [2024-06-28 00:58:49,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 171 transitions, 1917 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 00:58:49,100 INFO L231 Difference]: Finished difference. Result has 145 places, 146 transitions, 1551 flow [2024-06-28 00:58:49,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1551, PETRI_PLACES=145, PETRI_TRANSITIONS=146} [2024-06-28 00:58:49,101 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 96 predicate places. [2024-06-28 00:58:49,101 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 146 transitions, 1551 flow [2024-06-28 00:58:49,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:49,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:49,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:49,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:58:49,102 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:49,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:49,102 INFO L85 PathProgramCache]: Analyzing trace with hash -2042290647, now seen corresponding path program 6 times [2024-06-28 00:58:49,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:49,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436147905] [2024-06-28 00:58:49,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:49,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:49,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:49,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436147905] [2024-06-28 00:58:49,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436147905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:49,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:49,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:49,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810851070] [2024-06-28 00:58:49,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:49,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:49,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:49,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:49,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:49,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:49,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 146 transitions, 1551 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:49,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:49,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:49,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:49,729 INFO L124 PetriNetUnfolderBase]: 2467/4037 cut-off events. [2024-06-28 00:58:49,729 INFO L125 PetriNetUnfolderBase]: For 66430/66433 co-relation queries the response was YES. [2024-06-28 00:58:49,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20109 conditions, 4037 events. 2467/4037 cut-off events. For 66430/66433 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25423 event pairs, 580 based on Foata normal form. 18/4035 useless extension candidates. Maximal degree in co-relation 20042. Up to 3378 conditions per place. [2024-06-28 00:58:49,758 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 137 selfloop transitions, 34 changer transitions 0/184 dead transitions. [2024-06-28 00:58:49,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 184 transitions, 2011 flow [2024-06-28 00:58:49,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:58:49,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:58:49,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-28 00:58:49,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-06-28 00:58:49,760 INFO L175 Difference]: Start difference. First operand has 145 places, 146 transitions, 1551 flow. Second operand 7 states and 201 transitions. [2024-06-28 00:58:49,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 184 transitions, 2011 flow [2024-06-28 00:58:49,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 184 transitions, 1951 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-06-28 00:58:49,874 INFO L231 Difference]: Finished difference. Result has 151 places, 147 transitions, 1592 flow [2024-06-28 00:58:49,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1592, PETRI_PLACES=151, PETRI_TRANSITIONS=147} [2024-06-28 00:58:49,875 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 102 predicate places. [2024-06-28 00:58:49,875 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 147 transitions, 1592 flow [2024-06-28 00:58:49,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:49,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:49,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:49,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:58:49,876 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:49,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:49,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1955072733, now seen corresponding path program 2 times [2024-06-28 00:58:49,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:49,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484845913] [2024-06-28 00:58:49,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:49,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:49,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:49,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484845913] [2024-06-28 00:58:49,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484845913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:49,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:49,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:49,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149393161] [2024-06-28 00:58:49,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:49,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:49,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:49,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:49,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:50,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:50,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 147 transitions, 1592 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:50,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:50,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:50,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:50,505 INFO L124 PetriNetUnfolderBase]: 2447/4009 cut-off events. [2024-06-28 00:58:50,505 INFO L125 PetriNetUnfolderBase]: For 62739/62742 co-relation queries the response was YES. [2024-06-28 00:58:50,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19744 conditions, 4009 events. 2447/4009 cut-off events. For 62739/62742 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25279 event pairs, 545 based on Foata normal form. 14/4003 useless extension candidates. Maximal degree in co-relation 19675. Up to 3221 conditions per place. [2024-06-28 00:58:50,530 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 138 selfloop transitions, 36 changer transitions 0/187 dead transitions. [2024-06-28 00:58:50,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 187 transitions, 2044 flow [2024-06-28 00:58:50,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:58:50,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:58:50,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-28 00:58:50,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-06-28 00:58:50,532 INFO L175 Difference]: Start difference. First operand has 151 places, 147 transitions, 1592 flow. Second operand 7 states and 204 transitions. [2024-06-28 00:58:50,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 187 transitions, 2044 flow [2024-06-28 00:58:50,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 187 transitions, 1971 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 00:58:50,654 INFO L231 Difference]: Finished difference. Result has 153 places, 147 transitions, 1597 flow [2024-06-28 00:58:50,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1597, PETRI_PLACES=153, PETRI_TRANSITIONS=147} [2024-06-28 00:58:50,655 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 104 predicate places. [2024-06-28 00:58:50,655 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 147 transitions, 1597 flow [2024-06-28 00:58:50,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:50,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:50,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:50,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:58:50,656 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:50,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:50,656 INFO L85 PathProgramCache]: Analyzing trace with hash 501831661, now seen corresponding path program 3 times [2024-06-28 00:58:50,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:50,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692621239] [2024-06-28 00:58:50,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:50,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:50,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:50,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692621239] [2024-06-28 00:58:50,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692621239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:50,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:50,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:50,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6371797] [2024-06-28 00:58:50,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:50,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:50,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:50,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:50,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:50,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:50,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 147 transitions, 1597 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:50,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:50,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:50,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:51,258 INFO L124 PetriNetUnfolderBase]: 2427/4061 cut-off events. [2024-06-28 00:58:51,258 INFO L125 PetriNetUnfolderBase]: For 60790/60793 co-relation queries the response was YES. [2024-06-28 00:58:51,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19426 conditions, 4061 events. 2427/4061 cut-off events. For 60790/60793 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 26182 event pairs, 692 based on Foata normal form. 14/4030 useless extension candidates. Maximal degree in co-relation 19356. Up to 2470 conditions per place. [2024-06-28 00:58:51,290 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 130 selfloop transitions, 44 changer transitions 0/187 dead transitions. [2024-06-28 00:58:51,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 187 transitions, 1991 flow [2024-06-28 00:58:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:58:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:58:51,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-28 00:58:51,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 00:58:51,292 INFO L175 Difference]: Start difference. First operand has 153 places, 147 transitions, 1597 flow. Second operand 7 states and 203 transitions. [2024-06-28 00:58:51,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 187 transitions, 1991 flow [2024-06-28 00:58:51,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 187 transitions, 1830 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-28 00:58:51,392 INFO L231 Difference]: Finished difference. Result has 151 places, 146 transitions, 1468 flow [2024-06-28 00:58:51,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1468, PETRI_PLACES=151, PETRI_TRANSITIONS=146} [2024-06-28 00:58:51,393 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 102 predicate places. [2024-06-28 00:58:51,393 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 146 transitions, 1468 flow [2024-06-28 00:58:51,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:51,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:51,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:51,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:58:51,393 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:51,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:51,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1986424219, now seen corresponding path program 2 times [2024-06-28 00:58:51,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:51,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582659259] [2024-06-28 00:58:51,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:51,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:51,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:51,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:51,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582659259] [2024-06-28 00:58:51,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582659259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:51,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:51,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:51,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458566762] [2024-06-28 00:58:51,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:51,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:51,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:51,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:51,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:51,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:51,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 146 transitions, 1468 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:51,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:51,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:51,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:51,907 INFO L124 PetriNetUnfolderBase]: 2438/4090 cut-off events. [2024-06-28 00:58:51,907 INFO L125 PetriNetUnfolderBase]: For 56554/56554 co-relation queries the response was YES. [2024-06-28 00:58:51,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19108 conditions, 4090 events. 2438/4090 cut-off events. For 56554/56554 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 26406 event pairs, 904 based on Foata normal form. 1/4051 useless extension candidates. Maximal degree in co-relation 19039. Up to 3613 conditions per place. [2024-06-28 00:58:51,937 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 133 selfloop transitions, 25 changer transitions 0/171 dead transitions. [2024-06-28 00:58:51,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 171 transitions, 1938 flow [2024-06-28 00:58:51,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:58:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:58:51,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-06-28 00:58:51,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 00:58:51,941 INFO L175 Difference]: Start difference. First operand has 151 places, 146 transitions, 1468 flow. Second operand 5 states and 145 transitions. [2024-06-28 00:58:51,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 171 transitions, 1938 flow [2024-06-28 00:58:52,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 171 transitions, 1811 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 00:58:52,062 INFO L231 Difference]: Finished difference. Result has 150 places, 149 transitions, 1441 flow [2024-06-28 00:58:52,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1441, PETRI_PLACES=150, PETRI_TRANSITIONS=149} [2024-06-28 00:58:52,063 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 101 predicate places. [2024-06-28 00:58:52,063 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 149 transitions, 1441 flow [2024-06-28 00:58:52,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:52,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:52,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:52,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:58:52,064 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:52,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:52,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2139751777, now seen corresponding path program 3 times [2024-06-28 00:58:52,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:52,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947476736] [2024-06-28 00:58:52,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:52,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:52,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:52,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947476736] [2024-06-28 00:58:52,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947476736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:52,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:52,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:52,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798416439] [2024-06-28 00:58:52,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:52,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:52,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:52,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:52,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:52,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:52,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 149 transitions, 1441 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:52,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:52,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:52,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:52,678 INFO L124 PetriNetUnfolderBase]: 2435/4102 cut-off events. [2024-06-28 00:58:52,678 INFO L125 PetriNetUnfolderBase]: For 57236/57236 co-relation queries the response was YES. [2024-06-28 00:58:52,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18313 conditions, 4102 events. 2435/4102 cut-off events. For 57236/57236 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 26651 event pairs, 908 based on Foata normal form. 1/4062 useless extension candidates. Maximal degree in co-relation 18244. Up to 3624 conditions per place. [2024-06-28 00:58:52,706 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 135 selfloop transitions, 19 changer transitions 0/167 dead transitions. [2024-06-28 00:58:52,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 167 transitions, 1793 flow [2024-06-28 00:58:52,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:58:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:58:52,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-28 00:58:52,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6722222222222223 [2024-06-28 00:58:52,707 INFO L175 Difference]: Start difference. First operand has 150 places, 149 transitions, 1441 flow. Second operand 4 states and 121 transitions. [2024-06-28 00:58:52,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 167 transitions, 1793 flow [2024-06-28 00:58:52,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 167 transitions, 1711 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-28 00:58:52,830 INFO L231 Difference]: Finished difference. Result has 151 places, 149 transitions, 1413 flow [2024-06-28 00:58:52,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1359, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1413, PETRI_PLACES=151, PETRI_TRANSITIONS=149} [2024-06-28 00:58:52,830 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 102 predicate places. [2024-06-28 00:58:52,830 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 149 transitions, 1413 flow [2024-06-28 00:58:52,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:52,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:52,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:52,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:58:52,831 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:52,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:52,831 INFO L85 PathProgramCache]: Analyzing trace with hash 2131475913, now seen corresponding path program 1 times [2024-06-28 00:58:52,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:52,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058639187] [2024-06-28 00:58:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:52,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:52,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:52,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058639187] [2024-06-28 00:58:52,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058639187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:52,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:52,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:52,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964044774] [2024-06-28 00:58:52,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:52,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:52,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:52,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:52,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:52,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:58:52,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 149 transitions, 1413 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-28 00:58:52,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:52,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:58:52,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:53,459 INFO L124 PetriNetUnfolderBase]: 2298/3906 cut-off events. [2024-06-28 00:58:53,459 INFO L125 PetriNetUnfolderBase]: For 57026/57026 co-relation queries the response was YES. [2024-06-28 00:58:53,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17660 conditions, 3906 events. 2298/3906 cut-off events. For 57026/57026 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 25273 event pairs, 497 based on Foata normal form. 2/3902 useless extension candidates. Maximal degree in co-relation 17591. Up to 3333 conditions per place. [2024-06-28 00:58:53,501 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 132 selfloop transitions, 24 changer transitions 0/180 dead transitions. [2024-06-28 00:58:53,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 180 transitions, 1899 flow [2024-06-28 00:58:53,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:53,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:53,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-28 00:58:53,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-28 00:58:53,503 INFO L175 Difference]: Start difference. First operand has 151 places, 149 transitions, 1413 flow. Second operand 6 states and 172 transitions. [2024-06-28 00:58:53,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 180 transitions, 1899 flow [2024-06-28 00:58:53,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 180 transitions, 1861 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:58:53,617 INFO L231 Difference]: Finished difference. Result has 154 places, 155 transitions, 1487 flow [2024-06-28 00:58:53,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1487, PETRI_PLACES=154, PETRI_TRANSITIONS=155} [2024-06-28 00:58:53,617 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 105 predicate places. [2024-06-28 00:58:53,617 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 155 transitions, 1487 flow [2024-06-28 00:58:53,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-28 00:58:53,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:53,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:53,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:58:53,618 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:53,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:53,619 INFO L85 PathProgramCache]: Analyzing trace with hash 2131595883, now seen corresponding path program 2 times [2024-06-28 00:58:53,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:53,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038028265] [2024-06-28 00:58:53,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:53,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:53,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:53,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038028265] [2024-06-28 00:58:53,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038028265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:53,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:53,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:53,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915782846] [2024-06-28 00:58:53,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:53,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:53,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:53,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:53,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:53,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:58:53,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 155 transitions, 1487 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-28 00:58:53,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:53,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:58:53,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:54,277 INFO L124 PetriNetUnfolderBase]: 2343/3959 cut-off events. [2024-06-28 00:58:54,278 INFO L125 PetriNetUnfolderBase]: For 61445/61451 co-relation queries the response was YES. [2024-06-28 00:58:54,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18429 conditions, 3959 events. 2343/3959 cut-off events. For 61445/61451 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25623 event pairs, 763 based on Foata normal form. 8/3956 useless extension candidates. Maximal degree in co-relation 18359. Up to 3407 conditions per place. [2024-06-28 00:58:54,314 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 136 selfloop transitions, 24 changer transitions 0/184 dead transitions. [2024-06-28 00:58:54,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 184 transitions, 1936 flow [2024-06-28 00:58:54,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:54,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-28 00:58:54,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185185185185185 [2024-06-28 00:58:54,315 INFO L175 Difference]: Start difference. First operand has 154 places, 155 transitions, 1487 flow. Second operand 6 states and 167 transitions. [2024-06-28 00:58:54,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 184 transitions, 1936 flow [2024-06-28 00:58:54,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 184 transitions, 1883 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-28 00:58:54,457 INFO L231 Difference]: Finished difference. Result has 158 places, 163 transitions, 1576 flow [2024-06-28 00:58:54,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1443, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1576, PETRI_PLACES=158, PETRI_TRANSITIONS=163} [2024-06-28 00:58:54,458 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 109 predicate places. [2024-06-28 00:58:54,458 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 163 transitions, 1576 flow [2024-06-28 00:58:54,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-28 00:58:54,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:54,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:54,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:58:54,458 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:54,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:54,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2139520393, now seen corresponding path program 3 times [2024-06-28 00:58:54,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:54,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506395359] [2024-06-28 00:58:54,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:54,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:54,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:54,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506395359] [2024-06-28 00:58:54,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506395359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:54,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:54,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:54,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153297314] [2024-06-28 00:58:54,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:54,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:54,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:54,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:54,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:54,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:58:54,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 163 transitions, 1576 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-28 00:58:54,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:54,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:58:54,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:55,076 INFO L124 PetriNetUnfolderBase]: 2324/3969 cut-off events. [2024-06-28 00:58:55,076 INFO L125 PetriNetUnfolderBase]: For 63216/63222 co-relation queries the response was YES. [2024-06-28 00:58:55,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18367 conditions, 3969 events. 2324/3969 cut-off events. For 63216/63222 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 25971 event pairs, 801 based on Foata normal form. 8/3955 useless extension candidates. Maximal degree in co-relation 18295. Up to 3358 conditions per place. [2024-06-28 00:58:55,108 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 131 selfloop transitions, 29 changer transitions 0/184 dead transitions. [2024-06-28 00:58:55,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 184 transitions, 1946 flow [2024-06-28 00:58:55,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:58:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:58:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-28 00:58:55,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-28 00:58:55,109 INFO L175 Difference]: Start difference. First operand has 158 places, 163 transitions, 1576 flow. Second operand 5 states and 147 transitions. [2024-06-28 00:58:55,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 184 transitions, 1946 flow [2024-06-28 00:58:55,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 184 transitions, 1875 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-28 00:58:55,194 INFO L231 Difference]: Finished difference. Result has 160 places, 163 transitions, 1579 flow [2024-06-28 00:58:55,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1579, PETRI_PLACES=160, PETRI_TRANSITIONS=163} [2024-06-28 00:58:55,195 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 111 predicate places. [2024-06-28 00:58:55,195 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 163 transitions, 1579 flow [2024-06-28 00:58:55,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-28 00:58:55,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:55,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:55,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:58:55,195 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:55,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:55,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2139766657, now seen corresponding path program 1 times [2024-06-28 00:58:55,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:55,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621633343] [2024-06-28 00:58:55,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:55,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:55,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:55,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621633343] [2024-06-28 00:58:55,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621633343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:55,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:55,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:55,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746377514] [2024-06-28 00:58:55,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:55,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:55,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:55,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:55,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:55,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:55,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 163 transitions, 1579 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:55,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:55,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:55,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:55,726 INFO L124 PetriNetUnfolderBase]: 2490/4053 cut-off events. [2024-06-28 00:58:55,727 INFO L125 PetriNetUnfolderBase]: For 64319/64319 co-relation queries the response was YES. [2024-06-28 00:58:55,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19047 conditions, 4053 events. 2490/4053 cut-off events. For 64319/64319 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 25456 event pairs, 507 based on Foata normal form. 2/4047 useless extension candidates. Maximal degree in co-relation 18974. Up to 3725 conditions per place. [2024-06-28 00:58:55,757 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 155 selfloop transitions, 10 changer transitions 0/178 dead transitions. [2024-06-28 00:58:55,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 178 transitions, 1963 flow [2024-06-28 00:58:55,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:58:55,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:58:55,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-06-28 00:58:55,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277777777777778 [2024-06-28 00:58:55,758 INFO L175 Difference]: Start difference. First operand has 160 places, 163 transitions, 1579 flow. Second operand 4 states and 113 transitions. [2024-06-28 00:58:55,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 178 transitions, 1963 flow [2024-06-28 00:58:55,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 178 transitions, 1903 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-28 00:58:55,861 INFO L231 Difference]: Finished difference. Result has 160 places, 165 transitions, 1572 flow [2024-06-28 00:58:55,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1572, PETRI_PLACES=160, PETRI_TRANSITIONS=165} [2024-06-28 00:58:55,861 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 111 predicate places. [2024-06-28 00:58:55,862 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 165 transitions, 1572 flow [2024-06-28 00:58:55,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:55,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:55,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:55,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:58:55,862 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:55,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:55,863 INFO L85 PathProgramCache]: Analyzing trace with hash 443874179, now seen corresponding path program 1 times [2024-06-28 00:58:55,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:55,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836210589] [2024-06-28 00:58:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:55,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:55,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:55,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836210589] [2024-06-28 00:58:55,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836210589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:55,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:55,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:55,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621994117] [2024-06-28 00:58:55,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:55,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:55,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:55,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:55,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:56,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:56,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 165 transitions, 1572 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:56,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:56,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:56,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:56,463 INFO L124 PetriNetUnfolderBase]: 2548/4183 cut-off events. [2024-06-28 00:58:56,463 INFO L125 PetriNetUnfolderBase]: For 65898/65901 co-relation queries the response was YES. [2024-06-28 00:58:56,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19553 conditions, 4183 events. 2548/4183 cut-off events. For 65898/65901 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 26589 event pairs, 540 based on Foata normal form. 4/4173 useless extension candidates. Maximal degree in co-relation 19479. Up to 3464 conditions per place. [2024-06-28 00:58:56,495 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 144 selfloop transitions, 59 changer transitions 0/216 dead transitions. [2024-06-28 00:58:56,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 216 transitions, 2359 flow [2024-06-28 00:58:56,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:58:56,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:58:56,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-28 00:58:56,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2024-06-28 00:58:56,496 INFO L175 Difference]: Start difference. First operand has 160 places, 165 transitions, 1572 flow. Second operand 7 states and 206 transitions. [2024-06-28 00:58:56,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 216 transitions, 2359 flow [2024-06-28 00:58:56,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 216 transitions, 2322 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-28 00:58:56,636 INFO L231 Difference]: Finished difference. Result has 167 places, 181 transitions, 1872 flow [2024-06-28 00:58:56,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1535, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1872, PETRI_PLACES=167, PETRI_TRANSITIONS=181} [2024-06-28 00:58:56,637 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 118 predicate places. [2024-06-28 00:58:56,637 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 181 transitions, 1872 flow [2024-06-28 00:58:56,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:56,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:56,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:56,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:58:56,637 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:56,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:56,637 INFO L85 PathProgramCache]: Analyzing trace with hash 453139769, now seen corresponding path program 2 times [2024-06-28 00:58:56,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:56,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076949900] [2024-06-28 00:58:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:56,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:56,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:56,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076949900] [2024-06-28 00:58:56,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076949900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:56,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:56,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:56,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187970053] [2024-06-28 00:58:56,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:56,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:56,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:56,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:56,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:56,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:56,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 181 transitions, 1872 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:56,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:56,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:56,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:57,292 INFO L124 PetriNetUnfolderBase]: 2683/4378 cut-off events. [2024-06-28 00:58:57,293 INFO L125 PetriNetUnfolderBase]: For 74884/74887 co-relation queries the response was YES. [2024-06-28 00:58:57,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21813 conditions, 4378 events. 2683/4378 cut-off events. For 74884/74887 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 27945 event pairs, 520 based on Foata normal form. 4/4372 useless extension candidates. Maximal degree in co-relation 21736. Up to 3565 conditions per place. [2024-06-28 00:58:57,346 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 153 selfloop transitions, 67 changer transitions 0/233 dead transitions. [2024-06-28 00:58:57,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 233 transitions, 2799 flow [2024-06-28 00:58:57,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:58:57,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:58:57,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-28 00:58:57,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-28 00:58:57,348 INFO L175 Difference]: Start difference. First operand has 167 places, 181 transitions, 1872 flow. Second operand 7 states and 200 transitions. [2024-06-28 00:58:57,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 233 transitions, 2799 flow [2024-06-28 00:58:57,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 233 transitions, 2720 flow, removed 31 selfloop flow, removed 1 redundant places. [2024-06-28 00:58:57,515 INFO L231 Difference]: Finished difference. Result has 175 places, 200 transitions, 2203 flow [2024-06-28 00:58:57,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2203, PETRI_PLACES=175, PETRI_TRANSITIONS=200} [2024-06-28 00:58:57,516 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 126 predicate places. [2024-06-28 00:58:57,516 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 200 transitions, 2203 flow [2024-06-28 00:58:57,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:57,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:57,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:57,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:58:57,517 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:57,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:57,517 INFO L85 PathProgramCache]: Analyzing trace with hash 453128609, now seen corresponding path program 3 times [2024-06-28 00:58:57,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:57,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739848665] [2024-06-28 00:58:57,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:57,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:57,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:57,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739848665] [2024-06-28 00:58:57,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739848665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:57,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:57,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:57,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45383004] [2024-06-28 00:58:57,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:57,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:57,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:57,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:57,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:57,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:57,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 200 transitions, 2203 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:57,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:57,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:57,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:58,197 INFO L124 PetriNetUnfolderBase]: 2677/4366 cut-off events. [2024-06-28 00:58:58,197 INFO L125 PetriNetUnfolderBase]: For 76742/76745 co-relation queries the response was YES. [2024-06-28 00:58:58,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22138 conditions, 4366 events. 2677/4366 cut-off events. For 76742/76745 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 27806 event pairs, 523 based on Foata normal form. 4/4360 useless extension candidates. Maximal degree in co-relation 22057. Up to 3560 conditions per place. [2024-06-28 00:58:58,233 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 152 selfloop transitions, 68 changer transitions 0/233 dead transitions. [2024-06-28 00:58:58,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 233 transitions, 2912 flow [2024-06-28 00:58:58,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:58:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:58:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-28 00:58:58,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-06-28 00:58:58,234 INFO L175 Difference]: Start difference. First operand has 175 places, 200 transitions, 2203 flow. Second operand 7 states and 201 transitions. [2024-06-28 00:58:58,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 233 transitions, 2912 flow [2024-06-28 00:58:58,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 233 transitions, 2798 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-28 00:58:58,412 INFO L231 Difference]: Finished difference. Result has 182 places, 204 transitions, 2332 flow [2024-06-28 00:58:58,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2089, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2332, PETRI_PLACES=182, PETRI_TRANSITIONS=204} [2024-06-28 00:58:58,412 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 133 predicate places. [2024-06-28 00:58:58,413 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 204 transitions, 2332 flow [2024-06-28 00:58:58,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:58,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:58,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:58,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 00:58:58,413 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:58,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:58,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1833447477, now seen corresponding path program 4 times [2024-06-28 00:58:58,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:58,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224290378] [2024-06-28 00:58:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:58,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:58,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:58,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224290378] [2024-06-28 00:58:58,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224290378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:58,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:58,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:58,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957050437] [2024-06-28 00:58:58,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:58,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:58,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:58,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:58,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:58,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:58,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 204 transitions, 2332 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:58,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:58,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:58,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:59,084 INFO L124 PetriNetUnfolderBase]: 2699/4404 cut-off events. [2024-06-28 00:58:59,085 INFO L125 PetriNetUnfolderBase]: For 81424/81427 co-relation queries the response was YES. [2024-06-28 00:58:59,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22559 conditions, 4404 events. 2699/4404 cut-off events. For 81424/81427 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28157 event pairs, 522 based on Foata normal form. 4/4398 useless extension candidates. Maximal degree in co-relation 22475. Up to 3580 conditions per place. [2024-06-28 00:58:59,121 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 143 selfloop transitions, 84 changer transitions 0/240 dead transitions. [2024-06-28 00:58:59,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 240 transitions, 3070 flow [2024-06-28 00:58:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:59,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:59,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-28 00:58:59,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.674074074074074 [2024-06-28 00:58:59,123 INFO L175 Difference]: Start difference. First operand has 182 places, 204 transitions, 2332 flow. Second operand 6 states and 182 transitions. [2024-06-28 00:58:59,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 240 transitions, 3070 flow [2024-06-28 00:58:59,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 240 transitions, 2962 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-28 00:58:59,287 INFO L231 Difference]: Finished difference. Result has 185 places, 208 transitions, 2465 flow [2024-06-28 00:58:59,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2227, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2465, PETRI_PLACES=185, PETRI_TRANSITIONS=208} [2024-06-28 00:58:59,287 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 136 predicate places. [2024-06-28 00:58:59,287 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 208 transitions, 2465 flow [2024-06-28 00:58:59,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:59,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:59,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:59,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 00:58:59,288 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:58:59,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:59,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1833458637, now seen corresponding path program 5 times [2024-06-28 00:58:59,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:59,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686754546] [2024-06-28 00:58:59,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:59,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:59,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:59,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686754546] [2024-06-28 00:58:59,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686754546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:59,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:59,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:59,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955707754] [2024-06-28 00:58:59,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:59,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:59,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:59,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:59,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:59,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:58:59,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 208 transitions, 2465 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:59,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:59,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:58:59,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:59,943 INFO L124 PetriNetUnfolderBase]: 2751/4488 cut-off events. [2024-06-28 00:58:59,943 INFO L125 PetriNetUnfolderBase]: For 88015/88018 co-relation queries the response was YES. [2024-06-28 00:58:59,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23367 conditions, 4488 events. 2751/4488 cut-off events. For 88015/88018 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 28710 event pairs, 524 based on Foata normal form. 4/4482 useless extension candidates. Maximal degree in co-relation 23283. Up to 3628 conditions per place. [2024-06-28 00:58:59,982 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 150 selfloop transitions, 79 changer transitions 0/242 dead transitions. [2024-06-28 00:58:59,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 242 transitions, 3272 flow [2024-06-28 00:58:59,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:59,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:59,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-28 00:58:59,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-28 00:58:59,984 INFO L175 Difference]: Start difference. First operand has 185 places, 208 transitions, 2465 flow. Second operand 6 states and 175 transitions. [2024-06-28 00:58:59,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 242 transitions, 3272 flow [2024-06-28 00:59:00,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 242 transitions, 3106 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:00,240 INFO L231 Difference]: Finished difference. Result has 188 places, 216 transitions, 2644 flow [2024-06-28 00:59:00,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2314, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2644, PETRI_PLACES=188, PETRI_TRANSITIONS=216} [2024-06-28 00:59:00,241 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 139 predicate places. [2024-06-28 00:59:00,241 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 216 transitions, 2644 flow [2024-06-28 00:59:00,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:00,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:00,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:00,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 00:59:00,242 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:00,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:00,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1907796413, now seen corresponding path program 6 times [2024-06-28 00:59:00,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:00,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23751778] [2024-06-28 00:59:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:00,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:00,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:00,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23751778] [2024-06-28 00:59:00,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23751778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:00,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:00,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:00,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019744532] [2024-06-28 00:59:00,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:00,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:00,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:00,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:00,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:00,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:00,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 216 transitions, 2644 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:00,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:00,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:00,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:00,920 INFO L124 PetriNetUnfolderBase]: 2747/4480 cut-off events. [2024-06-28 00:59:00,920 INFO L125 PetriNetUnfolderBase]: For 87255/87258 co-relation queries the response was YES. [2024-06-28 00:59:00,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23402 conditions, 4480 events. 2747/4480 cut-off events. For 87255/87258 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 28646 event pairs, 524 based on Foata normal form. 4/4474 useless extension candidates. Maximal degree in co-relation 23317. Up to 3780 conditions per place. [2024-06-28 00:59:00,960 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 165 selfloop transitions, 66 changer transitions 0/244 dead transitions. [2024-06-28 00:59:00,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 244 transitions, 3252 flow [2024-06-28 00:59:00,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:59:00,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:59:00,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-28 00:59:00,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6977777777777778 [2024-06-28 00:59:00,961 INFO L175 Difference]: Start difference. First operand has 188 places, 216 transitions, 2644 flow. Second operand 5 states and 157 transitions. [2024-06-28 00:59:00,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 244 transitions, 3252 flow [2024-06-28 00:59:01,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 244 transitions, 3113 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-28 00:59:01,189 INFO L231 Difference]: Finished difference. Result has 191 places, 216 transitions, 2671 flow [2024-06-28 00:59:01,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2507, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2671, PETRI_PLACES=191, PETRI_TRANSITIONS=216} [2024-06-28 00:59:01,190 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 142 predicate places. [2024-06-28 00:59:01,190 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 216 transitions, 2671 flow [2024-06-28 00:59:01,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:01,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:01,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:01,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 00:59:01,191 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:01,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:01,192 INFO L85 PathProgramCache]: Analyzing trace with hash 984946890, now seen corresponding path program 1 times [2024-06-28 00:59:01,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:01,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685039506] [2024-06-28 00:59:01,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:01,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:01,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:01,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685039506] [2024-06-28 00:59:01,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685039506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:01,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:01,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:01,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663861288] [2024-06-28 00:59:01,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:01,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:01,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:01,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:01,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:01,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:01,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 216 transitions, 2671 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:01,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:01,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:01,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:01,864 INFO L124 PetriNetUnfolderBase]: 2797/4563 cut-off events. [2024-06-28 00:59:01,864 INFO L125 PetriNetUnfolderBase]: For 90455/90458 co-relation queries the response was YES. [2024-06-28 00:59:01,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23814 conditions, 4563 events. 2797/4563 cut-off events. For 90455/90458 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 29259 event pairs, 528 based on Foata normal form. 2/4554 useless extension candidates. Maximal degree in co-relation 23728. Up to 3675 conditions per place. [2024-06-28 00:59:01,907 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 188 selfloop transitions, 69 changer transitions 0/270 dead transitions. [2024-06-28 00:59:01,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 270 transitions, 3607 flow [2024-06-28 00:59:01,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:01,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-28 00:59:01,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2024-06-28 00:59:01,908 INFO L175 Difference]: Start difference. First operand has 191 places, 216 transitions, 2671 flow. Second operand 7 states and 206 transitions. [2024-06-28 00:59:01,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 270 transitions, 3607 flow [2024-06-28 00:59:02,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 270 transitions, 3423 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 00:59:02,168 INFO L231 Difference]: Finished difference. Result has 195 places, 234 transitions, 2850 flow [2024-06-28 00:59:02,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2491, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2850, PETRI_PLACES=195, PETRI_TRANSITIONS=234} [2024-06-28 00:59:02,169 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 146 predicate places. [2024-06-28 00:59:02,169 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 234 transitions, 2850 flow [2024-06-28 00:59:02,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:02,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:02,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:02,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 00:59:02,169 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:02,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:02,170 INFO L85 PathProgramCache]: Analyzing trace with hash 985067046, now seen corresponding path program 1 times [2024-06-28 00:59:02,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:02,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668296724] [2024-06-28 00:59:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:02,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:02,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:02,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668296724] [2024-06-28 00:59:02,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668296724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:02,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:02,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:02,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973627634] [2024-06-28 00:59:02,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:02,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:02,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:02,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:02,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:02,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:02,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 234 transitions, 2850 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:02,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:02,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:02,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:02,991 INFO L124 PetriNetUnfolderBase]: 2883/4705 cut-off events. [2024-06-28 00:59:02,991 INFO L125 PetriNetUnfolderBase]: For 97463/97466 co-relation queries the response was YES. [2024-06-28 00:59:03,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25631 conditions, 4705 events. 2883/4705 cut-off events. For 97463/97466 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30344 event pairs, 572 based on Foata normal form. 4/4688 useless extension candidates. Maximal degree in co-relation 25543. Up to 3756 conditions per place. [2024-06-28 00:59:03,034 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 169 selfloop transitions, 101 changer transitions 0/283 dead transitions. [2024-06-28 00:59:03,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 283 transitions, 3930 flow [2024-06-28 00:59:03,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:03,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:03,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-28 00:59:03,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 00:59:03,037 INFO L175 Difference]: Start difference. First operand has 195 places, 234 transitions, 2850 flow. Second operand 7 states and 203 transitions. [2024-06-28 00:59:03,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 283 transitions, 3930 flow [2024-06-28 00:59:03,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 283 transitions, 3854 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-28 00:59:03,271 INFO L231 Difference]: Finished difference. Result has 203 places, 251 transitions, 3344 flow [2024-06-28 00:59:03,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2778, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3344, PETRI_PLACES=203, PETRI_TRANSITIONS=251} [2024-06-28 00:59:03,271 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 154 predicate places. [2024-06-28 00:59:03,271 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 251 transitions, 3344 flow [2024-06-28 00:59:03,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:03,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:03,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:03,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 00:59:03,272 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:03,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:03,273 INFO L85 PathProgramCache]: Analyzing trace with hash 585576024, now seen corresponding path program 2 times [2024-06-28 00:59:03,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:03,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240703711] [2024-06-28 00:59:03,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:03,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:03,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:03,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240703711] [2024-06-28 00:59:03,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240703711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:03,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:03,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:03,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383294377] [2024-06-28 00:59:03,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:03,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:03,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:03,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:03,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:03,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:03,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 251 transitions, 3344 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:03,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:03,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:03,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:04,106 INFO L124 PetriNetUnfolderBase]: 2905/4723 cut-off events. [2024-06-28 00:59:04,106 INFO L125 PetriNetUnfolderBase]: For 102584/102587 co-relation queries the response was YES. [2024-06-28 00:59:04,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26504 conditions, 4723 events. 2905/4723 cut-off events. For 102584/102587 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 30363 event pairs, 511 based on Foata normal form. 4/4719 useless extension candidates. Maximal degree in co-relation 26411. Up to 4042 conditions per place. [2024-06-28 00:59:04,150 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 216 selfloop transitions, 56 changer transitions 0/285 dead transitions. [2024-06-28 00:59:04,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 285 transitions, 4000 flow [2024-06-28 00:59:04,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-28 00:59:04,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-28 00:59:04,151 INFO L175 Difference]: Start difference. First operand has 203 places, 251 transitions, 3344 flow. Second operand 7 states and 198 transitions. [2024-06-28 00:59:04,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 285 transitions, 4000 flow [2024-06-28 00:59:04,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 285 transitions, 3880 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-28 00:59:04,464 INFO L231 Difference]: Finished difference. Result has 208 places, 255 transitions, 3393 flow [2024-06-28 00:59:04,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3224, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3393, PETRI_PLACES=208, PETRI_TRANSITIONS=255} [2024-06-28 00:59:04,464 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 159 predicate places. [2024-06-28 00:59:04,464 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 255 transitions, 3393 flow [2024-06-28 00:59:04,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:04,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:04,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:04,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 00:59:04,465 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:04,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:04,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1162198566, now seen corresponding path program 2 times [2024-06-28 00:59:04,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:04,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456248835] [2024-06-28 00:59:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:04,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:04,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:04,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456248835] [2024-06-28 00:59:04,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456248835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:04,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:04,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:04,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971246124] [2024-06-28 00:59:04,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:04,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:04,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:04,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:04,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:04,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:04,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 255 transitions, 3393 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:04,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:04,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:04,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:05,194 INFO L124 PetriNetUnfolderBase]: 2927/4804 cut-off events. [2024-06-28 00:59:05,195 INFO L125 PetriNetUnfolderBase]: For 109444/109447 co-relation queries the response was YES. [2024-06-28 00:59:05,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26744 conditions, 4804 events. 2927/4804 cut-off events. For 109444/109447 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31329 event pairs, 572 based on Foata normal form. 4/4786 useless extension candidates. Maximal degree in co-relation 26650. Up to 3806 conditions per place. [2024-06-28 00:59:05,240 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 183 selfloop transitions, 93 changer transitions 0/289 dead transitions. [2024-06-28 00:59:05,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 289 transitions, 4334 flow [2024-06-28 00:59:05,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:05,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:05,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-28 00:59:05,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-28 00:59:05,242 INFO L175 Difference]: Start difference. First operand has 208 places, 255 transitions, 3393 flow. Second operand 7 states and 202 transitions. [2024-06-28 00:59:05,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 289 transitions, 4334 flow [2024-06-28 00:59:05,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 289 transitions, 4195 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:05,537 INFO L231 Difference]: Finished difference. Result has 209 places, 259 transitions, 3522 flow [2024-06-28 00:59:05,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3254, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3522, PETRI_PLACES=209, PETRI_TRANSITIONS=259} [2024-06-28 00:59:05,538 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 160 predicate places. [2024-06-28 00:59:05,538 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 259 transitions, 3522 flow [2024-06-28 00:59:05,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:05,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:05,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:05,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 00:59:05,538 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:05,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:05,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1162198380, now seen corresponding path program 3 times [2024-06-28 00:59:05,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:05,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513964243] [2024-06-28 00:59:05,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:05,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:05,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:05,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513964243] [2024-06-28 00:59:05,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513964243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:05,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:05,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:05,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615187136] [2024-06-28 00:59:05,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:05,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:05,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:05,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:05,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:05,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:05,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 259 transitions, 3522 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:05,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:05,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:05,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:06,310 INFO L124 PetriNetUnfolderBase]: 2977/4837 cut-off events. [2024-06-28 00:59:06,310 INFO L125 PetriNetUnfolderBase]: For 114610/114613 co-relation queries the response was YES. [2024-06-28 00:59:06,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27467 conditions, 4837 events. 2977/4837 cut-off events. For 114610/114613 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31280 event pairs, 511 based on Foata normal form. 4/4833 useless extension candidates. Maximal degree in co-relation 27373. Up to 4093 conditions per place. [2024-06-28 00:59:06,357 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 227 selfloop transitions, 58 changer transitions 0/298 dead transitions. [2024-06-28 00:59:06,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 298 transitions, 4348 flow [2024-06-28 00:59:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-28 00:59:06,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-28 00:59:06,358 INFO L175 Difference]: Start difference. First operand has 209 places, 259 transitions, 3522 flow. Second operand 8 states and 220 transitions. [2024-06-28 00:59:06,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 298 transitions, 4348 flow [2024-06-28 00:59:06,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 298 transitions, 4198 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 00:59:06,620 INFO L231 Difference]: Finished difference. Result has 215 places, 266 transitions, 3598 flow [2024-06-28 00:59:06,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3372, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3598, PETRI_PLACES=215, PETRI_TRANSITIONS=266} [2024-06-28 00:59:06,621 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 166 predicate places. [2024-06-28 00:59:06,621 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 266 transitions, 3598 flow [2024-06-28 00:59:06,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:06,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:06,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:06,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 00:59:06,621 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:06,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:06,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1162435716, now seen corresponding path program 3 times [2024-06-28 00:59:06,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:06,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760861402] [2024-06-28 00:59:06,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:06,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:06,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:06,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760861402] [2024-06-28 00:59:06,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760861402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:06,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:06,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:06,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538721704] [2024-06-28 00:59:06,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:06,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:06,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:06,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:06,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:06,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:06,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 266 transitions, 3598 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:06,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:06,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:06,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:07,350 INFO L124 PetriNetUnfolderBase]: 2971/4861 cut-off events. [2024-06-28 00:59:07,351 INFO L125 PetriNetUnfolderBase]: For 117614/117617 co-relation queries the response was YES. [2024-06-28 00:59:07,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27378 conditions, 4861 events. 2971/4861 cut-off events. For 117614/117617 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 31711 event pairs, 560 based on Foata normal form. 4/4843 useless extension candidates. Maximal degree in co-relation 27282. Up to 3869 conditions per place. [2024-06-28 00:59:07,399 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 189 selfloop transitions, 93 changer transitions 0/295 dead transitions. [2024-06-28 00:59:07,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 295 transitions, 4400 flow [2024-06-28 00:59:07,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:07,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-28 00:59:07,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-28 00:59:07,400 INFO L175 Difference]: Start difference. First operand has 215 places, 266 transitions, 3598 flow. Second operand 7 states and 200 transitions. [2024-06-28 00:59:07,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 295 transitions, 4400 flow [2024-06-28 00:59:07,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 295 transitions, 4195 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:07,715 INFO L231 Difference]: Finished difference. Result has 216 places, 266 transitions, 3589 flow [2024-06-28 00:59:07,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3393, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3589, PETRI_PLACES=216, PETRI_TRANSITIONS=266} [2024-06-28 00:59:07,716 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 167 predicate places. [2024-06-28 00:59:07,716 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 266 transitions, 3589 flow [2024-06-28 00:59:07,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:07,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:07,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:07,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 00:59:07,716 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:07,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:07,717 INFO L85 PathProgramCache]: Analyzing trace with hash 762953808, now seen corresponding path program 1 times [2024-06-28 00:59:07,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:07,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625944175] [2024-06-28 00:59:07,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:07,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:07,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:07,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625944175] [2024-06-28 00:59:07,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625944175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:07,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:07,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:07,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217115761] [2024-06-28 00:59:07,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:07,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:07,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:07,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:07,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:07,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:07,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 266 transitions, 3589 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:07,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:07,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:07,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:08,473 INFO L124 PetriNetUnfolderBase]: 2989/4870 cut-off events. [2024-06-28 00:59:08,474 INFO L125 PetriNetUnfolderBase]: For 120636/120636 co-relation queries the response was YES. [2024-06-28 00:59:08,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27610 conditions, 4870 events. 2989/4870 cut-off events. For 120636/120636 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31570 event pairs, 634 based on Foata normal form. 2/4856 useless extension candidates. Maximal degree in co-relation 27515. Up to 4353 conditions per place. [2024-06-28 00:59:08,520 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 256 selfloop transitions, 27 changer transitions 0/296 dead transitions. [2024-06-28 00:59:08,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 296 transitions, 4259 flow [2024-06-28 00:59:08,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:08,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-28 00:59:08,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-28 00:59:08,521 INFO L175 Difference]: Start difference. First operand has 216 places, 266 transitions, 3589 flow. Second operand 7 states and 190 transitions. [2024-06-28 00:59:08,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 296 transitions, 4259 flow [2024-06-28 00:59:08,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 296 transitions, 4095 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 00:59:08,841 INFO L231 Difference]: Finished difference. Result has 218 places, 268 transitions, 3528 flow [2024-06-28 00:59:08,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3425, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3528, PETRI_PLACES=218, PETRI_TRANSITIONS=268} [2024-06-28 00:59:08,842 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 169 predicate places. [2024-06-28 00:59:08,842 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 268 transitions, 3528 flow [2024-06-28 00:59:08,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:08,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:08,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:08,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 00:59:08,843 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:08,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:08,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1843785664, now seen corresponding path program 4 times [2024-06-28 00:59:08,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:08,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318947721] [2024-06-28 00:59:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:08,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:08,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:08,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318947721] [2024-06-28 00:59:08,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318947721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:08,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:08,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:08,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6799996] [2024-06-28 00:59:08,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:08,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:08,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:08,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:08,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:08,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:08,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 268 transitions, 3528 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:08,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:08,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:08,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:09,598 INFO L124 PetriNetUnfolderBase]: 3014/4945 cut-off events. [2024-06-28 00:59:09,598 INFO L125 PetriNetUnfolderBase]: For 128699/128699 co-relation queries the response was YES. [2024-06-28 00:59:09,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27785 conditions, 4945 events. 3014/4945 cut-off events. For 128699/128699 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 32465 event pairs, 569 based on Foata normal form. 1/4919 useless extension candidates. Maximal degree in co-relation 27689. Up to 3905 conditions per place. [2024-06-28 00:59:09,645 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 196 selfloop transitions, 103 changer transitions 0/312 dead transitions. [2024-06-28 00:59:09,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 312 transitions, 4632 flow [2024-06-28 00:59:09,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-28 00:59:09,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-06-28 00:59:09,646 INFO L175 Difference]: Start difference. First operand has 218 places, 268 transitions, 3528 flow. Second operand 7 states and 204 transitions. [2024-06-28 00:59:09,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 312 transitions, 4632 flow [2024-06-28 00:59:09,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 312 transitions, 4545 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 00:59:09,940 INFO L231 Difference]: Finished difference. Result has 220 places, 279 transitions, 3815 flow [2024-06-28 00:59:09,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3441, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3815, PETRI_PLACES=220, PETRI_TRANSITIONS=279} [2024-06-28 00:59:09,941 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 171 predicate places. [2024-06-28 00:59:09,941 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 279 transitions, 3815 flow [2024-06-28 00:59:09,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:09,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:09,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:09,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 00:59:09,942 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:09,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:09,943 INFO L85 PathProgramCache]: Analyzing trace with hash 751095188, now seen corresponding path program 5 times [2024-06-28 00:59:09,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:09,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448891134] [2024-06-28 00:59:09,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:09,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:10,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:10,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448891134] [2024-06-28 00:59:10,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448891134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:10,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:10,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:10,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923667908] [2024-06-28 00:59:10,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:10,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:10,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:10,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:10,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:10,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:10,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 279 transitions, 3815 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:10,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:10,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:10,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:10,717 INFO L124 PetriNetUnfolderBase]: 3025/4935 cut-off events. [2024-06-28 00:59:10,717 INFO L125 PetriNetUnfolderBase]: For 133856/133856 co-relation queries the response was YES. [2024-06-28 00:59:10,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28420 conditions, 4935 events. 3025/4935 cut-off events. For 133856/133856 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 32090 event pairs, 571 based on Foata normal form. 1/4912 useless extension candidates. Maximal degree in co-relation 28323. Up to 3913 conditions per place. [2024-06-28 00:59:10,770 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 201 selfloop transitions, 102 changer transitions 0/316 dead transitions. [2024-06-28 00:59:10,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 316 transitions, 4921 flow [2024-06-28 00:59:10,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:10,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:10,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-28 00:59:10,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-28 00:59:10,772 INFO L175 Difference]: Start difference. First operand has 220 places, 279 transitions, 3815 flow. Second operand 7 states and 205 transitions. [2024-06-28 00:59:10,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 316 transitions, 4921 flow [2024-06-28 00:59:11,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 316 transitions, 4811 flow, removed 37 selfloop flow, removed 1 redundant places. [2024-06-28 00:59:11,191 INFO L231 Difference]: Finished difference. Result has 226 places, 282 transitions, 3969 flow [2024-06-28 00:59:11,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3713, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3969, PETRI_PLACES=226, PETRI_TRANSITIONS=282} [2024-06-28 00:59:11,192 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 177 predicate places. [2024-06-28 00:59:11,192 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 282 transitions, 3969 flow [2024-06-28 00:59:11,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:11,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:11,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:11,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 00:59:11,193 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:11,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:11,193 INFO L85 PathProgramCache]: Analyzing trace with hash -590234260, now seen corresponding path program 6 times [2024-06-28 00:59:11,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:11,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619426385] [2024-06-28 00:59:11,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:11,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:11,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:11,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619426385] [2024-06-28 00:59:11,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619426385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:11,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:11,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:11,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751793182] [2024-06-28 00:59:11,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:11,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:11,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:11,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:11,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:11,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:11,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 282 transitions, 3969 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:11,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:11,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:11,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:11,983 INFO L124 PetriNetUnfolderBase]: 3022/4929 cut-off events. [2024-06-28 00:59:11,984 INFO L125 PetriNetUnfolderBase]: For 137239/137239 co-relation queries the response was YES. [2024-06-28 00:59:12,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28745 conditions, 4929 events. 3022/4929 cut-off events. For 137239/137239 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 32153 event pairs, 547 based on Foata normal form. 1/4912 useless extension candidates. Maximal degree in co-relation 28645. Up to 4210 conditions per place. [2024-06-28 00:59:12,035 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 239 selfloop transitions, 58 changer transitions 0/310 dead transitions. [2024-06-28 00:59:12,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 310 transitions, 4651 flow [2024-06-28 00:59:12,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:12,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:12,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-28 00:59:12,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158730158730159 [2024-06-28 00:59:12,037 INFO L175 Difference]: Start difference. First operand has 226 places, 282 transitions, 3969 flow. Second operand 7 states and 194 transitions. [2024-06-28 00:59:12,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 310 transitions, 4651 flow [2024-06-28 00:59:12,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 310 transitions, 4459 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:12,454 INFO L231 Difference]: Finished difference. Result has 229 places, 283 transitions, 3927 flow [2024-06-28 00:59:12,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3780, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3927, PETRI_PLACES=229, PETRI_TRANSITIONS=283} [2024-06-28 00:59:12,455 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 180 predicate places. [2024-06-28 00:59:12,455 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 283 transitions, 3927 flow [2024-06-28 00:59:12,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:12,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:12,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:12,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 00:59:12,456 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:12,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:12,457 INFO L85 PathProgramCache]: Analyzing trace with hash -590234074, now seen corresponding path program 4 times [2024-06-28 00:59:12,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:12,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712048957] [2024-06-28 00:59:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:12,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:12,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:12,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712048957] [2024-06-28 00:59:12,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712048957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:12,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:12,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:12,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224575240] [2024-06-28 00:59:12,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:12,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:12,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:12,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:12,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:12,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:12,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 283 transitions, 3927 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:12,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:12,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:12,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:13,218 INFO L124 PetriNetUnfolderBase]: 3017/4926 cut-off events. [2024-06-28 00:59:13,218 INFO L125 PetriNetUnfolderBase]: For 139917/139917 co-relation queries the response was YES. [2024-06-28 00:59:13,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28374 conditions, 4926 events. 3017/4926 cut-off events. For 139917/139917 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 32074 event pairs, 595 based on Foata normal form. 1/4899 useless extension candidates. Maximal degree in co-relation 28274. Up to 3935 conditions per place. [2024-06-28 00:59:13,275 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 188 selfloop transitions, 111 changer transitions 0/312 dead transitions. [2024-06-28 00:59:13,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 312 transitions, 4783 flow [2024-06-28 00:59:13,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:13,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:13,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-28 00:59:13,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317460317460317 [2024-06-28 00:59:13,276 INFO L175 Difference]: Start difference. First operand has 229 places, 283 transitions, 3927 flow. Second operand 7 states and 199 transitions. [2024-06-28 00:59:13,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 312 transitions, 4783 flow [2024-06-28 00:59:13,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 312 transitions, 4629 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:13,634 INFO L231 Difference]: Finished difference. Result has 232 places, 283 transitions, 4001 flow [2024-06-28 00:59:13,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3773, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4001, PETRI_PLACES=232, PETRI_TRANSITIONS=283} [2024-06-28 00:59:13,635 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 183 predicate places. [2024-06-28 00:59:13,635 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 283 transitions, 4001 flow [2024-06-28 00:59:13,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:13,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:13,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:13,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 00:59:13,635 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:13,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:13,635 INFO L85 PathProgramCache]: Analyzing trace with hash -351025240, now seen corresponding path program 7 times [2024-06-28 00:59:13,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:13,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956555838] [2024-06-28 00:59:13,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:13,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:13,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:13,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956555838] [2024-06-28 00:59:13,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956555838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:13,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:13,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:13,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220439551] [2024-06-28 00:59:13,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:13,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:13,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:13,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:13,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:13,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:13,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 283 transitions, 4001 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:13,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:13,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:13,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:14,376 INFO L124 PetriNetUnfolderBase]: 3028/4944 cut-off events. [2024-06-28 00:59:14,376 INFO L125 PetriNetUnfolderBase]: For 145402/145402 co-relation queries the response was YES. [2024-06-28 00:59:14,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28794 conditions, 4944 events. 3028/4944 cut-off events. For 145402/145402 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 32208 event pairs, 571 based on Foata normal form. 1/4921 useless extension candidates. Maximal degree in co-relation 28693. Up to 3912 conditions per place. [2024-06-28 00:59:14,426 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 192 selfloop transitions, 111 changer transitions 0/316 dead transitions. [2024-06-28 00:59:14,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 316 transitions, 4917 flow [2024-06-28 00:59:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:14,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-28 00:59:14,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-06-28 00:59:14,427 INFO L175 Difference]: Start difference. First operand has 232 places, 283 transitions, 4001 flow. Second operand 7 states and 201 transitions. [2024-06-28 00:59:14,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 316 transitions, 4917 flow [2024-06-28 00:59:14,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 316 transitions, 4375 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-28 00:59:14,780 INFO L231 Difference]: Finished difference. Result has 228 places, 287 transitions, 3735 flow [2024-06-28 00:59:14,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3459, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3735, PETRI_PLACES=228, PETRI_TRANSITIONS=287} [2024-06-28 00:59:14,781 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 179 predicate places. [2024-06-28 00:59:14,781 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 287 transitions, 3735 flow [2024-06-28 00:59:14,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:14,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:14,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:14,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 00:59:14,781 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:14,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:14,782 INFO L85 PathProgramCache]: Analyzing trace with hash -235555324, now seen corresponding path program 5 times [2024-06-28 00:59:14,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:14,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141985328] [2024-06-28 00:59:14,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:14,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:14,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:14,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141985328] [2024-06-28 00:59:14,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141985328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:14,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:14,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:14,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420795384] [2024-06-28 00:59:14,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:14,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:14,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:14,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:14,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:14,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:14,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 287 transitions, 3735 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:14,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:14,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:14,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:15,600 INFO L124 PetriNetUnfolderBase]: 3039/5025 cut-off events. [2024-06-28 00:59:15,601 INFO L125 PetriNetUnfolderBase]: For 143376/143376 co-relation queries the response was YES. [2024-06-28 00:59:15,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28571 conditions, 5025 events. 3039/5025 cut-off events. For 143376/143376 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33125 event pairs, 986 based on Foata normal form. 1/4992 useless extension candidates. Maximal degree in co-relation 28470. Up to 4437 conditions per place. [2024-06-28 00:59:15,652 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 277 selfloop transitions, 25 changer transitions 0/315 dead transitions. [2024-06-28 00:59:15,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 315 transitions, 4457 flow [2024-06-28 00:59:15,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:15,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-28 00:59:15,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5936507936507937 [2024-06-28 00:59:15,653 INFO L175 Difference]: Start difference. First operand has 228 places, 287 transitions, 3735 flow. Second operand 7 states and 187 transitions. [2024-06-28 00:59:15,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 315 transitions, 4457 flow [2024-06-28 00:59:16,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 315 transitions, 4276 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 00:59:16,081 INFO L231 Difference]: Finished difference. Result has 233 places, 291 transitions, 3686 flow [2024-06-28 00:59:16,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3556, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3686, PETRI_PLACES=233, PETRI_TRANSITIONS=291} [2024-06-28 00:59:16,082 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 184 predicate places. [2024-06-28 00:59:16,082 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 291 transitions, 3686 flow [2024-06-28 00:59:16,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:16,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:16,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:16,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 00:59:16,083 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:16,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:16,083 INFO L85 PathProgramCache]: Analyzing trace with hash -235971220, now seen corresponding path program 8 times [2024-06-28 00:59:16,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:16,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991042104] [2024-06-28 00:59:16,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:16,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:16,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:16,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991042104] [2024-06-28 00:59:16,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991042104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:16,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:16,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:16,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167284289] [2024-06-28 00:59:16,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:16,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:16,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:16,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:16,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:16,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:16,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 291 transitions, 3686 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:16,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:16,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:16,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:16,877 INFO L124 PetriNetUnfolderBase]: 3075/5137 cut-off events. [2024-06-28 00:59:16,877 INFO L125 PetriNetUnfolderBase]: For 150869/150869 co-relation queries the response was YES. [2024-06-28 00:59:16,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28692 conditions, 5137 events. 3075/5137 cut-off events. For 150869/150869 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34187 event pairs, 648 based on Foata normal form. 1/5113 useless extension candidates. Maximal degree in co-relation 28589. Up to 4239 conditions per place. [2024-06-28 00:59:16,939 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 244 selfloop transitions, 75 changer transitions 0/332 dead transitions. [2024-06-28 00:59:16,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 332 transitions, 4645 flow [2024-06-28 00:59:16,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:59:16,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:59:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-28 00:59:16,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5950617283950618 [2024-06-28 00:59:16,940 INFO L175 Difference]: Start difference. First operand has 233 places, 291 transitions, 3686 flow. Second operand 9 states and 241 transitions. [2024-06-28 00:59:16,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 332 transitions, 4645 flow [2024-06-28 00:59:17,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 332 transitions, 4569 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:17,335 INFO L231 Difference]: Finished difference. Result has 240 places, 301 transitions, 3948 flow [2024-06-28 00:59:17,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3610, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3948, PETRI_PLACES=240, PETRI_TRANSITIONS=301} [2024-06-28 00:59:17,336 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 191 predicate places. [2024-06-28 00:59:17,336 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 301 transitions, 3948 flow [2024-06-28 00:59:17,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:17,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:17,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:17,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 00:59:17,337 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:17,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:17,337 INFO L85 PathProgramCache]: Analyzing trace with hash -235734070, now seen corresponding path program 9 times [2024-06-28 00:59:17,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:17,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827517481] [2024-06-28 00:59:17,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:17,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:17,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:17,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827517481] [2024-06-28 00:59:17,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827517481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:17,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:17,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:17,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773699372] [2024-06-28 00:59:17,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:17,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:17,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:17,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:17,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:17,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:17,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 301 transitions, 3948 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:17,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:17,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:17,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:18,132 INFO L124 PetriNetUnfolderBase]: 3072/5004 cut-off events. [2024-06-28 00:59:18,132 INFO L125 PetriNetUnfolderBase]: For 153308/153308 co-relation queries the response was YES. [2024-06-28 00:59:18,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28925 conditions, 5004 events. 3072/5004 cut-off events. For 153308/153308 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32585 event pairs, 547 based on Foata normal form. 1/4987 useless extension candidates. Maximal degree in co-relation 28819. Up to 4236 conditions per place. [2024-06-28 00:59:18,182 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 238 selfloop transitions, 74 changer transitions 0/325 dead transitions. [2024-06-28 00:59:18,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 325 transitions, 4626 flow [2024-06-28 00:59:18,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:18,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-28 00:59:18,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158730158730159 [2024-06-28 00:59:18,183 INFO L175 Difference]: Start difference. First operand has 240 places, 301 transitions, 3948 flow. Second operand 7 states and 194 transitions. [2024-06-28 00:59:18,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 325 transitions, 4626 flow [2024-06-28 00:59:18,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 325 transitions, 4468 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:18,671 INFO L231 Difference]: Finished difference. Result has 243 places, 301 transitions, 3944 flow [2024-06-28 00:59:18,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3790, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3944, PETRI_PLACES=243, PETRI_TRANSITIONS=301} [2024-06-28 00:59:18,672 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 194 predicate places. [2024-06-28 00:59:18,672 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 301 transitions, 3944 flow [2024-06-28 00:59:18,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:18,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:18,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:18,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 00:59:18,672 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:18,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:18,673 INFO L85 PathProgramCache]: Analyzing trace with hash -235971034, now seen corresponding path program 6 times [2024-06-28 00:59:18,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:18,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843036858] [2024-06-28 00:59:18,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:18,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:18,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:18,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843036858] [2024-06-28 00:59:18,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843036858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:18,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:18,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:18,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790701071] [2024-06-28 00:59:18,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:18,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:18,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:18,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:18,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:18,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:18,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 301 transitions, 3944 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:18,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:18,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:18,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:19,418 INFO L124 PetriNetUnfolderBase]: 3083/5076 cut-off events. [2024-06-28 00:59:19,418 INFO L125 PetriNetUnfolderBase]: For 160467/160467 co-relation queries the response was YES. [2024-06-28 00:59:19,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29119 conditions, 5076 events. 3083/5076 cut-off events. For 160467/160467 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33530 event pairs, 593 based on Foata normal form. 1/5044 useless extension candidates. Maximal degree in co-relation 29013. Up to 4000 conditions per place. [2024-06-28 00:59:19,469 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 198 selfloop transitions, 118 changer transitions 0/329 dead transitions. [2024-06-28 00:59:19,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 329 transitions, 4780 flow [2024-06-28 00:59:19,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:19,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:19,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-28 00:59:19,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6253968253968254 [2024-06-28 00:59:19,470 INFO L175 Difference]: Start difference. First operand has 243 places, 301 transitions, 3944 flow. Second operand 7 states and 197 transitions. [2024-06-28 00:59:19,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 329 transitions, 4780 flow [2024-06-28 00:59:19,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 329 transitions, 4632 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:19,978 INFO L231 Difference]: Finished difference. Result has 244 places, 304 transitions, 4080 flow [2024-06-28 00:59:19,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3796, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4080, PETRI_PLACES=244, PETRI_TRANSITIONS=304} [2024-06-28 00:59:19,978 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 195 predicate places. [2024-06-28 00:59:19,979 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 304 transitions, 4080 flow [2024-06-28 00:59:19,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:19,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:19,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:19,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 00:59:19,979 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:19,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:19,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1387345886, now seen corresponding path program 7 times [2024-06-28 00:59:19,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:19,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553496658] [2024-06-28 00:59:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:19,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:20,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:20,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553496658] [2024-06-28 00:59:20,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553496658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:20,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:20,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:20,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962840810] [2024-06-28 00:59:20,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:20,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:20,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:20,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:20,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:20,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:20,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 304 transitions, 4080 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:20,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:20,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:20,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:20,774 INFO L124 PetriNetUnfolderBase]: 3105/5032 cut-off events. [2024-06-28 00:59:20,774 INFO L125 PetriNetUnfolderBase]: For 163702/163705 co-relation queries the response was YES. [2024-06-28 00:59:20,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29600 conditions, 5032 events. 3105/5032 cut-off events. For 163702/163705 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 32698 event pairs, 520 based on Foata normal form. 4/5026 useless extension candidates. Maximal degree in co-relation 29493. Up to 4020 conditions per place. [2024-06-28 00:59:20,826 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 215 selfloop transitions, 106 changer transitions 0/334 dead transitions. [2024-06-28 00:59:20,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 334 transitions, 5057 flow [2024-06-28 00:59:20,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:59:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:59:20,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-28 00:59:20,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-28 00:59:20,827 INFO L175 Difference]: Start difference. First operand has 244 places, 304 transitions, 4080 flow. Second operand 6 states and 175 transitions. [2024-06-28 00:59:20,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 334 transitions, 5057 flow [2024-06-28 00:59:21,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 334 transitions, 4862 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:21,316 INFO L231 Difference]: Finished difference. Result has 246 places, 308 transitions, 4175 flow [2024-06-28 00:59:21,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3889, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4175, PETRI_PLACES=246, PETRI_TRANSITIONS=308} [2024-06-28 00:59:21,317 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 197 predicate places. [2024-06-28 00:59:21,317 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 308 transitions, 4175 flow [2024-06-28 00:59:21,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:21,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:21,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:21,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 00:59:21,317 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:21,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:21,318 INFO L85 PathProgramCache]: Analyzing trace with hash -982134656, now seen corresponding path program 8 times [2024-06-28 00:59:21,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:21,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229738608] [2024-06-28 00:59:21,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:21,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:21,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:21,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229738608] [2024-06-28 00:59:21,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229738608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:21,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:21,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:21,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087472625] [2024-06-28 00:59:21,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:21,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:21,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:21,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:21,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:21,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:21,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 308 transitions, 4175 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:21,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:21,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:21,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:22,106 INFO L124 PetriNetUnfolderBase]: 3102/5098 cut-off events. [2024-06-28 00:59:22,106 INFO L125 PetriNetUnfolderBase]: For 167107/167107 co-relation queries the response was YES. [2024-06-28 00:59:22,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29720 conditions, 5098 events. 3102/5098 cut-off events. For 167107/167107 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 33463 event pairs, 573 based on Foata normal form. 1/5088 useless extension candidates. Maximal degree in co-relation 29612. Up to 4234 conditions per place. [2024-06-28 00:59:22,164 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 250 selfloop transitions, 82 changer transitions 0/345 dead transitions. [2024-06-28 00:59:22,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 345 transitions, 5037 flow [2024-06-28 00:59:22,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:22,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:22,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-28 00:59:22,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634920634920635 [2024-06-28 00:59:22,165 INFO L175 Difference]: Start difference. First operand has 246 places, 308 transitions, 4175 flow. Second operand 7 states and 209 transitions. [2024-06-28 00:59:22,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 345 transitions, 5037 flow [2024-06-28 00:59:22,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 345 transitions, 4860 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:22,811 INFO L231 Difference]: Finished difference. Result has 249 places, 308 transitions, 4188 flow [2024-06-28 00:59:22,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4000, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4188, PETRI_PLACES=249, PETRI_TRANSITIONS=308} [2024-06-28 00:59:22,811 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 200 predicate places. [2024-06-28 00:59:22,811 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 308 transitions, 4188 flow [2024-06-28 00:59:22,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:22,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:22,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:22,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 00:59:22,812 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:22,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:22,812 INFO L85 PathProgramCache]: Analyzing trace with hash -987848576, now seen corresponding path program 9 times [2024-06-28 00:59:22,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:22,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497094197] [2024-06-28 00:59:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:22,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:22,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:22,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497094197] [2024-06-28 00:59:22,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497094197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:22,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:22,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:22,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229042230] [2024-06-28 00:59:22,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:22,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:22,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:22,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:22,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:22,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:22,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 308 transitions, 4188 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:22,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:22,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:22,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:23,600 INFO L124 PetriNetUnfolderBase]: 3094/5052 cut-off events. [2024-06-28 00:59:23,601 INFO L125 PetriNetUnfolderBase]: For 166059/166062 co-relation queries the response was YES. [2024-06-28 00:59:23,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29427 conditions, 5052 events. 3094/5052 cut-off events. For 166059/166062 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 33158 event pairs, 544 based on Foata normal form. 4/5035 useless extension candidates. Maximal degree in co-relation 29319. Up to 4226 conditions per place. [2024-06-28 00:59:23,659 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 246 selfloop transitions, 73 changer transitions 0/332 dead transitions. [2024-06-28 00:59:23,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 332 transitions, 4884 flow [2024-06-28 00:59:23,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:59:23,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:59:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-28 00:59:23,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-28 00:59:23,660 INFO L175 Difference]: Start difference. First operand has 249 places, 308 transitions, 4188 flow. Second operand 5 states and 153 transitions. [2024-06-28 00:59:23,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 332 transitions, 4884 flow [2024-06-28 00:59:24,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 332 transitions, 4656 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:24,211 INFO L231 Difference]: Finished difference. Result has 248 places, 308 transitions, 4136 flow [2024-06-28 00:59:24,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3960, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4136, PETRI_PLACES=248, PETRI_TRANSITIONS=308} [2024-06-28 00:59:24,211 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 199 predicate places. [2024-06-28 00:59:24,212 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 308 transitions, 4136 flow [2024-06-28 00:59:24,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:24,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:24,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:24,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 00:59:24,212 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:24,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:24,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1210451516, now seen corresponding path program 10 times [2024-06-28 00:59:24,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:24,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117343798] [2024-06-28 00:59:24,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:24,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:24,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:24,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117343798] [2024-06-28 00:59:24,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117343798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:24,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:24,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:24,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109685518] [2024-06-28 00:59:24,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:24,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:24,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:24,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:24,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:24,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:24,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 308 transitions, 4136 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:24,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:24,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:24,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:25,067 INFO L124 PetriNetUnfolderBase]: 3091/5042 cut-off events. [2024-06-28 00:59:25,068 INFO L125 PetriNetUnfolderBase]: For 157951/157951 co-relation queries the response was YES. [2024-06-28 00:59:25,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29192 conditions, 5042 events. 3091/5042 cut-off events. For 157951/157951 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 32935 event pairs, 595 based on Foata normal form. 1/5015 useless extension candidates. Maximal degree in co-relation 29084. Up to 4008 conditions per place. [2024-06-28 00:59:25,124 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 196 selfloop transitions, 124 changer transitions 0/333 dead transitions. [2024-06-28 00:59:25,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 333 transitions, 4942 flow [2024-06-28 00:59:25,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:59:25,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:59:25,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-28 00:59:25,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-28 00:59:25,125 INFO L175 Difference]: Start difference. First operand has 248 places, 308 transitions, 4136 flow. Second operand 6 states and 175 transitions. [2024-06-28 00:59:25,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 333 transitions, 4942 flow [2024-06-28 00:59:25,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 333 transitions, 4740 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:25,608 INFO L231 Difference]: Finished difference. Result has 248 places, 308 transitions, 4198 flow [2024-06-28 00:59:25,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3936, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4198, PETRI_PLACES=248, PETRI_TRANSITIONS=308} [2024-06-28 00:59:25,609 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 199 predicate places. [2024-06-28 00:59:25,609 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 308 transitions, 4198 flow [2024-06-28 00:59:25,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:25,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:25,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:25,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 00:59:25,610 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:25,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:25,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1210214552, now seen corresponding path program 10 times [2024-06-28 00:59:25,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:25,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960656092] [2024-06-28 00:59:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:25,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:25,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:25,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960656092] [2024-06-28 00:59:25,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960656092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:25,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:25,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:25,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405066408] [2024-06-28 00:59:25,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:25,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:25,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:25,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:25,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:25,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:25,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 308 transitions, 4198 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:25,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:25,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:25,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:26,482 INFO L124 PetriNetUnfolderBase]: 3102/5092 cut-off events. [2024-06-28 00:59:26,482 INFO L125 PetriNetUnfolderBase]: For 160911/160911 co-relation queries the response was YES. [2024-06-28 00:59:26,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29462 conditions, 5092 events. 3102/5092 cut-off events. For 160911/160911 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 33568 event pairs, 554 based on Foata normal form. 1/5073 useless extension candidates. Maximal degree in co-relation 29355. Up to 4060 conditions per place. [2024-06-28 00:59:26,534 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 217 selfloop transitions, 116 changer transitions 0/346 dead transitions. [2024-06-28 00:59:26,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 346 transitions, 5202 flow [2024-06-28 00:59:26,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:26,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-28 00:59:26,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2024-06-28 00:59:26,536 INFO L175 Difference]: Start difference. First operand has 248 places, 308 transitions, 4198 flow. Second operand 7 states and 206 transitions. [2024-06-28 00:59:26,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 346 transitions, 5202 flow [2024-06-28 00:59:27,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 346 transitions, 4926 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:27,008 INFO L231 Difference]: Finished difference. Result has 250 places, 311 transitions, 4252 flow [2024-06-28 00:59:27,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3930, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4252, PETRI_PLACES=250, PETRI_TRANSITIONS=311} [2024-06-28 00:59:27,009 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 201 predicate places. [2024-06-28 00:59:27,009 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 311 transitions, 4252 flow [2024-06-28 00:59:27,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:27,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:27,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:27,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 00:59:27,010 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:27,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:27,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1387583222, now seen corresponding path program 11 times [2024-06-28 00:59:27,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:27,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160070065] [2024-06-28 00:59:27,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:27,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:27,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:27,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160070065] [2024-06-28 00:59:27,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160070065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:27,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:27,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:27,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441051117] [2024-06-28 00:59:27,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:27,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:27,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:27,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:27,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:27,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:27,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 311 transitions, 4252 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:27,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:27,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:27,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:27,874 INFO L124 PetriNetUnfolderBase]: 3096/5027 cut-off events. [2024-06-28 00:59:27,874 INFO L125 PetriNetUnfolderBase]: For 150911/150914 co-relation queries the response was YES. [2024-06-28 00:59:27,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29221 conditions, 5027 events. 3096/5027 cut-off events. For 150911/150914 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 32824 event pairs, 511 based on Foata normal form. 4/5025 useless extension candidates. Maximal degree in co-relation 29114. Up to 4055 conditions per place. [2024-06-28 00:59:27,918 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 233 selfloop transitions, 108 changer transitions 0/354 dead transitions. [2024-06-28 00:59:27,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 354 transitions, 5142 flow [2024-06-28 00:59:27,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:27,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-28 00:59:27,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-28 00:59:27,920 INFO L175 Difference]: Start difference. First operand has 250 places, 311 transitions, 4252 flow. Second operand 8 states and 234 transitions. [2024-06-28 00:59:27,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 354 transitions, 5142 flow [2024-06-28 00:59:28,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 354 transitions, 4892 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-28 00:59:28,349 INFO L231 Difference]: Finished difference. Result has 251 places, 311 transitions, 4244 flow [2024-06-28 00:59:28,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4006, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4244, PETRI_PLACES=251, PETRI_TRANSITIONS=311} [2024-06-28 00:59:28,350 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 202 predicate places. [2024-06-28 00:59:28,350 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 311 transitions, 4244 flow [2024-06-28 00:59:28,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:28,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:28,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:28,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 00:59:28,350 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:28,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:28,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1387583036, now seen corresponding path program 11 times [2024-06-28 00:59:28,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:28,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442808121] [2024-06-28 00:59:28,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:28,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:28,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:28,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442808121] [2024-06-28 00:59:28,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442808121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:28,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:28,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:28,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370312452] [2024-06-28 00:59:28,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:28,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:28,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:28,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:28,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:28,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:28,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 311 transitions, 4244 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:28,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:28,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:28,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:29,237 INFO L124 PetriNetUnfolderBase]: 3088/5069 cut-off events. [2024-06-28 00:59:29,237 INFO L125 PetriNetUnfolderBase]: For 146595/146598 co-relation queries the response was YES. [2024-06-28 00:59:29,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29083 conditions, 5069 events. 3088/5069 cut-off events. For 146595/146598 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 33436 event pairs, 570 based on Foata normal form. 4/5051 useless extension candidates. Maximal degree in co-relation 28977. Up to 4007 conditions per place. [2024-06-28 00:59:29,290 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 210 selfloop transitions, 115 changer transitions 0/338 dead transitions. [2024-06-28 00:59:29,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 338 transitions, 4958 flow [2024-06-28 00:59:29,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:59:29,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:59:29,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-28 00:59:29,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-28 00:59:29,291 INFO L175 Difference]: Start difference. First operand has 251 places, 311 transitions, 4244 flow. Second operand 6 states and 177 transitions. [2024-06-28 00:59:29,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 338 transitions, 4958 flow [2024-06-28 00:59:29,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 338 transitions, 4682 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 00:59:29,775 INFO L231 Difference]: Finished difference. Result has 250 places, 311 transitions, 4215 flow [2024-06-28 00:59:29,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3968, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4215, PETRI_PLACES=250, PETRI_TRANSITIONS=311} [2024-06-28 00:59:29,775 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 201 predicate places. [2024-06-28 00:59:29,775 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 311 transitions, 4215 flow [2024-06-28 00:59:29,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:29,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:29,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:29,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 00:59:29,776 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:29,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:29,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1007051958, now seen corresponding path program 12 times [2024-06-28 00:59:29,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:29,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795007858] [2024-06-28 00:59:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:29,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:29,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:29,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795007858] [2024-06-28 00:59:29,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795007858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:29,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:29,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:29,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374374784] [2024-06-28 00:59:29,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:29,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:29,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:29,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:29,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:29,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:29,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 311 transitions, 4215 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:29,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:29,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:29,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:30,576 INFO L124 PetriNetUnfolderBase]: 3085/5053 cut-off events. [2024-06-28 00:59:30,576 INFO L125 PetriNetUnfolderBase]: For 139906/139906 co-relation queries the response was YES. [2024-06-28 00:59:30,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28896 conditions, 5053 events. 3085/5053 cut-off events. For 139906/139906 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 33198 event pairs, 546 based on Foata normal form. 1/5036 useless extension candidates. Maximal degree in co-relation 28789. Up to 4042 conditions per place. [2024-06-28 00:59:30,632 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 225 selfloop transitions, 119 changer transitions 0/357 dead transitions. [2024-06-28 00:59:30,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 357 transitions, 5113 flow [2024-06-28 00:59:30,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:59:30,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:59:30,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 259 transitions. [2024-06-28 00:59:30,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6395061728395062 [2024-06-28 00:59:30,633 INFO L175 Difference]: Start difference. First operand has 250 places, 311 transitions, 4215 flow. Second operand 9 states and 259 transitions. [2024-06-28 00:59:30,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 357 transitions, 5113 flow [2024-06-28 00:59:31,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 357 transitions, 4751 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-28 00:59:31,306 INFO L231 Difference]: Finished difference. Result has 251 places, 311 transitions, 4113 flow [2024-06-28 00:59:31,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3857, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4113, PETRI_PLACES=251, PETRI_TRANSITIONS=311} [2024-06-28 00:59:31,307 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 202 predicate places. [2024-06-28 00:59:31,307 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 311 transitions, 4113 flow [2024-06-28 00:59:31,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:31,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:31,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:31,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 00:59:31,308 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:31,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:31,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1387336958, now seen corresponding path program 2 times [2024-06-28 00:59:31,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:31,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517549233] [2024-06-28 00:59:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:31,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:31,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:31,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517549233] [2024-06-28 00:59:31,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517549233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:31,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:31,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:31,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258737141] [2024-06-28 00:59:31,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:31,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:31,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:31,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:31,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:31,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:31,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 311 transitions, 4113 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:31,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:31,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:31,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:32,139 INFO L124 PetriNetUnfolderBase]: 3103/5186 cut-off events. [2024-06-28 00:59:32,140 INFO L125 PetriNetUnfolderBase]: For 136186/136186 co-relation queries the response was YES. [2024-06-28 00:59:32,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28985 conditions, 5186 events. 3103/5186 cut-off events. For 136186/136186 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 34835 event pairs, 990 based on Foata normal form. 2/5132 useless extension candidates. Maximal degree in co-relation 28879. Up to 4496 conditions per place. [2024-06-28 00:59:32,195 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 296 selfloop transitions, 29 changer transitions 0/338 dead transitions. [2024-06-28 00:59:32,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 338 transitions, 4865 flow [2024-06-28 00:59:32,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:59:32,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:59:32,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-28 00:59:32,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185185185185185 [2024-06-28 00:59:32,196 INFO L175 Difference]: Start difference. First operand has 251 places, 311 transitions, 4113 flow. Second operand 6 states and 167 transitions. [2024-06-28 00:59:32,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 338 transitions, 4865 flow [2024-06-28 00:59:32,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 338 transitions, 4617 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-28 00:59:32,615 INFO L231 Difference]: Finished difference. Result has 248 places, 313 transitions, 3979 flow [2024-06-28 00:59:32,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3865, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3979, PETRI_PLACES=248, PETRI_TRANSITIONS=313} [2024-06-28 00:59:32,615 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 199 predicate places. [2024-06-28 00:59:32,615 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 313 transitions, 3979 flow [2024-06-28 00:59:32,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:32,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:32,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:32,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 00:59:32,616 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:32,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:32,616 INFO L85 PathProgramCache]: Analyzing trace with hash -987839648, now seen corresponding path program 3 times [2024-06-28 00:59:32,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:32,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259080138] [2024-06-28 00:59:32,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:32,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:32,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:32,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259080138] [2024-06-28 00:59:32,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259080138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:32,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:32,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:32,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070916847] [2024-06-28 00:59:32,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:32,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:32,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:32,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:32,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:32,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:32,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 313 transitions, 3979 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:32,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:32,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:32,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:33,428 INFO L124 PetriNetUnfolderBase]: 3121/5220 cut-off events. [2024-06-28 00:59:33,428 INFO L125 PetriNetUnfolderBase]: For 128304/128304 co-relation queries the response was YES. [2024-06-28 00:59:33,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28685 conditions, 5220 events. 3121/5220 cut-off events. For 128304/128304 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 35112 event pairs, 1014 based on Foata normal form. 2/5159 useless extension candidates. Maximal degree in co-relation 28579. Up to 4550 conditions per place. [2024-06-28 00:59:33,480 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 303 selfloop transitions, 21 changer transitions 0/337 dead transitions. [2024-06-28 00:59:33,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 337 transitions, 4727 flow [2024-06-28 00:59:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:59:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:59:33,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-28 00:59:33,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-28 00:59:33,481 INFO L175 Difference]: Start difference. First operand has 248 places, 313 transitions, 3979 flow. Second operand 5 states and 144 transitions. [2024-06-28 00:59:33,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 337 transitions, 4727 flow [2024-06-28 00:59:33,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 337 transitions, 4629 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:33,801 INFO L231 Difference]: Finished difference. Result has 249 places, 315 transitions, 3980 flow [2024-06-28 00:59:33,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3885, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3980, PETRI_PLACES=249, PETRI_TRANSITIONS=315} [2024-06-28 00:59:33,802 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 200 predicate places. [2024-06-28 00:59:33,802 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 315 transitions, 3980 flow [2024-06-28 00:59:33,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:33,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:33,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:33,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 00:59:33,802 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:33,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:33,802 INFO L85 PathProgramCache]: Analyzing trace with hash -973554848, now seen corresponding path program 4 times [2024-06-28 00:59:33,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:33,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217409186] [2024-06-28 00:59:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:33,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:33,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:33,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217409186] [2024-06-28 00:59:33,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217409186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:33,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:33,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:33,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729840661] [2024-06-28 00:59:33,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:33,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:33,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:33,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:33,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:33,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:33,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 315 transitions, 3980 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:33,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:33,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:33,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:34,580 INFO L124 PetriNetUnfolderBase]: 3116/5063 cut-off events. [2024-06-28 00:59:34,580 INFO L125 PetriNetUnfolderBase]: For 121844/121844 co-relation queries the response was YES. [2024-06-28 00:59:34,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28206 conditions, 5063 events. 3116/5063 cut-off events. For 121844/121844 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 33158 event pairs, 651 based on Foata normal form. 2/5047 useless extension candidates. Maximal degree in co-relation 28099. Up to 4511 conditions per place. [2024-06-28 00:59:34,635 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 305 selfloop transitions, 25 changer transitions 0/343 dead transitions. [2024-06-28 00:59:34,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 343 transitions, 4748 flow [2024-06-28 00:59:34,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:59:34,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:59:34,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-28 00:59:34,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 00:59:34,637 INFO L175 Difference]: Start difference. First operand has 249 places, 315 transitions, 3980 flow. Second operand 6 states and 168 transitions. [2024-06-28 00:59:34,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 343 transitions, 4748 flow [2024-06-28 00:59:34,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 343 transitions, 4669 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-28 00:59:34,974 INFO L231 Difference]: Finished difference. Result has 252 places, 317 transitions, 4008 flow [2024-06-28 00:59:34,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3901, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4008, PETRI_PLACES=252, PETRI_TRANSITIONS=317} [2024-06-28 00:59:34,974 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 203 predicate places. [2024-06-28 00:59:34,974 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 317 transitions, 4008 flow [2024-06-28 00:59:34,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:34,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:34,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:34,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 00:59:34,975 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:34,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:34,975 INFO L85 PathProgramCache]: Analyzing trace with hash -353873272, now seen corresponding path program 1 times [2024-06-28 00:59:34,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:34,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977347834] [2024-06-28 00:59:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:34,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:35,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:35,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977347834] [2024-06-28 00:59:35,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977347834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:35,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:35,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:35,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405584991] [2024-06-28 00:59:35,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:35,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:35,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:35,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:35,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:35,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:59:35,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 317 transitions, 4008 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:35,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:35,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:59:35,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:35,952 INFO L124 PetriNetUnfolderBase]: 3065/5052 cut-off events. [2024-06-28 00:59:35,953 INFO L125 PetriNetUnfolderBase]: For 141044/141044 co-relation queries the response was YES. [2024-06-28 00:59:35,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28597 conditions, 5052 events. 3065/5052 cut-off events. For 141044/141044 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33433 event pairs, 449 based on Foata normal form. 8/5055 useless extension candidates. Maximal degree in co-relation 28489. Up to 4055 conditions per place. [2024-06-28 00:59:36,015 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 267 selfloop transitions, 41 changer transitions 0/357 dead transitions. [2024-06-28 00:59:36,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 357 transitions, 4864 flow [2024-06-28 00:59:36,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:36,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:36,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-28 00:59:36,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 00:59:36,016 INFO L175 Difference]: Start difference. First operand has 252 places, 317 transitions, 4008 flow. Second operand 7 states and 203 transitions. [2024-06-28 00:59:36,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 357 transitions, 4864 flow [2024-06-28 00:59:36,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 357 transitions, 4773 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:36,505 INFO L231 Difference]: Finished difference. Result has 255 places, 319 transitions, 4033 flow [2024-06-28 00:59:36,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3917, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4033, PETRI_PLACES=255, PETRI_TRANSITIONS=319} [2024-06-28 00:59:36,506 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 206 predicate places. [2024-06-28 00:59:36,506 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 319 transitions, 4033 flow [2024-06-28 00:59:36,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:36,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:36,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:36,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 00:59:36,507 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:36,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:36,507 INFO L85 PathProgramCache]: Analyzing trace with hash -351016312, now seen corresponding path program 2 times [2024-06-28 00:59:36,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:36,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632219432] [2024-06-28 00:59:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:36,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:36,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:36,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632219432] [2024-06-28 00:59:36,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632219432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:36,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:36,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:36,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459299710] [2024-06-28 00:59:36,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:36,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:36,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:36,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:36,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:36,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:59:36,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 319 transitions, 4033 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:36,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:36,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:59:36,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:37,443 INFO L124 PetriNetUnfolderBase]: 3118/5271 cut-off events. [2024-06-28 00:59:37,443 INFO L125 PetriNetUnfolderBase]: For 150973/150985 co-relation queries the response was YES. [2024-06-28 00:59:37,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29250 conditions, 5271 events. 3118/5271 cut-off events. For 150973/150985 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 36045 event pairs, 941 based on Foata normal form. 21/5252 useless extension candidates. Maximal degree in co-relation 29141. Up to 4286 conditions per place. [2024-06-28 00:59:37,497 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 263 selfloop transitions, 39 changer transitions 0/351 dead transitions. [2024-06-28 00:59:37,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 351 transitions, 4741 flow [2024-06-28 00:59:37,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:37,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-28 00:59:37,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6253968253968254 [2024-06-28 00:59:37,498 INFO L175 Difference]: Start difference. First operand has 255 places, 319 transitions, 4033 flow. Second operand 7 states and 197 transitions. [2024-06-28 00:59:37,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 351 transitions, 4741 flow [2024-06-28 00:59:37,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 351 transitions, 4690 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 00:59:37,908 INFO L231 Difference]: Finished difference. Result has 259 places, 320 transitions, 4084 flow [2024-06-28 00:59:37,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3982, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4084, PETRI_PLACES=259, PETRI_TRANSITIONS=320} [2024-06-28 00:59:37,909 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 210 predicate places. [2024-06-28 00:59:37,909 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 320 transitions, 4084 flow [2024-06-28 00:59:37,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:37,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:37,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:37,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 00:59:37,909 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:37,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:37,912 INFO L85 PathProgramCache]: Analyzing trace with hash -235725142, now seen corresponding path program 3 times [2024-06-28 00:59:37,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:37,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67560536] [2024-06-28 00:59:37,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:37,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:38,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:38,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67560536] [2024-06-28 00:59:38,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67560536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:38,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:38,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:38,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667563510] [2024-06-28 00:59:38,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:38,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:38,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:38,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:38,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:38,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:59:38,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 320 transitions, 4084 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:38,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:38,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:59:38,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:38,834 INFO L124 PetriNetUnfolderBase]: 3199/5398 cut-off events. [2024-06-28 00:59:38,834 INFO L125 PetriNetUnfolderBase]: For 157864/157876 co-relation queries the response was YES. [2024-06-28 00:59:38,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30150 conditions, 5398 events. 3199/5398 cut-off events. For 157864/157876 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 37062 event pairs, 981 based on Foata normal form. 22/5375 useless extension candidates. Maximal degree in co-relation 30039. Up to 4424 conditions per place. [2024-06-28 00:59:38,892 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 273 selfloop transitions, 27 changer transitions 0/349 dead transitions. [2024-06-28 00:59:38,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 349 transitions, 4782 flow [2024-06-28 00:59:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:38,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:38,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-28 00:59:38,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126984126984127 [2024-06-28 00:59:38,893 INFO L175 Difference]: Start difference. First operand has 259 places, 320 transitions, 4084 flow. Second operand 7 states and 193 transitions. [2024-06-28 00:59:38,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 349 transitions, 4782 flow [2024-06-28 00:59:39,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 349 transitions, 4704 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 00:59:39,305 INFO L231 Difference]: Finished difference. Result has 261 places, 321 transitions, 4086 flow [2024-06-28 00:59:39,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4006, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4086, PETRI_PLACES=261, PETRI_TRANSITIONS=321} [2024-06-28 00:59:39,305 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 212 predicate places. [2024-06-28 00:59:39,305 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 321 transitions, 4086 flow [2024-06-28 00:59:39,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:39,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:39,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:39,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 00:59:39,306 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:39,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:39,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1970698300, now seen corresponding path program 1 times [2024-06-28 00:59:39,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:39,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223297925] [2024-06-28 00:59:39,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:39,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:39,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:39,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223297925] [2024-06-28 00:59:39,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223297925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:39,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:39,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:39,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632673389] [2024-06-28 00:59:39,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:39,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:39,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:39,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:39,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:39,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:39,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 321 transitions, 4086 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:39,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:39,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:39,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:40,317 INFO L124 PetriNetUnfolderBase]: 3421/5672 cut-off events. [2024-06-28 00:59:40,317 INFO L125 PetriNetUnfolderBase]: For 152411/152411 co-relation queries the response was YES. [2024-06-28 00:59:40,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31456 conditions, 5672 events. 3421/5672 cut-off events. For 152411/152411 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 38528 event pairs, 1118 based on Foata normal form. 2/5629 useless extension candidates. Maximal degree in co-relation 31344. Up to 4993 conditions per place. [2024-06-28 00:59:40,383 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 311 selfloop transitions, 24 changer transitions 0/348 dead transitions. [2024-06-28 00:59:40,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 348 transitions, 4840 flow [2024-06-28 00:59:40,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:40,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:40,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-28 00:59:40,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5936507936507937 [2024-06-28 00:59:40,384 INFO L175 Difference]: Start difference. First operand has 261 places, 321 transitions, 4086 flow. Second operand 7 states and 187 transitions. [2024-06-28 00:59:40,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 348 transitions, 4840 flow [2024-06-28 00:59:40,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 348 transitions, 4784 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 00:59:40,863 INFO L231 Difference]: Finished difference. Result has 263 places, 323 transitions, 4115 flow [2024-06-28 00:59:40,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4030, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4115, PETRI_PLACES=263, PETRI_TRANSITIONS=323} [2024-06-28 00:59:40,863 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 214 predicate places. [2024-06-28 00:59:40,864 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 323 transitions, 4115 flow [2024-06-28 00:59:40,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:40,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:40,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:40,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 00:59:40,864 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:40,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:40,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1210205624, now seen corresponding path program 4 times [2024-06-28 00:59:40,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:40,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062675076] [2024-06-28 00:59:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:40,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:40,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:40,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062675076] [2024-06-28 00:59:40,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062675076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:40,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:40,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:40,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959486054] [2024-06-28 00:59:40,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:40,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:40,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:40,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:40,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:41,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:59:41,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 323 transitions, 4115 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:41,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:41,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:59:41,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:41,783 INFO L124 PetriNetUnfolderBase]: 3194/5391 cut-off events. [2024-06-28 00:59:41,784 INFO L125 PetriNetUnfolderBase]: For 152447/152459 co-relation queries the response was YES. [2024-06-28 00:59:41,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29744 conditions, 5391 events. 3194/5391 cut-off events. For 152447/152459 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 36717 event pairs, 839 based on Foata normal form. 22/5391 useless extension candidates. Maximal degree in co-relation 29631. Up to 4285 conditions per place. [2024-06-28 00:59:41,841 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 268 selfloop transitions, 37 changer transitions 0/354 dead transitions. [2024-06-28 00:59:41,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 354 transitions, 4815 flow [2024-06-28 00:59:41,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:59:41,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:59:41,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-28 00:59:41,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-28 00:59:41,842 INFO L175 Difference]: Start difference. First operand has 263 places, 323 transitions, 4115 flow. Second operand 6 states and 177 transitions. [2024-06-28 00:59:41,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 354 transitions, 4815 flow [2024-06-28 00:59:42,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 354 transitions, 4744 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 00:59:42,242 INFO L231 Difference]: Finished difference. Result has 264 places, 323 transitions, 4131 flow [2024-06-28 00:59:42,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4044, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4131, PETRI_PLACES=264, PETRI_TRANSITIONS=323} [2024-06-28 00:59:42,243 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 215 predicate places. [2024-06-28 00:59:42,243 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 323 transitions, 4131 flow [2024-06-28 00:59:42,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:42,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:42,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:42,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 00:59:42,244 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:42,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:42,245 INFO L85 PathProgramCache]: Analyzing trace with hash 372482864, now seen corresponding path program 2 times [2024-06-28 00:59:42,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:42,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237106140] [2024-06-28 00:59:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:42,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:42,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:42,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237106140] [2024-06-28 00:59:42,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237106140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:42,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:42,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:42,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522626345] [2024-06-28 00:59:42,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:42,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:42,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:42,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:42,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:42,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:42,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 323 transitions, 4131 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:42,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:42,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:42,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:43,080 INFO L124 PetriNetUnfolderBase]: 3416/5499 cut-off events. [2024-06-28 00:59:43,080 INFO L125 PetriNetUnfolderBase]: For 144413/144413 co-relation queries the response was YES. [2024-06-28 00:59:43,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30978 conditions, 5499 events. 3416/5499 cut-off events. For 144413/144413 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 36189 event pairs, 541 based on Foata normal form. 2/5497 useless extension candidates. Maximal degree in co-relation 30864. Up to 4972 conditions per place. [2024-06-28 00:59:43,138 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 307 selfloop transitions, 24 changer transitions 0/344 dead transitions. [2024-06-28 00:59:43,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 344 transitions, 4869 flow [2024-06-28 00:59:43,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:59:43,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:59:43,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-06-28 00:59:43,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-06-28 00:59:43,140 INFO L175 Difference]: Start difference. First operand has 264 places, 323 transitions, 4131 flow. Second operand 5 states and 141 transitions. [2024-06-28 00:59:43,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 344 transitions, 4869 flow [2024-06-28 00:59:43,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 344 transitions, 4787 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 00:59:43,728 INFO L231 Difference]: Finished difference. Result has 264 places, 325 transitions, 4141 flow [2024-06-28 00:59:43,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4049, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4141, PETRI_PLACES=264, PETRI_TRANSITIONS=325} [2024-06-28 00:59:43,728 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 215 predicate places. [2024-06-28 00:59:43,728 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 325 transitions, 4141 flow [2024-06-28 00:59:43,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:43,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:43,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:43,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 00:59:43,729 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:43,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:43,729 INFO L85 PathProgramCache]: Analyzing trace with hash -973548896, now seen corresponding path program 3 times [2024-06-28 00:59:43,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:43,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399746993] [2024-06-28 00:59:43,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:43,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:43,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:43,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399746993] [2024-06-28 00:59:43,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399746993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:43,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:43,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:43,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831380197] [2024-06-28 00:59:43,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:43,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:43,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:43,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:43,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:43,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:43,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 325 transitions, 4141 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:43,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:43,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:43,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:44,556 INFO L124 PetriNetUnfolderBase]: 3411/5513 cut-off events. [2024-06-28 00:59:44,556 INFO L125 PetriNetUnfolderBase]: For 141598/141601 co-relation queries the response was YES. [2024-06-28 00:59:44,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30798 conditions, 5513 events. 3411/5513 cut-off events. For 141598/141601 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 36528 event pairs, 539 based on Foata normal form. 4/5503 useless extension candidates. Maximal degree in co-relation 30683. Up to 4933 conditions per place. [2024-06-28 00:59:44,614 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 306 selfloop transitions, 25 changer transitions 0/344 dead transitions. [2024-06-28 00:59:44,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 344 transitions, 4877 flow [2024-06-28 00:59:44,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:59:44,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:59:44,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-28 00:59:44,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-06-28 00:59:44,615 INFO L175 Difference]: Start difference. First operand has 264 places, 325 transitions, 4141 flow. Second operand 5 states and 138 transitions. [2024-06-28 00:59:44,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 344 transitions, 4877 flow [2024-06-28 00:59:45,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 344 transitions, 4801 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-28 00:59:45,053 INFO L231 Difference]: Finished difference. Result has 266 places, 327 transitions, 4160 flow [2024-06-28 00:59:45,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4069, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4160, PETRI_PLACES=266, PETRI_TRANSITIONS=327} [2024-06-28 00:59:45,053 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 217 predicate places. [2024-06-28 00:59:45,054 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 327 transitions, 4160 flow [2024-06-28 00:59:45,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:45,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:45,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:45,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 00:59:45,054 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:45,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:45,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1220229186, now seen corresponding path program 1 times [2024-06-28 00:59:45,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:45,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800062249] [2024-06-28 00:59:45,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:45,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:45,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:45,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800062249] [2024-06-28 00:59:45,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800062249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:45,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:45,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:59:45,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077802115] [2024-06-28 00:59:45,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:45,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:59:45,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:45,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:59:45,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:59:45,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 45 [2024-06-28 00:59:45,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 327 transitions, 4160 flow. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:45,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:45,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 45 [2024-06-28 00:59:45,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:46,449 INFO L124 PetriNetUnfolderBase]: 4715/8516 cut-off events. [2024-06-28 00:59:46,449 INFO L125 PetriNetUnfolderBase]: For 196132/196900 co-relation queries the response was YES. [2024-06-28 00:59:46,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43094 conditions, 8516 events. 4715/8516 cut-off events. For 196132/196900 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 68629 event pairs, 1052 based on Foata normal form. 475/8495 useless extension candidates. Maximal degree in co-relation 42978. Up to 2970 conditions per place. [2024-06-28 00:59:46,750 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 205 selfloop transitions, 170 changer transitions 110/654 dead transitions. [2024-06-28 00:59:46,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 654 transitions, 9021 flow [2024-06-28 00:59:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:46,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:46,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-06-28 00:59:46,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7015873015873015 [2024-06-28 00:59:46,751 INFO L175 Difference]: Start difference. First operand has 266 places, 327 transitions, 4160 flow. Second operand 7 states and 221 transitions. [2024-06-28 00:59:46,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 654 transitions, 9021 flow [2024-06-28 00:59:47,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 654 transitions, 8944 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 00:59:47,301 INFO L231 Difference]: Finished difference. Result has 274 places, 422 transitions, 6111 flow [2024-06-28 00:59:47,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4085, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6111, PETRI_PLACES=274, PETRI_TRANSITIONS=422} [2024-06-28 00:59:47,302 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 225 predicate places. [2024-06-28 00:59:47,302 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 422 transitions, 6111 flow [2024-06-28 00:59:47,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:47,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:47,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:47,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 00:59:47,303 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:47,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:47,303 INFO L85 PathProgramCache]: Analyzing trace with hash 338238964, now seen corresponding path program 1 times [2024-06-28 00:59:47,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:47,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93566939] [2024-06-28 00:59:47,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:47,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:47,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:47,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93566939] [2024-06-28 00:59:47,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93566939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:47,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:47,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:47,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534973093] [2024-06-28 00:59:47,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:47,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:47,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:47,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:47,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:47,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:47,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 422 transitions, 6111 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:47,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:47,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:47,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:48,984 INFO L124 PetriNetUnfolderBase]: 5223/8948 cut-off events. [2024-06-28 00:59:48,984 INFO L125 PetriNetUnfolderBase]: For 252064/252305 co-relation queries the response was YES. [2024-06-28 00:59:49,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52592 conditions, 8948 events. 5223/8948 cut-off events. For 252064/252305 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 66069 event pairs, 1432 based on Foata normal form. 165/8972 useless extension candidates. Maximal degree in co-relation 52471. Up to 7346 conditions per place. [2024-06-28 00:59:49,091 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 314 selfloop transitions, 69 changer transitions 65/462 dead transitions. [2024-06-28 00:59:49,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 462 transitions, 7290 flow [2024-06-28 00:59:49,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:49,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:49,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-28 00:59:49,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-28 00:59:49,092 INFO L175 Difference]: Start difference. First operand has 274 places, 422 transitions, 6111 flow. Second operand 7 states and 195 transitions. [2024-06-28 00:59:49,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 462 transitions, 7290 flow [2024-06-28 00:59:49,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 462 transitions, 7290 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 00:59:49,869 INFO L231 Difference]: Finished difference. Result has 281 places, 369 transitions, 5272 flow [2024-06-28 00:59:49,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6111, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5272, PETRI_PLACES=281, PETRI_TRANSITIONS=369} [2024-06-28 00:59:49,870 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 232 predicate places. [2024-06-28 00:59:49,870 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 369 transitions, 5272 flow [2024-06-28 00:59:49,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:49,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:49,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:49,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 00:59:49,870 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:49,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:49,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1095325540, now seen corresponding path program 1 times [2024-06-28 00:59:49,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:49,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268275202] [2024-06-28 00:59:49,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:49,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:49,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:49,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268275202] [2024-06-28 00:59:49,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268275202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:49,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:49,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:59:49,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561263740] [2024-06-28 00:59:50,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:50,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:59:50,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:50,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:59:50,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:59:50,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:50,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 369 transitions, 5272 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 00:59:50,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:50,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:50,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:51,550 INFO L124 PetriNetUnfolderBase]: 5058/8663 cut-off events. [2024-06-28 00:59:51,550 INFO L125 PetriNetUnfolderBase]: For 306074/306402 co-relation queries the response was YES. [2024-06-28 00:59:51,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52979 conditions, 8663 events. 5058/8663 cut-off events. For 306074/306402 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 63674 event pairs, 1111 based on Foata normal form. 193/8709 useless extension candidates. Maximal degree in co-relation 52855. Up to 6074 conditions per place. [2024-06-28 00:59:51,658 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 263 selfloop transitions, 147 changer transitions 0/424 dead transitions. [2024-06-28 00:59:51,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 424 transitions, 6481 flow [2024-06-28 00:59:51,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:51,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-28 00:59:51,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-28 00:59:51,659 INFO L175 Difference]: Start difference. First operand has 281 places, 369 transitions, 5272 flow. Second operand 8 states and 237 transitions. [2024-06-28 00:59:51,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 424 transitions, 6481 flow [2024-06-28 00:59:52,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 424 transitions, 6369 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 00:59:52,715 INFO L231 Difference]: Finished difference. Result has 284 places, 376 transitions, 5611 flow [2024-06-28 00:59:52,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5160, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5611, PETRI_PLACES=284, PETRI_TRANSITIONS=376} [2024-06-28 00:59:52,715 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 235 predicate places. [2024-06-28 00:59:52,715 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 376 transitions, 5611 flow [2024-06-28 00:59:52,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 00:59:52,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:52,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:52,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 00:59:52,716 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:52,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:52,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1361349250, now seen corresponding path program 2 times [2024-06-28 00:59:52,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:52,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51664624] [2024-06-28 00:59:52,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:52,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:52,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:52,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51664624] [2024-06-28 00:59:52,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51664624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:52,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:52,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:59:52,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120036238] [2024-06-28 00:59:52,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:52,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:59:52,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:52,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:59:52,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:59:52,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:52,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 376 transitions, 5611 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 00:59:52,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:52,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:52,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:54,421 INFO L124 PetriNetUnfolderBase]: 5147/8514 cut-off events. [2024-06-28 00:59:54,422 INFO L125 PetriNetUnfolderBase]: For 327357/327632 co-relation queries the response was YES. [2024-06-28 00:59:54,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54874 conditions, 8514 events. 5147/8514 cut-off events. For 327357/327632 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 60805 event pairs, 1146 based on Foata normal form. 176/8520 useless extension candidates. Maximal degree in co-relation 54748. Up to 6906 conditions per place. [2024-06-28 00:59:54,524 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 267 selfloop transitions, 137 changer transitions 0/418 dead transitions. [2024-06-28 00:59:54,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 418 transitions, 6603 flow [2024-06-28 00:59:54,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:54,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-28 00:59:54,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-28 00:59:54,526 INFO L175 Difference]: Start difference. First operand has 284 places, 376 transitions, 5611 flow. Second operand 8 states and 230 transitions. [2024-06-28 00:59:54,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 418 transitions, 6603 flow [2024-06-28 00:59:55,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 418 transitions, 6387 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 00:59:55,676 INFO L231 Difference]: Finished difference. Result has 289 places, 378 transitions, 5729 flow [2024-06-28 00:59:55,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5395, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5729, PETRI_PLACES=289, PETRI_TRANSITIONS=378} [2024-06-28 00:59:55,676 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 240 predicate places. [2024-06-28 00:59:55,676 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 378 transitions, 5729 flow [2024-06-28 00:59:55,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 00:59:55,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:55,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:55,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 00:59:55,677 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:55,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:55,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1359833528, now seen corresponding path program 3 times [2024-06-28 00:59:55,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:55,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568580739] [2024-06-28 00:59:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:55,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:55,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:55,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568580739] [2024-06-28 00:59:55,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568580739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:55,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:55,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:59:55,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254170166] [2024-06-28 00:59:55,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:55,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:59:55,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:55,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:59:55,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:59:55,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:55,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 378 transitions, 5729 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 00:59:55,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:55,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:55,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:57,262 INFO L124 PetriNetUnfolderBase]: 5251/8951 cut-off events. [2024-06-28 00:59:57,262 INFO L125 PetriNetUnfolderBase]: For 335361/335645 co-relation queries the response was YES. [2024-06-28 00:59:57,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57182 conditions, 8951 events. 5251/8951 cut-off events. For 335361/335645 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 65999 event pairs, 1269 based on Foata normal form. 169/8943 useless extension candidates. Maximal degree in co-relation 57054. Up to 6894 conditions per place. [2024-06-28 00:59:57,373 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 269 selfloop transitions, 141 changer transitions 0/424 dead transitions. [2024-06-28 00:59:57,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 424 transitions, 6763 flow [2024-06-28 00:59:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-28 00:59:57,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2024-06-28 00:59:57,375 INFO L175 Difference]: Start difference. First operand has 289 places, 378 transitions, 5729 flow. Second operand 8 states and 233 transitions. [2024-06-28 00:59:57,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 424 transitions, 6763 flow [2024-06-28 00:59:58,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 424 transitions, 6471 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:58,501 INFO L231 Difference]: Finished difference. Result has 292 places, 381 transitions, 5802 flow [2024-06-28 00:59:58,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5437, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5802, PETRI_PLACES=292, PETRI_TRANSITIONS=381} [2024-06-28 00:59:58,501 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 243 predicate places. [2024-06-28 00:59:58,501 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 381 transitions, 5802 flow [2024-06-28 00:59:58,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 00:59:58,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:58,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:58,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 00:59:58,502 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:58,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:58,502 INFO L85 PathProgramCache]: Analyzing trace with hash -2118634676, now seen corresponding path program 4 times [2024-06-28 00:59:58,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:58,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538727817] [2024-06-28 00:59:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:58,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:58,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:58,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538727817] [2024-06-28 00:59:58,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538727817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:58,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:58,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:59:58,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538733298] [2024-06-28 00:59:58,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:58,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:59:58,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:58,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:59:58,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:59:58,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:59:58,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 381 transitions, 5802 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 00:59:58,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:58,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:59:58,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:00,114 INFO L124 PetriNetUnfolderBase]: 5413/9404 cut-off events. [2024-06-28 01:00:00,114 INFO L125 PetriNetUnfolderBase]: For 361668/362015 co-relation queries the response was YES. [2024-06-28 01:00:00,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59451 conditions, 9404 events. 5413/9404 cut-off events. For 361668/362015 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 71075 event pairs, 1462 based on Foata normal form. 226/9490 useless extension candidates. Maximal degree in co-relation 59321. Up to 7255 conditions per place. [2024-06-28 01:00:00,224 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 297 selfloop transitions, 106 changer transitions 0/417 dead transitions. [2024-06-28 01:00:00,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 417 transitions, 6777 flow [2024-06-28 01:00:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:00:00,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:00:00,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-28 01:00:00,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 01:00:00,225 INFO L175 Difference]: Start difference. First operand has 292 places, 381 transitions, 5802 flow. Second operand 8 states and 224 transitions. [2024-06-28 01:00:00,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 417 transitions, 6777 flow [2024-06-28 01:00:01,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 417 transitions, 6468 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 01:00:01,454 INFO L231 Difference]: Finished difference. Result has 294 places, 383 transitions, 5766 flow [2024-06-28 01:00:01,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5493, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5766, PETRI_PLACES=294, PETRI_TRANSITIONS=383} [2024-06-28 01:00:01,455 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 245 predicate places. [2024-06-28 01:00:01,455 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 383 transitions, 5766 flow [2024-06-28 01:00:01,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:01,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:01,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:01,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 01:00:01,456 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:01,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:01,456 INFO L85 PathProgramCache]: Analyzing trace with hash -2129359436, now seen corresponding path program 5 times [2024-06-28 01:00:01,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:01,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956687714] [2024-06-28 01:00:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:01,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:01,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:01,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956687714] [2024-06-28 01:00:01,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956687714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:01,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:01,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:01,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595403055] [2024-06-28 01:00:01,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:01,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:01,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:01,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:01,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:01,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:00:01,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 383 transitions, 5766 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:01,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:01,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:00:01,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:03,118 INFO L124 PetriNetUnfolderBase]: 5520/9404 cut-off events. [2024-06-28 01:00:03,118 INFO L125 PetriNetUnfolderBase]: For 369639/369952 co-relation queries the response was YES. [2024-06-28 01:00:03,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60289 conditions, 9404 events. 5520/9404 cut-off events. For 369639/369952 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 70006 event pairs, 1360 based on Foata normal form. 187/9412 useless extension candidates. Maximal degree in co-relation 60159. Up to 7439 conditions per place. [2024-06-28 01:00:03,245 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 295 selfloop transitions, 110 changer transitions 0/419 dead transitions. [2024-06-28 01:00:03,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 419 transitions, 6754 flow [2024-06-28 01:00:03,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:00:03,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:00:03,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-28 01:00:03,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 01:00:03,246 INFO L175 Difference]: Start difference. First operand has 294 places, 383 transitions, 5766 flow. Second operand 8 states and 225 transitions. [2024-06-28 01:00:03,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 419 transitions, 6754 flow [2024-06-28 01:00:05,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 419 transitions, 6520 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 01:00:05,054 INFO L231 Difference]: Finished difference. Result has 296 places, 385 transitions, 5822 flow [2024-06-28 01:00:05,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5532, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5822, PETRI_PLACES=296, PETRI_TRANSITIONS=385} [2024-06-28 01:00:05,054 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 247 predicate places. [2024-06-28 01:00:05,054 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 385 transitions, 5822 flow [2024-06-28 01:00:05,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:05,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:05,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:05,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 01:00:05,055 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:05,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:05,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2129685866, now seen corresponding path program 6 times [2024-06-28 01:00:05,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:05,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167968730] [2024-06-28 01:00:05,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:05,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:05,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:05,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167968730] [2024-06-28 01:00:05,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167968730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:05,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:05,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:05,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939277006] [2024-06-28 01:00:05,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:05,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:05,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:05,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:05,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:05,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:00:05,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 385 transitions, 5822 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:05,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:05,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:00:05,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:07,022 INFO L124 PetriNetUnfolderBase]: 5681/9821 cut-off events. [2024-06-28 01:00:07,022 INFO L125 PetriNetUnfolderBase]: For 380920/381289 co-relation queries the response was YES. [2024-06-28 01:00:07,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62346 conditions, 9821 events. 5681/9821 cut-off events. For 380920/381289 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 74606 event pairs, 1484 based on Foata normal form. 205/9861 useless extension candidates. Maximal degree in co-relation 62215. Up to 7368 conditions per place. [2024-06-28 01:00:07,395 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 296 selfloop transitions, 116 changer transitions 1/427 dead transitions. [2024-06-28 01:00:07,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 427 transitions, 6880 flow [2024-06-28 01:00:07,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:00:07,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:00:07,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-28 01:00:07,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-28 01:00:07,396 INFO L175 Difference]: Start difference. First operand has 296 places, 385 transitions, 5822 flow. Second operand 8 states and 227 transitions. [2024-06-28 01:00:07,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 427 transitions, 6880 flow [2024-06-28 01:00:08,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 427 transitions, 6632 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 01:00:08,990 INFO L231 Difference]: Finished difference. Result has 299 places, 389 transitions, 5910 flow [2024-06-28 01:00:08,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5574, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5910, PETRI_PLACES=299, PETRI_TRANSITIONS=389} [2024-06-28 01:00:08,991 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 250 predicate places. [2024-06-28 01:00:08,991 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 389 transitions, 5910 flow [2024-06-28 01:00:08,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:08,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:08,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:08,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 01:00:08,992 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:08,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:08,992 INFO L85 PathProgramCache]: Analyzing trace with hash 617736040, now seen corresponding path program 2 times [2024-06-28 01:00:08,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:08,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460979251] [2024-06-28 01:00:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:08,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:09,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:09,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460979251] [2024-06-28 01:00:09,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460979251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:09,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:09,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:09,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392142654] [2024-06-28 01:00:09,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:09,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:09,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:09,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:09,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:09,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:00:09,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 389 transitions, 5910 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:09,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:09,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:00:09,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:11,030 INFO L124 PetriNetUnfolderBase]: 5744/9439 cut-off events. [2024-06-28 01:00:11,030 INFO L125 PetriNetUnfolderBase]: For 366519/366865 co-relation queries the response was YES. [2024-06-28 01:00:11,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62412 conditions, 9439 events. 5744/9439 cut-off events. For 366519/366865 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 68276 event pairs, 1239 based on Foata normal form. 190/9415 useless extension candidates. Maximal degree in co-relation 62279. Up to 7859 conditions per place. [2024-06-28 01:00:11,256 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 264 selfloop transitions, 155 changer transitions 0/433 dead transitions. [2024-06-28 01:00:11,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 433 transitions, 7195 flow [2024-06-28 01:00:11,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:00:11,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:00:11,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-28 01:00:11,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603174603174603 [2024-06-28 01:00:11,257 INFO L175 Difference]: Start difference. First operand has 299 places, 389 transitions, 5910 flow. Second operand 7 states and 208 transitions. [2024-06-28 01:00:11,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 433 transitions, 7195 flow [2024-06-28 01:00:12,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 433 transitions, 6934 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 01:00:12,840 INFO L231 Difference]: Finished difference. Result has 301 places, 395 transitions, 6058 flow [2024-06-28 01:00:12,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5649, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6058, PETRI_PLACES=301, PETRI_TRANSITIONS=395} [2024-06-28 01:00:12,840 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 252 predicate places. [2024-06-28 01:00:12,840 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 395 transitions, 6058 flow [2024-06-28 01:00:12,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:12,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:12,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:12,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 01:00:12,841 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:12,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:12,841 INFO L85 PathProgramCache]: Analyzing trace with hash 963728316, now seen corresponding path program 3 times [2024-06-28 01:00:12,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:12,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849434953] [2024-06-28 01:00:12,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:12,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:12,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:12,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849434953] [2024-06-28 01:00:12,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849434953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:12,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:12,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:12,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293391246] [2024-06-28 01:00:12,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:12,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:12,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:12,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:12,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:13,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:00:13,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 395 transitions, 6058 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:13,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:13,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:00:13,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:14,961 INFO L124 PetriNetUnfolderBase]: 5726/9968 cut-off events. [2024-06-28 01:00:14,961 INFO L125 PetriNetUnfolderBase]: For 375016/375349 co-relation queries the response was YES. [2024-06-28 01:00:15,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62583 conditions, 9968 events. 5726/9968 cut-off events. For 375016/375349 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 76447 event pairs, 1549 based on Foata normal form. 183/9994 useless extension candidates. Maximal degree in co-relation 62449. Up to 8222 conditions per place. [2024-06-28 01:00:15,232 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 346 selfloop transitions, 70 changer transitions 0/430 dead transitions. [2024-06-28 01:00:15,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 430 transitions, 7016 flow [2024-06-28 01:00:15,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:00:15,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:00:15,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-28 01:00:15,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-28 01:00:15,233 INFO L175 Difference]: Start difference. First operand has 301 places, 395 transitions, 6058 flow. Second operand 7 states and 200 transitions. [2024-06-28 01:00:15,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 430 transitions, 7016 flow [2024-06-28 01:00:16,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 430 transitions, 6583 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 01:00:16,627 INFO L231 Difference]: Finished difference. Result has 303 places, 397 transitions, 5803 flow [2024-06-28 01:00:16,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5631, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5803, PETRI_PLACES=303, PETRI_TRANSITIONS=397} [2024-06-28 01:00:16,628 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 254 predicate places. [2024-06-28 01:00:16,628 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 397 transitions, 5803 flow [2024-06-28 01:00:16,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:16,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:16,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:16,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 01:00:16,628 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:16,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:16,629 INFO L85 PathProgramCache]: Analyzing trace with hash 468284754, now seen corresponding path program 4 times [2024-06-28 01:00:16,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:16,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855392936] [2024-06-28 01:00:16,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:16,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:16,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:16,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855392936] [2024-06-28 01:00:16,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855392936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:16,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:16,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:16,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800478630] [2024-06-28 01:00:16,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:16,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:16,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:16,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:16,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:16,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:00:16,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 397 transitions, 5803 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:16,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:16,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:00:16,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:18,712 INFO L124 PetriNetUnfolderBase]: 5760/9966 cut-off events. [2024-06-28 01:00:18,713 INFO L125 PetriNetUnfolderBase]: For 383386/383751 co-relation queries the response was YES. [2024-06-28 01:00:18,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62627 conditions, 9966 events. 5760/9966 cut-off events. For 383386/383751 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 76019 event pairs, 1489 based on Foata normal form. 205/10011 useless extension candidates. Maximal degree in co-relation 62493. Up to 7859 conditions per place. [2024-06-28 01:00:18,832 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 287 selfloop transitions, 141 changer transitions 0/442 dead transitions. [2024-06-28 01:00:18,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 442 transitions, 7274 flow [2024-06-28 01:00:18,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:00:18,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:00:18,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-28 01:00:18,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-28 01:00:18,833 INFO L175 Difference]: Start difference. First operand has 303 places, 397 transitions, 5803 flow. Second operand 7 states and 205 transitions. [2024-06-28 01:00:18,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 442 transitions, 7274 flow [2024-06-28 01:00:20,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 442 transitions, 7131 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 01:00:20,441 INFO L231 Difference]: Finished difference. Result has 305 places, 406 transitions, 6081 flow [2024-06-28 01:00:20,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5660, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6081, PETRI_PLACES=305, PETRI_TRANSITIONS=406} [2024-06-28 01:00:20,442 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 256 predicate places. [2024-06-28 01:00:20,442 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 406 transitions, 6081 flow [2024-06-28 01:00:20,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:20,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:20,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:20,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 01:00:20,442 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:20,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:20,443 INFO L85 PathProgramCache]: Analyzing trace with hash 969269628, now seen corresponding path program 1 times [2024-06-28 01:00:20,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:20,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970037746] [2024-06-28 01:00:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:20,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:20,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:20,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:20,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970037746] [2024-06-28 01:00:20,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970037746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:20,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:20,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:20,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374173763] [2024-06-28 01:00:20,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:20,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:20,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:20,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:20,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:20,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:00:20,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 406 transitions, 6081 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:20,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:20,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:00:20,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:22,662 INFO L124 PetriNetUnfolderBase]: 5855/10125 cut-off events. [2024-06-28 01:00:22,663 INFO L125 PetriNetUnfolderBase]: For 404106/404507 co-relation queries the response was YES. [2024-06-28 01:00:22,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64247 conditions, 10125 events. 5855/10125 cut-off events. For 404106/404507 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 77329 event pairs, 1492 based on Foata normal form. 192/10154 useless extension candidates. Maximal degree in co-relation 64112. Up to 7309 conditions per place. [2024-06-28 01:00:23,031 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 263 selfloop transitions, 179 changer transitions 3/459 dead transitions. [2024-06-28 01:00:23,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 459 transitions, 7636 flow [2024-06-28 01:00:23,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:00:23,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:00:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-28 01:00:23,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-28 01:00:23,032 INFO L175 Difference]: Start difference. First operand has 305 places, 406 transitions, 6081 flow. Second operand 8 states and 234 transitions. [2024-06-28 01:00:23,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 459 transitions, 7636 flow [2024-06-28 01:00:24,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 459 transitions, 7398 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-28 01:00:24,641 INFO L231 Difference]: Finished difference. Result has 311 places, 417 transitions, 6415 flow [2024-06-28 01:00:24,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5843, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6415, PETRI_PLACES=311, PETRI_TRANSITIONS=417} [2024-06-28 01:00:24,641 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 262 predicate places. [2024-06-28 01:00:24,641 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 417 transitions, 6415 flow [2024-06-28 01:00:24,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:24,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:24,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:24,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 01:00:24,642 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:24,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:24,643 INFO L85 PathProgramCache]: Analyzing trace with hash 969269256, now seen corresponding path program 5 times [2024-06-28 01:00:24,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:24,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596268532] [2024-06-28 01:00:24,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:24,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:24,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:24,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596268532] [2024-06-28 01:00:24,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596268532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:24,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:24,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:24,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526011513] [2024-06-28 01:00:24,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:24,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:24,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:24,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:24,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:24,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:00:24,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 417 transitions, 6415 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:24,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:24,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:00:24,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:26,628 INFO L124 PetriNetUnfolderBase]: 5827/10070 cut-off events. [2024-06-28 01:00:26,629 INFO L125 PetriNetUnfolderBase]: For 417512/417880 co-relation queries the response was YES. [2024-06-28 01:00:26,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65662 conditions, 10070 events. 5827/10070 cut-off events. For 417512/417880 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 76869 event pairs, 1475 based on Foata normal form. 208/10116 useless extension candidates. Maximal degree in co-relation 65525. Up to 7961 conditions per place. [2024-06-28 01:00:26,752 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 307 selfloop transitions, 128 changer transitions 0/449 dead transitions. [2024-06-28 01:00:26,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 449 transitions, 7639 flow [2024-06-28 01:00:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:00:26,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:00:26,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-28 01:00:26,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-06-28 01:00:26,754 INFO L175 Difference]: Start difference. First operand has 311 places, 417 transitions, 6415 flow. Second operand 7 states and 201 transitions. [2024-06-28 01:00:26,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 449 transitions, 7639 flow [2024-06-28 01:00:28,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 449 transitions, 7473 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-28 01:00:28,587 INFO L231 Difference]: Finished difference. Result has 315 places, 417 transitions, 6514 flow [2024-06-28 01:00:28,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6249, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6514, PETRI_PLACES=315, PETRI_TRANSITIONS=417} [2024-06-28 01:00:28,587 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 266 predicate places. [2024-06-28 01:00:28,587 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 417 transitions, 6514 flow [2024-06-28 01:00:28,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:28,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:28,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:28,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 01:00:28,588 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:28,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:28,588 INFO L85 PathProgramCache]: Analyzing trace with hash -695251148, now seen corresponding path program 2 times [2024-06-28 01:00:28,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:28,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587215383] [2024-06-28 01:00:28,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:28,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:28,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:28,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587215383] [2024-06-28 01:00:28,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587215383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:28,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:28,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:28,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142235624] [2024-06-28 01:00:28,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:28,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:28,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:28,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:28,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:28,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:00:28,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 417 transitions, 6514 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:28,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:28,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:00:28,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:30,803 INFO L124 PetriNetUnfolderBase]: 5881/10006 cut-off events. [2024-06-28 01:00:30,803 INFO L125 PetriNetUnfolderBase]: For 433239/433571 co-relation queries the response was YES. [2024-06-28 01:00:30,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66709 conditions, 10006 events. 5881/10006 cut-off events. For 433239/433571 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 75155 event pairs, 1382 based on Foata normal form. 187/10006 useless extension candidates. Maximal degree in co-relation 66570. Up to 8056 conditions per place. [2024-06-28 01:00:30,920 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 319 selfloop transitions, 132 changer transitions 0/465 dead transitions. [2024-06-28 01:00:30,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 465 transitions, 7792 flow [2024-06-28 01:00:30,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:00:30,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:00:30,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2024-06-28 01:00:30,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6088888888888889 [2024-06-28 01:00:30,921 INFO L175 Difference]: Start difference. First operand has 315 places, 417 transitions, 6514 flow. Second operand 10 states and 274 transitions. [2024-06-28 01:00:30,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 465 transitions, 7792 flow [2024-06-28 01:00:32,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 465 transitions, 7576 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 01:00:32,360 INFO L231 Difference]: Finished difference. Result has 321 places, 425 transitions, 6699 flow [2024-06-28 01:00:32,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6298, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6699, PETRI_PLACES=321, PETRI_TRANSITIONS=425} [2024-06-28 01:00:32,361 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 272 predicate places. [2024-06-28 01:00:32,361 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 425 transitions, 6699 flow [2024-06-28 01:00:32,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:32,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:32,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:32,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 01:00:32,362 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:32,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:32,362 INFO L85 PathProgramCache]: Analyzing trace with hash 301040720, now seen corresponding path program 3 times [2024-06-28 01:00:32,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:32,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197302969] [2024-06-28 01:00:32,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:32,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:32,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:32,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197302969] [2024-06-28 01:00:32,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197302969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:32,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:32,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:32,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282599258] [2024-06-28 01:00:32,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:32,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:32,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:32,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:32,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:32,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:00:32,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 425 transitions, 6699 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:32,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:32,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:00:32,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:34,765 INFO L124 PetriNetUnfolderBase]: 5862/10223 cut-off events. [2024-06-28 01:00:34,766 INFO L125 PetriNetUnfolderBase]: For 444175/444539 co-relation queries the response was YES. [2024-06-28 01:00:34,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67054 conditions, 10223 events. 5862/10223 cut-off events. For 444175/444539 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 78873 event pairs, 1535 based on Foata normal form. 207/10278 useless extension candidates. Maximal degree in co-relation 66914. Up to 8030 conditions per place. [2024-06-28 01:00:34,911 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 313 selfloop transitions, 131 changer transitions 0/458 dead transitions. [2024-06-28 01:00:34,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 458 transitions, 7687 flow [2024-06-28 01:00:34,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:00:34,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:00:34,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-28 01:00:34,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-28 01:00:34,913 INFO L175 Difference]: Start difference. First operand has 321 places, 425 transitions, 6699 flow. Second operand 8 states and 227 transitions. [2024-06-28 01:00:34,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 458 transitions, 7687 flow [2024-06-28 01:00:36,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 458 transitions, 7445 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-28 01:00:36,967 INFO L231 Difference]: Finished difference. Result has 323 places, 425 transitions, 6726 flow [2024-06-28 01:00:36,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6457, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6726, PETRI_PLACES=323, PETRI_TRANSITIONS=425} [2024-06-28 01:00:36,967 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 274 predicate places. [2024-06-28 01:00:36,967 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 425 transitions, 6726 flow [2024-06-28 01:00:36,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:36,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:36,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:36,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 01:00:36,968 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:36,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:36,968 INFO L85 PathProgramCache]: Analyzing trace with hash 972982746, now seen corresponding path program 6 times [2024-06-28 01:00:36,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:36,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784073186] [2024-06-28 01:00:36,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:36,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:37,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:37,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784073186] [2024-06-28 01:00:37,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784073186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:37,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:37,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:37,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838299074] [2024-06-28 01:00:37,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:37,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:37,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:37,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:37,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:37,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:00:37,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 425 transitions, 6726 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:37,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:37,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:00:37,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:39,273 INFO L124 PetriNetUnfolderBase]: 5872/10141 cut-off events. [2024-06-28 01:00:39,274 INFO L125 PetriNetUnfolderBase]: For 445055/445371 co-relation queries the response was YES. [2024-06-28 01:00:39,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67488 conditions, 10141 events. 5872/10141 cut-off events. For 445055/445371 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 77302 event pairs, 1538 based on Foata normal form. 178/10139 useless extension candidates. Maximal degree in co-relation 67346. Up to 8354 conditions per place. [2024-06-28 01:00:39,388 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 365 selfloop transitions, 79 changer transitions 0/458 dead transitions. [2024-06-28 01:00:39,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 458 transitions, 7716 flow [2024-06-28 01:00:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:00:39,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:00:39,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-28 01:00:39,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5950617283950618 [2024-06-28 01:00:39,389 INFO L175 Difference]: Start difference. First operand has 323 places, 425 transitions, 6726 flow. Second operand 9 states and 241 transitions. [2024-06-28 01:00:39,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 458 transitions, 7716 flow [2024-06-28 01:00:40,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 458 transitions, 7450 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 01:00:40,835 INFO L231 Difference]: Finished difference. Result has 325 places, 425 transitions, 6624 flow [2024-06-28 01:00:40,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6460, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6624, PETRI_PLACES=325, PETRI_TRANSITIONS=425} [2024-06-28 01:00:40,835 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 276 predicate places. [2024-06-28 01:00:40,835 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 425 transitions, 6624 flow [2024-06-28 01:00:40,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:40,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:40,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:40,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 01:00:40,836 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:40,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:40,837 INFO L85 PathProgramCache]: Analyzing trace with hash 616198836, now seen corresponding path program 4 times [2024-06-28 01:00:40,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:40,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549423624] [2024-06-28 01:00:40,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:40,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:40,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:40,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549423624] [2024-06-28 01:00:40,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549423624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:40,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:40,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:40,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482111257] [2024-06-28 01:00:40,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:40,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:40,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:40,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:40,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:41,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:00:41,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 425 transitions, 6624 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:41,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:41,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:00:41,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:43,363 INFO L124 PetriNetUnfolderBase]: 6010/10440 cut-off events. [2024-06-28 01:00:43,363 INFO L125 PetriNetUnfolderBase]: For 479008/479375 co-relation queries the response was YES. [2024-06-28 01:00:43,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69386 conditions, 10440 events. 6010/10440 cut-off events. For 479008/479375 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 80506 event pairs, 1538 based on Foata normal form. 207/10490 useless extension candidates. Maximal degree in co-relation 69243. Up to 8034 conditions per place. [2024-06-28 01:00:43,492 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 331 selfloop transitions, 138 changer transitions 1/484 dead transitions. [2024-06-28 01:00:43,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 484 transitions, 8422 flow [2024-06-28 01:00:43,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:00:43,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:00:43,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 300 transitions. [2024-06-28 01:00:43,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-06-28 01:00:43,493 INFO L175 Difference]: Start difference. First operand has 325 places, 425 transitions, 6624 flow. Second operand 11 states and 300 transitions. [2024-06-28 01:00:43,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 484 transitions, 8422 flow [2024-06-28 01:00:45,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 484 transitions, 8187 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-28 01:00:45,111 INFO L231 Difference]: Finished difference. Result has 327 places, 440 transitions, 6959 flow [2024-06-28 01:00:45,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6389, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6959, PETRI_PLACES=327, PETRI_TRANSITIONS=440} [2024-06-28 01:00:45,112 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 278 predicate places. [2024-06-28 01:00:45,112 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 440 transitions, 6959 flow [2024-06-28 01:00:45,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:45,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:45,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:45,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 01:00:45,113 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:45,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:45,114 INFO L85 PathProgramCache]: Analyzing trace with hash 616400646, now seen corresponding path program 5 times [2024-06-28 01:00:45,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:45,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429456422] [2024-06-28 01:00:45,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:45,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:45,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:45,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429456422] [2024-06-28 01:00:45,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429456422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:45,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:45,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:45,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936190488] [2024-06-28 01:00:45,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:45,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:45,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:45,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:45,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:45,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:00:45,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 440 transitions, 6959 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:45,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:45,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:00:45,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:47,439 INFO L124 PetriNetUnfolderBase]: 6011/10358 cut-off events. [2024-06-28 01:00:47,439 INFO L125 PetriNetUnfolderBase]: For 486139/486509 co-relation queries the response was YES. [2024-06-28 01:00:47,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69896 conditions, 10358 events. 6011/10358 cut-off events. For 486139/486509 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 79125 event pairs, 1449 based on Foata normal form. 218/10413 useless extension candidates. Maximal degree in co-relation 69751. Up to 8042 conditions per place. [2024-06-28 01:00:47,566 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 326 selfloop transitions, 138 changer transitions 1/479 dead transitions. [2024-06-28 01:00:47,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 479 transitions, 8218 flow [2024-06-28 01:00:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:00:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:00:47,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 271 transitions. [2024-06-28 01:00:47,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022222222222222 [2024-06-28 01:00:47,567 INFO L175 Difference]: Start difference. First operand has 327 places, 440 transitions, 6959 flow. Second operand 10 states and 271 transitions. [2024-06-28 01:00:47,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 479 transitions, 8218 flow [2024-06-28 01:00:49,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 479 transitions, 7878 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-28 01:00:49,626 INFO L231 Difference]: Finished difference. Result has 331 places, 440 transitions, 6902 flow [2024-06-28 01:00:49,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6619, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6902, PETRI_PLACES=331, PETRI_TRANSITIONS=440} [2024-06-28 01:00:49,629 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 282 predicate places. [2024-06-28 01:00:49,629 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 440 transitions, 6902 flow [2024-06-28 01:00:49,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:49,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:49,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:49,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 01:00:49,630 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:49,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:49,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1668412550, now seen corresponding path program 6 times [2024-06-28 01:00:49,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:49,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634988114] [2024-06-28 01:00:49,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:49,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:49,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:49,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634988114] [2024-06-28 01:00:49,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634988114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:49,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:49,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:49,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597314316] [2024-06-28 01:00:49,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:49,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:49,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:49,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:49,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:49,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:00:49,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 440 transitions, 6902 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:49,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:49,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:00:49,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:51,935 INFO L124 PetriNetUnfolderBase]: 6005/10364 cut-off events. [2024-06-28 01:00:51,935 INFO L125 PetriNetUnfolderBase]: For 490945/491329 co-relation queries the response was YES. [2024-06-28 01:00:52,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69667 conditions, 10364 events. 6005/10364 cut-off events. For 490945/491329 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 79345 event pairs, 1459 based on Foata normal form. 214/10415 useless extension candidates. Maximal degree in co-relation 69521. Up to 8037 conditions per place. [2024-06-28 01:00:52,075 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 324 selfloop transitions, 137 changer transitions 1/476 dead transitions. [2024-06-28 01:00:52,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 476 transitions, 8147 flow [2024-06-28 01:00:52,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:00:52,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:00:52,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-06-28 01:00:52,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6172839506172839 [2024-06-28 01:00:52,076 INFO L175 Difference]: Start difference. First operand has 331 places, 440 transitions, 6902 flow. Second operand 9 states and 250 transitions. [2024-06-28 01:00:52,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 476 transitions, 8147 flow [2024-06-28 01:00:54,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 476 transitions, 7857 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-28 01:00:54,044 INFO L231 Difference]: Finished difference. Result has 332 places, 440 transitions, 6893 flow [2024-06-28 01:00:54,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6612, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6893, PETRI_PLACES=332, PETRI_TRANSITIONS=440} [2024-06-28 01:00:54,045 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 283 predicate places. [2024-06-28 01:00:54,045 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 440 transitions, 6893 flow [2024-06-28 01:00:54,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:54,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:54,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:54,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 01:00:54,046 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:54,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:54,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1676046362, now seen corresponding path program 1 times [2024-06-28 01:00:54,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:54,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19210638] [2024-06-28 01:00:54,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:54,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:54,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:54,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19210638] [2024-06-28 01:00:54,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19210638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:54,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:54,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:54,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271714855] [2024-06-28 01:00:54,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:54,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:54,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:54,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:54,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:54,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:00:54,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 440 transitions, 6893 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:54,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:54,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:00:54,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:56,251 INFO L124 PetriNetUnfolderBase]: 6235/10755 cut-off events. [2024-06-28 01:00:56,251 INFO L125 PetriNetUnfolderBase]: For 557752/558136 co-relation queries the response was YES. [2024-06-28 01:00:56,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72874 conditions, 10755 events. 6235/10755 cut-off events. For 557752/558136 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 82878 event pairs, 1544 based on Foata normal form. 241/10822 useless extension candidates. Maximal degree in co-relation 72727. Up to 7670 conditions per place. [2024-06-28 01:00:56,396 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 363 selfloop transitions, 105 changer transitions 1/483 dead transitions. [2024-06-28 01:00:56,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 483 transitions, 8253 flow [2024-06-28 01:00:56,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:00:56,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:00:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-28 01:00:56,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-28 01:00:56,397 INFO L175 Difference]: Start difference. First operand has 332 places, 440 transitions, 6893 flow. Second operand 8 states and 227 transitions. [2024-06-28 01:00:56,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 483 transitions, 8253 flow [2024-06-28 01:00:58,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 483 transitions, 7979 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 01:00:58,662 INFO L231 Difference]: Finished difference. Result has 333 places, 444 transitions, 6964 flow [2024-06-28 01:00:58,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6619, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6964, PETRI_PLACES=333, PETRI_TRANSITIONS=444} [2024-06-28 01:00:58,662 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 284 predicate places. [2024-06-28 01:00:58,662 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 444 transitions, 6964 flow [2024-06-28 01:00:58,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:58,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:58,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:58,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 01:00:58,663 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:58,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:58,663 INFO L85 PathProgramCache]: Analyzing trace with hash -558656964, now seen corresponding path program 7 times [2024-06-28 01:00:58,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:58,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321094182] [2024-06-28 01:00:58,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:58,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:58,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:58,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321094182] [2024-06-28 01:00:58,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321094182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:58,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:58,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:58,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146188866] [2024-06-28 01:00:58,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:58,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:58,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:58,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:58,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:58,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:00:58,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 444 transitions, 6964 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:00:58,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:58,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:00:58,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:01,324 INFO L124 PetriNetUnfolderBase]: 6367/11029 cut-off events. [2024-06-28 01:01:01,325 INFO L125 PetriNetUnfolderBase]: For 591292/591635 co-relation queries the response was YES. [2024-06-28 01:01:01,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75230 conditions, 11029 events. 6367/11029 cut-off events. For 591292/591635 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 85621 event pairs, 1366 based on Foata normal form. 215/11049 useless extension candidates. Maximal degree in co-relation 75081. Up to 8709 conditions per place. [2024-06-28 01:01:01,462 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 365 selfloop transitions, 104 changer transitions 0/483 dead transitions. [2024-06-28 01:01:01,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 483 transitions, 8087 flow [2024-06-28 01:01:01,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:01,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:01,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-28 01:01:01,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6925925925925925 [2024-06-28 01:01:01,463 INFO L175 Difference]: Start difference. First operand has 333 places, 444 transitions, 6964 flow. Second operand 6 states and 187 transitions. [2024-06-28 01:01:01,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 483 transitions, 8087 flow [2024-06-28 01:01:03,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 483 transitions, 7929 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 01:01:03,695 INFO L231 Difference]: Finished difference. Result has 335 places, 446 transitions, 7101 flow [2024-06-28 01:01:03,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6806, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7101, PETRI_PLACES=335, PETRI_TRANSITIONS=446} [2024-06-28 01:01:03,696 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 286 predicate places. [2024-06-28 01:01:03,696 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 446 transitions, 7101 flow [2024-06-28 01:01:03,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:01:03,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:03,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:03,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 01:01:03,697 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:03,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:03,698 INFO L85 PathProgramCache]: Analyzing trace with hash -68896446, now seen corresponding path program 8 times [2024-06-28 01:01:03,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:03,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647523604] [2024-06-28 01:01:03,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:03,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:03,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:03,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647523604] [2024-06-28 01:01:03,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647523604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:03,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:03,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:03,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793700917] [2024-06-28 01:01:03,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:03,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:03,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:03,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:03,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:03,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:03,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 446 transitions, 7101 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 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) [2024-06-28 01:01:03,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:03,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:03,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand